llms.txt

# phonometry

> Acoustic measurement, analysis and prediction in Python. Sound level metrology, psychoacoustics, room and building acoustics, materials, vibration, environmental and transport noise, underwater acoustics, electroacoustics and wave simulation, with every metric implemented from the text of its governing standard and 1893 numerical conformance checks against 523 standards enforced in CI.

phonometry v4.0.0rc1 is a pure-Python library built on NumPy/SciPy (Python >= 3.12). Each result is a typed, frozen dataclass that carries the inputs it was computed from, draws its own figure with a one-line `.plot()` in English or Spanish, and, where a standard defines a reporting format, renders that format as a PDF with `.report()`. The conformance report pins each of the 1893 checks to a standard, a clause or table, the normative expected value and the value the library computes, across 111 domains.

The project was published as **PyOctaveBand** until version 3.0.0. Third-party references and dependency pins still using that name refer to this library.

Install:

```bash
pip install phonometry            # core (NumPy + SciPy only)
pip install phonometry[plot]      # + matplotlib figures and .plot()
pip install phonometry[perf]      # + numba-jitted impulse kernel
pip install phonometry[report]    # + reportlab and svglib, for .report() PDF fiches
pip install phonometry[full]      # all of the above (recommended)
```

I recommend `pip install phonometry[full]`, which enables every feature. The base install computes every metric on NumPy and SciPy alone; without the extras only the `.plot()` figures and the `.report()` PDF fiches (whose figure panel needs matplotlib as well as reportlab and svglib) are unavailable. The `impulse` time weighting still works without numba, on a pure-Python kernel that is only slower.

One caveat about `[full]`: numba is the only extra that caps NumPy, and it raises that cap only once it supports a new NumPy minor, so in the weeks after a NumPy minor release `phonometry[full]` (like `phonometry[perf]`) can resolve one minor behind what a plain install gets. numba only makes the `impulse` time weighting faster, so install `phonometry[plot,report]` instead if you need the newest NumPy the day it ships.

Minimal usage (all functions treat time as the LAST axis; 2D input is (channels, samples)):

```python
import numpy as np
from phonometry import filters, signals

fs = 48000
x = np.random.randn(fs)              # 1 s of signal (pressure units)
bands = filters.octave_filter(x, fs, fraction=3)         # 1/3-octave bands
spl, freq = bands.levels, bands.frequencies
la = signals.laeq(x, fs)                                 # A-weighted Leq
stats = signals.ln_levels(x, fs, n=(10, 50, 90))         # statistical levels
```

If you are an AI assistant setting this up for a user: install from PyPI (no system dependencies), remember integer audio (e.g. wavfile.read int16) is handled automatically, use `calibration_factor` from `sensitivity()` for real dB SPL, and prefer `OctaveFilterBank` over repeated `octave_filter()` calls in tight loops (although designs are cached either way). The library computes standardized quantities; it is not a certified instrument and does not acquire data from hardware.

## Start here

- [Getting Started](https://docs.jmrp.io/phonometry/start/getting-started/)
- [Why phonometry](https://docs.jmrp.io/phonometry/start/why-phonometry/)
- [Upgrading from 3.3 to 4.0](https://docs.jmrp.io/phonometry/start/upgrading/)
- [About](https://docs.jmrp.io/phonometry/start/about/)
- [Support the project](https://docs.jmrp.io/phonometry/start/support/)
- [Guides index](https://docs.jmrp.io/phonometry/start/guides/)
- [Glossary of quantities](https://docs.jmrp.io/phonometry/reference/glossary/)

## Signal analysis

- [Overview](https://docs.jmrp.io/phonometry/signals/)
- [Build a sound level meter](https://docs.jmrp.io/phonometry/signals/sound-level-meter/)

### Octave filtering

- [Overview](https://docs.jmrp.io/phonometry/signals/filters/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-signals-filters.txt)
- [Filter Banks](https://docs.jmrp.io/phonometry/signals/filters/filter-banks/)
- [Filter Architecture Gallery](https://docs.jmrp.io/phonometry/signals/filters/filter-gallery/)
- [Filter class verification (IEC 61260-1)](https://docs.jmrp.io/phonometry/signals/filters/filter-compliance/)
- [Block Processing](https://docs.jmrp.io/phonometry/signals/filters/block-processing/)
- [Multichannel and Performance](https://docs.jmrp.io/phonometry/signals/filters/multichannel/)

### Levels and weighting

- [Overview](https://docs.jmrp.io/phonometry/signals/levels/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-signals-levels.txt)
- [Frequency Weighting (A, C, Z)](https://docs.jmrp.io/phonometry/signals/levels/weighting/)
- [Special Weightings (G, B, D, AU)](https://docs.jmrp.io/phonometry/signals/levels/special-weightings/)
- [Time Weighting and Integration](https://docs.jmrp.io/phonometry/signals/levels/time-weighting/)
- [Integrated and Statistical Levels](https://docs.jmrp.io/phonometry/signals/levels/levels/)

### Signals and spectra

- [Overview](https://docs.jmrp.io/phonometry/signals/spectra/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-signals-spectra.txt)
- [Calibrated spectral analysis (Bendat & Piersol)](https://docs.jmrp.io/phonometry/signals/spectra/spectral-analysis/)
- [Multiple and partial coherence (Bendat & Piersol)](https://docs.jmrp.io/phonometry/signals/spectra/miso-coherence/)
- [Time-frequency analysis](https://docs.jmrp.io/phonometry/signals/spectra/time-frequency/)
- [Cepstrum, echoes and the envelope spectrum (Havelock / Bendat & Piersol)](https://docs.jmrp.io/phonometry/signals/spectra/cepstrum-echoes/)
- [Time synchronous averaging (McFadden 1987)](https://docs.jmrp.io/phonometry/signals/spectra/synchronous-averaging/)
- [Correlation, time delay and envelope (Bendat & Piersol / Knapp & Carter)](https://docs.jmrp.io/phonometry/signals/spectra/correlation-delay/)
- [Test signals and sample-rate tools (IEC 60268-1)](https://docs.jmrp.io/phonometry/signals/spectra/test-signals/)
- [System measurement: Golay, shaped sweeps, inversion](https://docs.jmrp.io/phonometry/signals/spectra/system-measurement/)

### Calibration and uncertainty

- [Overview](https://docs.jmrp.io/phonometry/signals/metrology/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-signals-metrology.txt)
- [Calibration and dBFS](https://docs.jmrp.io/phonometry/signals/metrology/calibration/)
- [Measurement uncertainty (GUM and Monte Carlo)](https://docs.jmrp.io/phonometry/signals/metrology/gum-uncertainty/)
- [Compliance and verification](https://docs.jmrp.io/phonometry/signals/metrology/compliance-verification/)
- [Data qualification: stationarity, level crossings and peaks (Bendat & Piersol)](https://docs.jmrp.io/phonometry/signals/metrology/data-qualification/)
- [Random-incidence and diffuse-field response (IEC 61183)](https://docs.jmrp.io/phonometry/signals/metrology/random-incidence/)
- [Free-field corrections of a sound level meter (IEC 62585)](https://docs.jmrp.io/phonometry/signals/metrology/free-field-corrections/)
- [Periodic tests of a sound level meter (IEC 61672-3)](https://docs.jmrp.io/phonometry/signals/metrology/sound-level-meter-periodic-tests/)

### Microphone calibration (IEC 61094)

- [Overview](https://docs.jmrp.io/phonometry/signals/metrology/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-signals-metrology-microphones.txt)
- [Microphone calibration by comparison (IEC 61094-5 and IEC 61094-8)](https://docs.jmrp.io/phonometry/signals/metrology/comparison-calibration/)
- [Microphone calibration by reciprocity (IEC 61094-2 and IEC 61094-3)](https://docs.jmrp.io/phonometry/signals/metrology/reciprocity-calibration/)

## The medium

- [Overview](https://docs.jmrp.io/phonometry/fluids/)
- [Humid air](https://docs.jmrp.io/phonometry/fluids/humid-air/)

## Elastic solids

- [Overview](https://docs.jmrp.io/phonometry/solids/)
- [Wave speeds of a solid](https://docs.jmrp.io/phonometry/solids/wave-speeds/)

## Files

- [Overview](https://docs.jmrp.io/phonometry/io/)
- [Reading and writing measurement audio](https://docs.jmrp.io/phonometry/io/audio-files/)
- [Your own catalogues](https://docs.jmrp.io/phonometry/io/material-catalogues/)

## Hearing and perception

- [Overview](https://docs.jmrp.io/phonometry/perception/)

### Psychoacoustics

- [Overview](https://docs.jmrp.io/phonometry/perception/psychoacoustics/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-perception-psychoacoustics.txt)
- [Loudness](https://docs.jmrp.io/phonometry/perception/psychoacoustics/loudness/)
- [Advanced Loudness (ISO 532-2/-3, ECMA-418-2)](https://docs.jmrp.io/phonometry/perception/psychoacoustics/advanced-loudness/)
- [Sound Quality Metrics](https://docs.jmrp.io/phonometry/perception/psychoacoustics/sound-quality/)
- [Prominent Discrete Tones (ECMA-418-1)](https://docs.jmrp.io/phonometry/perception/psychoacoustics/tone-prominence/)
- [Objective audibility of tones in noise (ISO/PAS 20065)](https://docs.jmrp.io/phonometry/perception/psychoacoustics/tone-audibility/)
- [Psychoacoustic annoyance and fluctuation strength (Fastl & Zwicker)](https://docs.jmrp.io/phonometry/perception/psychoacoustics/psychoacoustic-annoyance/)

### Speech

- [Overview](https://docs.jmrp.io/phonometry/perception/speech/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-perception-speech.txt)
- [Speech Transmission Index (IEC 60268-16)](https://docs.jmrp.io/phonometry/perception/speech/speech-transmission/)
- [Speech Intelligibility Index (SII)](https://docs.jmrp.io/phonometry/perception/speech/speech-intelligibility/)
- [Objective intelligibility (STOI & ESTOI)](https://docs.jmrp.io/phonometry/perception/speech/objective-intelligibility/)

### Hearing and exposure

- [Overview](https://docs.jmrp.io/phonometry/perception/hearing/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-perception-hearing.txt)
- [Hearing threshold (age and reference zero)](https://docs.jmrp.io/phonometry/perception/hearing/hearing-threshold/)
- [Audiometric Test Methods (ISO 8253-1 and -2)](https://docs.jmrp.io/phonometry/perception/hearing/audiometry/)
- [Occupational Noise Exposure (ISO 9612)](https://docs.jmrp.io/phonometry/perception/hearing/occupational-exposure/)
- [Noise-induced hearing loss (ISO 1999)](https://docs.jmrp.io/phonometry/perception/hearing/noise-induced-hearing-loss/)
- [Hearing Protectors (ISO 4869-1, -2, -3 and -6)](https://docs.jmrp.io/phonometry/perception/hearing/hearing-protectors/)

## Rooms and buildings

- [Overview](https://docs.jmrp.io/phonometry/buildings/)

### Room acoustics

- [Overview](https://docs.jmrp.io/phonometry/buildings/rooms/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-buildings-rooms.txt)
- [Measuring the Room Impulse Response](https://docs.jmrp.io/phonometry/buildings/rooms/room-impulse-response/)
- [Room Acoustics](https://docs.jmrp.io/phonometry/buildings/rooms/room-acoustics/)
- [Open-Plan Office Acoustics (ISO 3382-3)](https://docs.jmrp.io/phonometry/buildings/rooms/open-plan-acoustics/)
- [Image sources and the steady-state room field (Kuttruff / Vorländer / Bies)](https://docs.jmrp.io/phonometry/buildings/rooms/room-image-sources/)
- [Spatial sound decay in workrooms (ISO 14257, ISO 11690-3)](https://docs.jmrp.io/phonometry/buildings/rooms/workroom-sound-decay/)
- [Room-noise criteria (NC / RC Mark II)](https://docs.jmrp.io/phonometry/buildings/rooms/room-noise/)
- [Reverberation-time prediction (Sabine · Eyring · Fitzroy · Arau-Puchades)](https://docs.jmrp.io/phonometry/buildings/rooms/reverberation-prediction/)
- [Sound absorption in enclosed spaces (EN 12354-6)](https://docs.jmrp.io/phonometry/buildings/rooms/enclosed-space-absorption/)

### Auditorium measures of the ISO 3382-1 annexes

- [Overview](https://docs.jmrp.io/phonometry/buildings/rooms/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-buildings-rooms-auditorium.txt)
- [Sound strength G (ISO 3382-1)](https://docs.jmrp.io/phonometry/buildings/rooms/sound-strength/)
- [Spatial impression (ISO 3382-1)](https://docs.jmrp.io/phonometry/buildings/rooms/spatial-impression/)
- [Stage support and uncertainty (ISO 3382-1)](https://docs.jmrp.io/phonometry/buildings/rooms/stage-and-uncertainty/)
- [Reporting and source qualification (ISO 3382-1)](https://docs.jmrp.io/phonometry/buildings/rooms/reporting-and-qualification/)

### Laboratory insulation measurement

- [Overview](https://docs.jmrp.io/phonometry/buildings/insulation/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-buildings-insulation-laboratory.txt)
- [Laboratory Insulation Measurement](https://docs.jmrp.io/phonometry/buildings/insulation/insulation-lab/)
- [Linings, Floor Coverings, Joints and Rain (ISO 10140-1)](https://docs.jmrp.io/phonometry/buildings/insulation/lab-application-rules/)
- [Sound Insulation by Intensity (ISO 15186)](https://docs.jmrp.io/phonometry/buildings/insulation/insulation-intensity/)
- [Laboratory Flanking Transmission (ISO 10848)](https://docs.jmrp.io/phonometry/buildings/insulation/flanking-lab/)

### Sound insulation

- [Overview](https://docs.jmrp.io/phonometry/buildings/insulation/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-buildings-insulation.txt)
- [Field Insulation Measurement (ISO 16283)](https://docs.jmrp.io/phonometry/buildings/insulation/insulation-field/)
- [Small Rooms: the ISO 16283 Low-Frequency Procedure](https://docs.jmrp.io/phonometry/buildings/insulation/low-frequency-procedure/)
- [Heavy and Soft Impact Sources (ISO 16283-2)](https://docs.jmrp.io/phonometry/buildings/insulation/heavy-impact-sources/)
- [Sound Insulation Survey Method (ISO 10052)](https://docs.jmrp.io/phonometry/buildings/insulation/insulation-survey/)
- [Service-Equipment and Activity Noise (ISO 16032)](https://docs.jmrp.io/phonometry/buildings/insulation/service-equipment-noise/)

### Insulation ratings and the envelope

- [Overview](https://docs.jmrp.io/phonometry/buildings/insulation/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-buildings-insulation-ratings.txt)
- [Insulation Ratings (ISO 717)](https://docs.jmrp.io/phonometry/buildings/insulation/insulation-ratings/)
- [Façade Sound Insulation](https://docs.jmrp.io/phonometry/buildings/insulation/facade-insulation/)
- [Spanish Building Code (CTE DB-HR)](https://docs.jmrp.io/phonometry/buildings/insulation/spanish-building-code/)

### Insulation design

- [Overview](https://docs.jmrp.io/phonometry/buildings/design/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-buildings-design.txt)
- [Predicting Sound Insulation (EN 12354)](https://docs.jmrp.io/phonometry/buildings/design/insulation-prediction/)
- [Detailed Per-Band Prediction (ISO 12354)](https://docs.jmrp.io/phonometry/buildings/design/detailed-prediction/)
- [Predicting Panel Sound Insulation (mass law, coincidence, double walls)](https://docs.jmrp.io/phonometry/buildings/design/panel-sound-insulation/)
- [Floor-Covering Impact Improvement (ISO 16251-1)](https://docs.jmrp.io/phonometry/buildings/design/impact-improvement/)
- [Predicting Resilient-Layer Performance](https://docs.jmrp.io/phonometry/buildings/design/resilient-layers/)
- [Structure-borne sound power of building equipment (EN 15657)](https://docs.jmrp.io/phonometry/buildings/design/structure-borne-power/)
- [Installed structure-borne sound from equipment (EN 12354-5)](https://docs.jmrp.io/phonometry/buildings/design/installed-structure-borne/)

## Materials and surfaces

- [Overview](https://docs.jmrp.io/phonometry/materials/)
- [Reading a material datasheet](https://docs.jmrp.io/phonometry/materials/reading-a-datasheet/)

### Absorbers

- [Overview](https://docs.jmrp.io/phonometry/materials/absorbers/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-materials-absorbers.txt)
- [Sound Absorption Measurement and Rating](https://docs.jmrp.io/phonometry/materials/absorbers/absorption-measurement/)
- [Suspended ceilings: the EN 16487 test code](https://docs.jmrp.io/phonometry/materials/absorbers/suspended-ceilings/)
- [Airflow Resistance](https://docs.jmrp.io/phonometry/materials/absorbers/airflow-resistance/)
- [Impedance Tube](https://docs.jmrp.io/phonometry/materials/absorbers/impedance-tube/)
- [Porous and Multilayer Absorbers](https://docs.jmrp.io/phonometry/materials/absorbers/porous-absorbers/)
- [Metamaterial Absorbers](https://docs.jmrp.io/phonometry/materials/absorbers/metamaterial-absorbers/)

### Diffusers and surfaces

- [Overview](https://docs.jmrp.io/phonometry/materials/diffusers/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-materials-diffusers.txt)
- [Diffusers and Their Coefficients](https://docs.jmrp.io/phonometry/materials/diffusers/diffusers/)
- [Metadiffusers](https://docs.jmrp.io/phonometry/materials/diffusers/metadiffusers/)

### Surfaces measured in place

- [Overview](https://docs.jmrp.io/phonometry/materials/surfaces/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-materials-surfaces.txt)
- [In-situ Road-Surface Absorption](https://docs.jmrp.io/phonometry/materials/surfaces/road-absorption/)

### Resilient layers

- [Overview](https://docs.jmrp.io/phonometry/materials/resilient/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-materials-resilient.txt)
- [Dynamic stiffness of resilient materials (EN 29052-1)](https://docs.jmrp.io/phonometry/materials/resilient/dynamic-stiffness/)

## Vibration and structure-borne sound

- [Overview](https://docs.jmrp.io/phonometry/vibration/)

### Structure-borne sources

- [Overview](https://docs.jmrp.io/phonometry/vibration/structural/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-vibration-structural.txt)
- [Mechanical mobility and the FRF family (ISO 7626-1)](https://docs.jmrp.io/phonometry/vibration/structural/mechanical-mobility/)
- [Mobility by impact excitation (ISO 7626-5)](https://docs.jmrp.io/phonometry/vibration/structural/impact-mobility/)
- [Bending-wave transmission at plate junctions (Cremer / Craik / Hopkins)](https://docs.jmrp.io/phonometry/vibration/structural/junction-transmission/)
- [Dynamic transfer stiffness of resilient elements (ISO 10846)](https://docs.jmrp.io/phonometry/vibration/structural/transfer-stiffness/)
- [Vibration damage to structures (DIN 4150-3)](https://docs.jmrp.io/phonometry/vibration/structural/structural-damage/)
- [Predicting a building's own frequency (ISO 4866)](https://docs.jmrp.io/phonometry/vibration/structural/building-response/)

### Human vibration

- [Overview](https://docs.jmrp.io/phonometry/vibration/human/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-vibration-human.txt)
- [Human Vibration: Whole-Body and Hand-Arm Exposure](https://docs.jmrp.io/phonometry/vibration/human/human-vibration/)
- [Multiple-shock whole-body vibration (ISO 2631-5)](https://docs.jmrp.io/phonometry/vibration/human/multiple-shock-vibration/)
- [What a seat does to the vibration (ISO 10326-1)](https://docs.jmrp.io/phonometry/vibration/human/seat-vibration/)
- [Verifying a human-vibration meter (ISO 8041-1)](https://docs.jmrp.io/phonometry/vibration/human/meter-verification/)

### Machinery

- [Overview](https://docs.jmrp.io/phonometry/vibration/machinery/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-vibration-machinery.txt)
- [Machine fault frequencies (Norton & Karczub)](https://docs.jmrp.io/phonometry/vibration/machinery/machine-diagnostics/)
- [Evaluating machine vibration (ISO 20816-1)](https://docs.jmrp.io/phonometry/vibration/machinery/machine-vibration-evaluation/)

### Vibration immission

- [Overview](https://docs.jmrp.io/phonometry/vibration/immission/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-vibration-immission.txt)
- [Measuring vibration immission (DIN 45669-1)](https://docs.jmrp.io/phonometry/vibration/immission/vibration-meter/)
- [Vibration next to a railway (DIN 45672)](https://docs.jmrp.io/phonometry/vibration/immission/railway-vibration/)
- [Vibration and people in buildings (DIN 4150-2)](https://docs.jmrp.io/phonometry/vibration/immission/people-in-buildings/)
- [Railway vibration by category of train (E DIN 4150-2)](https://docs.jmrp.io/phonometry/vibration/immission/railway-categories/)
- [Predicting railway vibration (E DIN 45672-3)](https://docs.jmrp.io/phonometry/vibration/immission/railway-prediction/)
- [Predicting vibration before measuring (DIN 4150-1)](https://docs.jmrp.io/phonometry/vibration/immission/vibration-prediction/)

## Environment and transport

- [Overview](https://docs.jmrp.io/phonometry/environment/)

### Assessment and regulation

- [Overview](https://docs.jmrp.io/phonometry/environment/assessment/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-environment-assessment.txt)
- [Environmental Levels (ISO 1996-1/-2)](https://docs.jmrp.io/phonometry/environment/assessment/environmental-levels/)
- [Impulsive-sound prominence (NT ACOU 112)](https://docs.jmrp.io/phonometry/environment/assessment/impulsive-sound/)
- [Spanish Noise Regulation (RD 1367/2007)](https://docs.jmrp.io/phonometry/environment/assessment/spanish-noise-regulation/)
- [Impulsive sound exposure statistics (ISO 13474)](https://docs.jmrp.io/phonometry/environment/assessment/sel-distribution/)
- [Soundscape analysis (ISO/TS 12913)](https://docs.jmrp.io/phonometry/environment/assessment/soundscape/)

### Outdoor sound

- [Overview](https://docs.jmrp.io/phonometry/environment/propagation/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-environment-propagation.txt)
- [Outdoor Sound Propagation](https://docs.jmrp.io/phonometry/environment/propagation/outdoor-propagation/)
- [Spherical ground effect and advanced barriers (Attenborough / Salomons / Bies)](https://docs.jmrp.io/phonometry/environment/propagation/ground-barriers/)
- [Atmospheric refraction: ray tracing and the parabolic equation (Salomons / Attenborough)](https://docs.jmrp.io/phonometry/environment/propagation/atmospheric-refraction/)
- [Sound reflection of a noise barrier in situ (EN 1793-5)](https://docs.jmrp.io/phonometry/environment/propagation/barrier-reflection/)
- [Quality of outdoor sound software (ISO 17534-1)](https://docs.jmrp.io/phonometry/environment/propagation/software-quality/)

### Environmental sources

- [Overview](https://docs.jmrp.io/phonometry/environment/sources/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-environment-sources.txt)
- [CNOSSOS-EU road traffic source emission](https://docs.jmrp.io/phonometry/environment/sources/cnossos-road-emission/)
- [CNOSSOS-EU railway source emission](https://docs.jmrp.io/phonometry/environment/sources/cnossos-rail-emission/)
- [Railway rolling-stock noise: the ISO 3095 type test](https://docs.jmrp.io/phonometry/environment/sources/rolling-stock-noise/)
- [Road-surface noise: the statistical pass-by method (ISO 11819-1)](https://docs.jmrp.io/phonometry/environment/sources/road-surface-pass-by/)
- [Wind-turbine noise: apparent sound power and tonal audibility (IEC 61400-11)](https://docs.jmrp.io/phonometry/environment/sources/wind-turbine-noise/)
- [Wind turbine sound at a dwelling (IEC TS 61400-11-2)](https://docs.jmrp.io/phonometry/environment/sources/wind-turbine-receptor/)

## Aircraft noise

- [Overview](https://docs.jmrp.io/phonometry/aircraft/)
- [Aircraft noise: Effective Perceived Noise Level (ICAO Annex 16 / IEC 61265)](https://docs.jmrp.io/phonometry/aircraft/aircraft-noise/)
- [Airport noise (ECAC Doc 29)](https://docs.jmrp.io/phonometry/aircraft/airport-noise/)
- [Rotorcraft noise: the hemisphere method (ECAC Doc 32 / NORAH2)](https://docs.jmrp.io/phonometry/aircraft/rotorcraft-noise/)
- [The ANP fleet database](https://docs.jmrp.io/phonometry/aircraft/anp-fleet/)
- [NPD data for the air at the airport](https://docs.jmrp.io/phonometry/aircraft/npd-atmosphere/)

## Underwater acoustics

- [Overview](https://docs.jmrp.io/phonometry/underwater/)
- [Underwater acoustics: radiated noise and pile driving (ISO 18405 / 17208 / 18406)](https://docs.jmrp.io/phonometry/underwater/underwater-acoustics/)
- [Underwater sound propagation: propagation loss, sound speed, sonar, seabed and ambient noise](https://docs.jmrp.io/phonometry/underwater/underwater-propagation/)
- [Underwater propagation solvers: modes, rays, beams and the parabolic equation](https://docs.jmrp.io/phonometry/underwater/underwater-solvers/)
- [Marine-mammal noise exposure: audiograms, auditory weighting and injury criteria](https://docs.jmrp.io/phonometry/underwater/marine-mammal-exposure/)

## Sources and devices

- [Overview](https://docs.jmrp.io/phonometry/devices/)

### Sound power and intensity

- [Overview](https://docs.jmrp.io/phonometry/devices/emission/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-devices-emission.txt)
- [Sound Power](https://docs.jmrp.io/phonometry/devices/emission/sound-power/)
- [Sound Power in a Duct (ISO 5136)](https://docs.jmrp.io/phonometry/devices/emission/sound-power-in-duct/)
- [Sound Power of Multisource Industrial Plants (ISO 8297)](https://docs.jmrp.io/phonometry/devices/emission/sound-power-plant/)
- [Sound power from surface vibration (ISO/TS 7849)](https://docs.jmrp.io/phonometry/devices/emission/vibration-sound-power/)
- [Emission Sound Pressure at a Work Station (ISO 11200 group)](https://docs.jmrp.io/phonometry/devices/emission/workstation-emission/)

### Sound power on an enveloping surface

- [Overview](https://docs.jmrp.io/phonometry/devices/emission/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-devices-emission-enveloping.txt)
- [Sound Power by Pressure Methods (ISO 3744 / ISO 3746 / ISO 3745)](https://docs.jmrp.io/phonometry/devices/emission/sound-power-pressure/)
- [Free Field and Reference Sources (ISO 26101 / ISO 6926)](https://docs.jmrp.io/phonometry/devices/emission/free-field-qualification/)
- [Sound Power of Steam Turbine Sets (IEC 61063)](https://docs.jmrp.io/phonometry/devices/emission/sound-power-turbines/)

### Sound power in a reverberant field

- [Overview](https://docs.jmrp.io/phonometry/devices/emission/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-devices-emission-reverberant.txt)
- [Sound Power in the Reverberation Room (ISO 3741)](https://docs.jmrp.io/phonometry/devices/emission/sound-power-reverberation/)
- [Sound Power in Small Test Rooms (ISO 3743)](https://docs.jmrp.io/phonometry/devices/emission/sound-power-test-rooms/)
- [Sound Power in Situ by Comparison (ISO 3747)](https://docs.jmrp.io/phonometry/devices/emission/sound-power-in-situ/)
- [Sound Power in the 16 kHz Octave (ISO 9295)](https://docs.jmrp.io/phonometry/devices/emission/sound-power-high-frequency/)

### Sound intensity and sound power from it

- [Overview](https://docs.jmrp.io/phonometry/devices/emission/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-devices-emission-intensity.txt)
- [Sound Power by Intensity Scanning (ISO 9614-2 / ISO 9614-3)](https://docs.jmrp.io/phonometry/devices/emission/sound-power-intensity/)
- [Sound Intensity (p-p method)](https://docs.jmrp.io/phonometry/devices/emission/intensity/)

### Electroacoustics

- [Overview](https://docs.jmrp.io/phonometry/devices/electroacoustics/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-devices-electroacoustics.txt)
- [Electroacoustics: distortion and frequency response (IEC 60268-3 / Bendat & Piersol)](https://docs.jmrp.io/phonometry/devices/electroacoustics/electroacoustics/)
- [Loudspeaker Characterisation (IEC 60268-5)](https://docs.jmrp.io/phonometry/devices/electroacoustics/loudspeakers/)
- [Microphone Characterisation (IEC 60268-4)](https://docs.jmrp.io/phonometry/devices/electroacoustics/microphones/)
- [Swept-sine distortion and phase utilities (Farina / Novak)](https://docs.jmrp.io/phonometry/devices/electroacoustics/swept-sine-distortion/)
- [Audio-Frequency Induction Loops (IEC 60118-4)](https://docs.jmrp.io/phonometry/devices/electroacoustics/induction-loops/)
- [Headphones and Earphones (IEC 60268-7)](https://docs.jmrp.io/phonometry/devices/electroacoustics/headphones/)

### Broadcast

- [Overview](https://docs.jmrp.io/phonometry/devices/broadcast/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-devices-broadcast.txt)
- [Programme loudness and true peak (ITU-R BS.1770 / EBU R 128)](https://docs.jmrp.io/phonometry/devices/broadcast/program-loudness/)
- [Quasi-peak programme meter (ITU-R BS.468-4)](https://docs.jmrp.io/phonometry/devices/broadcast/quasi-peak/)

### Noise control

- [Overview](https://docs.jmrp.io/phonometry/devices/noise-control/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-devices-noise-control.txt)
- [Duct-borne noise: fan to room](https://docs.jmrp.io/phonometry/devices/noise-control/duct-path/)
- [Room to room: partition, receiving room, criterion](https://docs.jmrp.io/phonometry/devices/noise-control/room-to-room/)
- [Silencers](https://docs.jmrp.io/phonometry/devices/noise-control/silencers/)
- [Industrial noise control: HVAC and enclosures](https://docs.jmrp.io/phonometry/devices/noise-control/noise-control/)
- [HVAC noise the German way (VDI 2081)](https://docs.jmrp.io/phonometry/devices/noise-control/vdi2081-air-systems/)

### Measuring a device that is already built

- [Overview](https://docs.jmrp.io/phonometry/devices/noise-control/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-devices-noise-control-measured.txt)
- [Measuring a silencer (ISO 7235 and ISO 11691)](https://docs.jmrp.io/phonometry/devices/noise-control/silencer-measurement/)
- [Enclosures and cabins measured (ISO 11546, ISO 11957)](https://docs.jmrp.io/phonometry/devices/noise-control/enclosure-cabin-insulation/)
- [Silencers, screens and barriers in situ (ISO 11820, ISO 11821, ISO 10847)](https://docs.jmrp.io/phonometry/devices/noise-control/in-situ-noise-control/)

### Control valve noise (IEC 60534-8)

- [Overview](https://docs.jmrp.io/phonometry/devices/noise-control/) · [full text](https://docs.jmrp.io/phonometry/llms/llms-devices-noise-control-valves.txt)
- [Control valve noise (IEC 60534-8-3)](https://docs.jmrp.io/phonometry/devices/noise-control/control-valve-noise/)
- [Hydrodynamic valve noise (IEC 60534-8-4)](https://docs.jmrp.io/phonometry/devices/noise-control/valve-cavitation/)

## Wave simulation

- [Overview](https://docs.jmrp.io/phonometry/simulation/)
- [2D FDTD wave simulation](https://docs.jmrp.io/phonometry/simulation/fdtd-simulation/)
- [Elastic waves and fluid-solid coupling](https://docs.jmrp.io/phonometry/simulation/elastic-waves/)

## Theory and reference

The theory pages travel in their own shard (https://docs.jmrp.io/phonometry/llms/llms-theory.txt), the glossary in another (https://docs.jmrp.io/phonometry/llms/llms-glossary.txt), and the rest of the reference in https://docs.jmrp.io/phonometry/llms/llms-reference.txt.

- [API Reference](https://docs.jmrp.io/phonometry/reference/api/)
- [Bibliography](https://docs.jmrp.io/phonometry/reference/bibliography/)
- [Same bits on every machine](https://docs.jmrp.io/phonometry/reference/determinism/)
- [Glossary](https://docs.jmrp.io/phonometry/reference/glossary/)
- [Theoretical Background](https://docs.jmrp.io/phonometry/reference/theory/)
- [Theory: Environment and Transport](https://docs.jmrp.io/phonometry/reference/theory/environment-transport/)
- [Theory: Materials and Surfaces](https://docs.jmrp.io/phonometry/reference/theory/materials-surfaces/)
- [Theory: Perception and Hearing](https://docs.jmrp.io/phonometry/reference/theory/perception/)
- [Theory: Rooms and Buildings](https://docs.jmrp.io/phonometry/reference/theory/rooms-buildings/)
- [Theory: Signal Analysis](https://docs.jmrp.io/phonometry/reference/theory/signal-analysis/)
- [Theory: Vibration](https://docs.jmrp.io/phonometry/reference/theory/vibration/)

## Evidence and provenance

- [Conformance report](https://docs.jmrp.io/phonometry/reference/conformance/): every check, with the standard, the clause, the normative expected value, the value the library computes and the delta
- [Errata in published sources](https://docs.jmrp.io/phonometry/reference/errata/): defects found in published standards, each re-derived from that standard's own normative clauses
- [Published catalogues](https://docs.jmrp.io/phonometry/reference/catalogues/): every value this library read off a printed page, with the book, the table and the page it came from, and what the page printed where a number is missing
- [Report fiches](https://docs.jmrp.io/phonometry/reference/reports/): every PDF fiche the library renders, in the reporting format its standard defines, with the guide that explains the measurement behind each one
- [Bibliography](https://docs.jmrp.io/phonometry/reference/bibliography/)
- [About the author and the method](https://docs.jmrp.io/phonometry/start/about/)

## Source and metadata

- [Repository](https://github.com/jmrplens/phonometry)
- [PyPI](https://pypi.org/project/phonometry/)
- [Changelog](https://github.com/jmrplens/phonometry/blob/main/CHANGELOG.md)
- [Cite this software](https://github.com/jmrplens/phonometry/blob/main/CITATION.cff)
- [Archived release (DOI)](https://doi.org/10.5281/zenodo.21215280)
- [Licence: MIT](https://opensource.org/licenses/MIT)

## Full text

One file per area, each small enough to fetch whole. `llms-full.txt` is the complete concatenation and is far too large for a single fetch in most clients.

- [Start here](https://docs.jmrp.io/phonometry/llms/llms-start.txt)
- [Theory and reference](https://docs.jmrp.io/phonometry/llms/llms-theory.txt)
- [Signal analysis](https://docs.jmrp.io/phonometry/llms/llms-signals.txt)
- [Octave filtering](https://docs.jmrp.io/phonometry/llms/llms-signals-filters.txt)
- [Levels and weighting](https://docs.jmrp.io/phonometry/llms/llms-signals-levels.txt)
- [Signals and spectra](https://docs.jmrp.io/phonometry/llms/llms-signals-spectra.txt)
- [Calibration and uncertainty](https://docs.jmrp.io/phonometry/llms/llms-signals-metrology.txt)
- [Microphone calibration (IEC 61094)](https://docs.jmrp.io/phonometry/llms/llms-signals-metrology-microphones.txt)
- [The medium](https://docs.jmrp.io/phonometry/llms/llms-fluids.txt)
- [Elastic solids](https://docs.jmrp.io/phonometry/llms/llms-solids.txt)
- [Files](https://docs.jmrp.io/phonometry/llms/llms-io.txt)
- [Hearing and perception](https://docs.jmrp.io/phonometry/llms/llms-perception.txt)
- [Psychoacoustics](https://docs.jmrp.io/phonometry/llms/llms-perception-psychoacoustics.txt)
- [Speech](https://docs.jmrp.io/phonometry/llms/llms-perception-speech.txt)
- [Hearing and exposure](https://docs.jmrp.io/phonometry/llms/llms-perception-hearing.txt)
- [Rooms and buildings](https://docs.jmrp.io/phonometry/llms/llms-buildings.txt)
- [Room acoustics](https://docs.jmrp.io/phonometry/llms/llms-buildings-rooms.txt)
- [Auditorium measures of the ISO 3382-1 annexes](https://docs.jmrp.io/phonometry/llms/llms-buildings-rooms-auditorium.txt)
- [Sound insulation](https://docs.jmrp.io/phonometry/llms/llms-buildings-insulation.txt)
- [Laboratory insulation measurement](https://docs.jmrp.io/phonometry/llms/llms-buildings-insulation-laboratory.txt)
- [Insulation ratings and the envelope](https://docs.jmrp.io/phonometry/llms/llms-buildings-insulation-ratings.txt)
- [Insulation design](https://docs.jmrp.io/phonometry/llms/llms-buildings-design.txt)
- [Materials and surfaces](https://docs.jmrp.io/phonometry/llms/llms-materials.txt)
- [Absorbers](https://docs.jmrp.io/phonometry/llms/llms-materials-absorbers.txt)
- [Diffusers and surfaces](https://docs.jmrp.io/phonometry/llms/llms-materials-diffusers.txt)
- [Surfaces measured in place](https://docs.jmrp.io/phonometry/llms/llms-materials-surfaces.txt)
- [Resilient layers](https://docs.jmrp.io/phonometry/llms/llms-materials-resilient.txt)
- [Vibration and structure-borne sound](https://docs.jmrp.io/phonometry/llms/llms-vibration.txt)
- [Structure-borne sources](https://docs.jmrp.io/phonometry/llms/llms-vibration-structural.txt)
- [Human vibration](https://docs.jmrp.io/phonometry/llms/llms-vibration-human.txt)
- [Machinery](https://docs.jmrp.io/phonometry/llms/llms-vibration-machinery.txt)
- [Vibration immission](https://docs.jmrp.io/phonometry/llms/llms-vibration-immission.txt)
- [Environment and transport](https://docs.jmrp.io/phonometry/llms/llms-environment.txt)
- [Assessment and regulation](https://docs.jmrp.io/phonometry/llms/llms-environment-assessment.txt)
- [Outdoor sound](https://docs.jmrp.io/phonometry/llms/llms-environment-propagation.txt)
- [Environmental sources](https://docs.jmrp.io/phonometry/llms/llms-environment-sources.txt)
- [Aircraft noise](https://docs.jmrp.io/phonometry/llms/llms-aircraft.txt)
- [Underwater acoustics](https://docs.jmrp.io/phonometry/llms/llms-underwater.txt)
- [Sources and devices](https://docs.jmrp.io/phonometry/llms/llms-devices.txt)
- [Sound power and intensity](https://docs.jmrp.io/phonometry/llms/llms-devices-emission.txt)
- [Sound power on an enveloping surface](https://docs.jmrp.io/phonometry/llms/llms-devices-emission-enveloping.txt)
- [Sound intensity and sound power from it](https://docs.jmrp.io/phonometry/llms/llms-devices-emission-intensity.txt)
- [Sound power in a reverberant field](https://docs.jmrp.io/phonometry/llms/llms-devices-emission-reverberant.txt)
- [Electroacoustics](https://docs.jmrp.io/phonometry/llms/llms-devices-electroacoustics.txt)
- [Broadcast](https://docs.jmrp.io/phonometry/llms/llms-devices-broadcast.txt)
- [Noise control](https://docs.jmrp.io/phonometry/llms/llms-devices-noise-control.txt)
- [Measuring a device that is already built](https://docs.jmrp.io/phonometry/llms/llms-devices-noise-control-measured.txt)
- [Control valve noise (IEC 60534-8)](https://docs.jmrp.io/phonometry/llms/llms-devices-noise-control-valves.txt)
- [Wave simulation](https://docs.jmrp.io/phonometry/llms/llms-simulation.txt)
- [Reference](https://docs.jmrp.io/phonometry/llms/llms-reference.txt)
- [Glossary](https://docs.jmrp.io/phonometry/llms/llms-glossary.txt)
- [Everything](https://docs.jmrp.io/phonometry/llms-full.txt)

## Spanish

Every page above also exists in Spanish under the `/es/` prefix, for example https://docs.jmrp.io/phonometry/es/start/getting-started/. The two trees are kept at parity by a build check.

## Optional

The generated API reference, one page per module. Fetch these only when a specific signature is needed; the guides above explain the same functions in context.

- [API reference index](https://docs.jmrp.io/phonometry/reference/api/)
- [aeroacoustics/airport-noise](https://docs.jmrp.io/phonometry/reference/api/aeroacoustics/airport-noise/)
- [aeroacoustics/anp-fleet](https://docs.jmrp.io/phonometry/reference/api/aeroacoustics/anp-fleet/)
- [aeroacoustics/atmospheric-absorption](https://docs.jmrp.io/phonometry/reference/api/aeroacoustics/atmospheric-absorption/)
- [aeroacoustics/certification](https://docs.jmrp.io/phonometry/reference/api/aeroacoustics/certification/)
- [aeroacoustics/flight-performance](https://docs.jmrp.io/phonometry/reference/api/aeroacoustics/flight-performance/)
- [aeroacoustics/measurement-system](https://docs.jmrp.io/phonometry/reference/api/aeroacoustics/measurement-system/)
- [aeroacoustics/npd-atmosphere](https://docs.jmrp.io/phonometry/reference/api/aeroacoustics/npd-atmosphere/)
- [aeroacoustics/rotorcraft-noise](https://docs.jmrp.io/phonometry/reference/api/aeroacoustics/rotorcraft-noise/)
- [aeroacoustics/rotorcraft-propagation](https://docs.jmrp.io/phonometry/reference/api/aeroacoustics/rotorcraft-propagation/)
- [broadcast/program-loudness](https://docs.jmrp.io/phonometry/reference/api/broadcast/program-loudness/)
- [broadcast/quasi-peak](https://docs.jmrp.io/phonometry/reference/api/broadcast/quasi-peak/)
- [building/aperture-transmission](https://docs.jmrp.io/phonometry/reference/api/building/aperture-transmission/)
- [building/catalogue](https://docs.jmrp.io/phonometry/reference/api/building/catalogue/)
- [building/ceiling-plenum](https://docs.jmrp.io/phonometry/reference/api/building/ceiling-plenum/)
- [building/datasheets](https://docs.jmrp.io/phonometry/reference/api/building/datasheets/)
- [building/detailed-model](https://docs.jmrp.io/phonometry/reference/api/building/detailed-model/)
- [building/facade](https://docs.jmrp.io/phonometry/reference/api/building/facade/)
- [building/flanking-transmission](https://docs.jmrp.io/phonometry/reference/api/building/flanking-transmission/)
- [building/floor-covering-improvement](https://docs.jmrp.io/phonometry/reference/api/building/floor-covering-improvement/)
- [building/heavy-impact](https://docs.jmrp.io/phonometry/reference/api/building/heavy-impact/)
- [building/impact-catalogue](https://docs.jmrp.io/phonometry/reference/api/building/impact-catalogue/)
- [building/installed-structure-borne](https://docs.jmrp.io/phonometry/reference/api/building/installed-structure-borne/)
- [building/insulation](https://docs.jmrp.io/phonometry/reference/api/building/insulation/)
- [building/intensity-insulation](https://docs.jmrp.io/phonometry/reference/api/building/intensity-insulation/)
- [building/joint-insulation](https://docs.jmrp.io/phonometry/reference/api/building/joint-insulation/)
- [building/lab-improvement](https://docs.jmrp.io/phonometry/reference/api/building/lab-improvement/)
- [building/lab-insulation](https://docs.jmrp.io/phonometry/reference/api/building/lab-insulation/)
- [building/linings](https://docs.jmrp.io/phonometry/reference/api/building/linings/)
- [building/low-frequency](https://docs.jmrp.io/phonometry/reference/api/building/low-frequency/)
- [building/masonry-cavity-wall](https://docs.jmrp.io/phonometry/reference/api/building/masonry-cavity-wall/)
- [building/panel-transmission](https://docs.jmrp.io/phonometry/reference/api/building/panel-transmission/)
- [building/rainfall-sound](https://docs.jmrp.io/phonometry/reference/api/building/rainfall-sound/)
- [building/ratings](https://docs.jmrp.io/phonometry/reference/api/building/ratings/)
- [building/resilient-layers](https://docs.jmrp.io/phonometry/reference/api/building/resilient-layers/)
- [building/service-equipment](https://docs.jmrp.io/phonometry/reference/api/building/service-equipment/)
- [building/simplified-model](https://docs.jmrp.io/phonometry/reference/api/building/simplified-model/)
- [building/spain](https://docs.jmrp.io/phonometry/reference/api/building/spain/)
- [building/structure-borne-power](https://docs.jmrp.io/phonometry/reference/api/building/structure-borne-power/)
- [building/survey-insulation](https://docs.jmrp.io/phonometry/reference/api/building/survey-insulation/)
- [building/uncertainty](https://docs.jmrp.io/phonometry/reference/api/building/uncertainty/)
- [electroacoustics/distortion](https://docs.jmrp.io/phonometry/reference/api/electroacoustics/distortion/)
- [electroacoustics/frequency-response](https://docs.jmrp.io/phonometry/reference/api/electroacoustics/frequency-response/)
- [electroacoustics/headphones](https://docs.jmrp.io/phonometry/reference/api/electroacoustics/headphones/)
- [electroacoustics/induction-loop](https://docs.jmrp.io/phonometry/reference/api/electroacoustics/induction-loop/)
- [electroacoustics/induction-loop-components](https://docs.jmrp.io/phonometry/reference/api/electroacoustics/induction-loop-components/)
- [electroacoustics/intermodulation](https://docs.jmrp.io/phonometry/reference/api/electroacoustics/intermodulation/)
- [electroacoustics/loudspeaker](https://docs.jmrp.io/phonometry/reference/api/electroacoustics/loudspeaker/)
- [electroacoustics/microphone](https://docs.jmrp.io/phonometry/reference/api/electroacoustics/microphone/)
- [electroacoustics/noise-measurements](https://docs.jmrp.io/phonometry/reference/api/electroacoustics/noise-measurements/)
- [electroacoustics/piston](https://docs.jmrp.io/phonometry/reference/api/electroacoustics/piston/)
- [electroacoustics/programme-signal](https://docs.jmrp.io/phonometry/reference/api/electroacoustics/programme-signal/)
- [electroacoustics/sound-reinforcement](https://docs.jmrp.io/phonometry/reference/api/electroacoustics/sound-reinforcement/)
- [electroacoustics/swept-sine](https://docs.jmrp.io/phonometry/reference/api/electroacoustics/swept-sine/)
- [environment/acoustic-roughness](https://docs.jmrp.io/phonometry/reference/api/environment/acoustic-roughness/)
- [environment/air-absorption](https://docs.jmrp.io/phonometry/reference/api/environment/air-absorption/)
- [environment/barrier-in-situ](https://docs.jmrp.io/phonometry/reference/api/environment/barrier-in-situ/)
- [environment/barrier-reflection](https://docs.jmrp.io/phonometry/reference/api/environment/barrier-reflection/)
- [environment/cnossos-rail](https://docs.jmrp.io/phonometry/reference/api/environment/cnossos-rail/)
- [environment/cnossos-road](https://docs.jmrp.io/phonometry/reference/api/environment/cnossos-road/)
- [environment/exposure-distribution](https://docs.jmrp.io/phonometry/reference/api/environment/exposure-distribution/)
- [environment/ground-barriers](https://docs.jmrp.io/phonometry/reference/api/environment/ground-barriers/)
- [environment/ground-surfaces](https://docs.jmrp.io/phonometry/reference/api/environment/ground-surfaces/)
- [environment/impulsive-sound](https://docs.jmrp.io/phonometry/reference/api/environment/impulsive-sound/)
- [environment/measurement](https://docs.jmrp.io/phonometry/reference/api/environment/measurement/)
- [environment/noise-reducing-devices](https://docs.jmrp.io/phonometry/reference/api/environment/noise-reducing-devices/)
- [environment/outdoor-propagation](https://docs.jmrp.io/phonometry/reference/api/environment/outdoor-propagation/)
- [environment/rating](https://docs.jmrp.io/phonometry/reference/api/environment/rating/)
- [environment/refraction](https://docs.jmrp.io/phonometry/reference/api/environment/refraction/)
- [environment/rolling-stock-noise](https://docs.jmrp.io/phonometry/reference/api/environment/rolling-stock-noise/)
- [environment/software-quality](https://docs.jmrp.io/phonometry/reference/api/environment/software-quality/)
- [environment/soundscape](https://docs.jmrp.io/phonometry/reference/api/environment/soundscape/)
- [environment/soundscape-binaural](https://docs.jmrp.io/phonometry/reference/api/environment/soundscape-binaural/)
- [environment/spain](https://docs.jmrp.io/phonometry/reference/api/environment/spain/)
- [environment/statistical-pass-by](https://docs.jmrp.io/phonometry/reference/api/environment/statistical-pass-by/)
- [environment/track-decay](https://docs.jmrp.io/phonometry/reference/api/environment/track-decay/)
- [environment/wind-turbine](https://docs.jmrp.io/phonometry/reference/api/environment/wind-turbine/)
- [environment/wind-turbine-modulation](https://docs.jmrp.io/phonometry/reference/api/environment/wind-turbine-modulation/)
- [environment/wind-turbine-receptor](https://docs.jmrp.io/phonometry/reference/api/environment/wind-turbine-receptor/)
- [filters/compliance](https://docs.jmrp.io/phonometry/reference/api/filters/compliance/)
- [filters/core](https://docs.jmrp.io/phonometry/reference/api/filters/core/)
- [filters/equalizer](https://docs.jmrp.io/phonometry/reference/api/filters/equalizer/)
- [filters/frequencies](https://docs.jmrp.io/phonometry/reference/api/filters/frequencies/)
- [filters/periodic-tests](https://docs.jmrp.io/phonometry/reference/api/filters/periodic-tests/)
- [filters/phonometry](https://docs.jmrp.io/phonometry/reference/api/filters/phonometry/)
- [filters/time-invariance](https://docs.jmrp.io/phonometry/reference/api/filters/time-invariance/)
- [filters/weighting](https://docs.jmrp.io/phonometry/reference/api/filters/weighting/)
- [filters/weighting-compliance](https://docs.jmrp.io/phonometry/reference/api/filters/weighting-compliance/)
- [fluids/air](https://docs.jmrp.io/phonometry/reference/api/fluids/air/)
- [fluids/catalogue](https://docs.jmrp.io/phonometry/reference/api/fluids/catalogue/)
- [fluids/fluids](https://docs.jmrp.io/phonometry/reference/api/fluids/fluids/)
- [fluids/gas](https://docs.jmrp.io/phonometry/reference/api/fluids/gas/)
- [fluids/nonlinearity](https://docs.jmrp.io/phonometry/reference/api/fluids/nonlinearity/)
- [fluids/water](https://docs.jmrp.io/phonometry/reference/api/fluids/water/)
- [hearing/active-noise-reduction](https://docs.jmrp.io/phonometry/reference/api/hearing/active-noise-reduction/)
- [hearing/audiometry](https://docs.jmrp.io/phonometry/reference/api/hearing/audiometry/)
- [hearing/earmuff-insertion-loss](https://docs.jmrp.io/phonometry/reference/api/hearing/earmuff-insertion-loss/)
- [hearing/hearing-protectors](https://docs.jmrp.io/phonometry/reference/api/hearing/hearing-protectors/)
- [hearing/noise-induced-hearing-loss](https://docs.jmrp.io/phonometry/reference/api/hearing/noise-induced-hearing-loss/)
- [hearing/occupational-exposure](https://docs.jmrp.io/phonometry/reference/api/hearing/occupational-exposure/)
- [hearing/real-ear-attenuation](https://docs.jmrp.io/phonometry/reference/api/hearing/real-ear-attenuation/)
- [hearing/sound-field-audiometry](https://docs.jmrp.io/phonometry/reference/api/hearing/sound-field-audiometry/)
- [hearing/threshold](https://docs.jmrp.io/phonometry/reference/api/hearing/threshold/)
- [io/io](https://docs.jmrp.io/phonometry/reference/api/io/io/)
- [materials/airflow-resistance](https://docs.jmrp.io/phonometry/reference/api/materials/airflow-resistance/)
- [materials/biot](https://docs.jmrp.io/phonometry/reference/api/materials/biot/)
- [materials/carpets](https://docs.jmrp.io/phonometry/reference/api/materials/carpets/)
- [materials/catalogue](https://docs.jmrp.io/phonometry/reference/api/materials/catalogue/)
- [materials/datasheets](https://docs.jmrp.io/phonometry/reference/api/materials/datasheets/)
- [materials/design](https://docs.jmrp.io/phonometry/reference/api/materials/design/)
- [materials/dynamic-stiffness](https://docs.jmrp.io/phonometry/reference/api/materials/dynamic-stiffness/)
- [materials/four-microphone](https://docs.jmrp.io/phonometry/reference/api/materials/four-microphone/)
- [materials/impedance-tube](https://docs.jmrp.io/phonometry/reference/api/materials/impedance-tube/)
- [materials/layered](https://docs.jmrp.io/phonometry/reference/api/materials/layered/)
- [materials/measured](https://docs.jmrp.io/phonometry/reference/api/materials/measured/)
- [materials/measured-scattering](https://docs.jmrp.io/phonometry/reference/api/materials/measured-scattering/)
- [materials/metadiffuser](https://docs.jmrp.io/phonometry/reference/api/materials/metadiffuser/)
- [materials/moduli](https://docs.jmrp.io/phonometry/reference/api/materials/moduli/)
- [materials/porous](https://docs.jmrp.io/phonometry/reference/api/materials/porous/)
- [materials/predicted-diffusion](https://docs.jmrp.io/phonometry/reference/api/materials/predicted-diffusion/)
- [materials/predicted-scattering](https://docs.jmrp.io/phonometry/reference/api/materials/predicted-scattering/)
- [materials/rating](https://docs.jmrp.io/phonometry/reference/api/materials/rating/)
- [materials/resistive-sheets](https://docs.jmrp.io/phonometry/reference/api/materials/resistive-sheets/)
- [materials/reverberation-room-scattering](https://docs.jmrp.io/phonometry/reference/api/materials/reverberation-room-scattering/)
- [materials/road-absorption](https://docs.jmrp.io/phonometry/reference/api/materials/road-absorption/)
- [materials/scattering-diffusion](https://docs.jmrp.io/phonometry/reference/api/materials/scattering-diffusion/)
- [materials/slow-sound](https://docs.jmrp.io/phonometry/reference/api/materials/slow-sound/)
- [materials/sound-absorption](https://docs.jmrp.io/phonometry/reference/api/materials/sound-absorption/)
- [materials/standing-wave](https://docs.jmrp.io/phonometry/reference/api/materials/standing-wave/)
- [materials/suspended-ceilings](https://docs.jmrp.io/phonometry/reference/api/materials/suspended-ceilings/)
- [materials/uncertainty](https://docs.jmrp.io/phonometry/reference/api/materials/uncertainty/)
- [metrology/calibration](https://docs.jmrp.io/phonometry/reference/api/metrology/calibration/)
- [metrology/comparison-calibration](https://docs.jmrp.io/phonometry/reference/api/metrology/comparison-calibration/)
- [metrology/conformance](https://docs.jmrp.io/phonometry/reference/api/metrology/conformance/)
- [metrology/data-qualification](https://docs.jmrp.io/phonometry/reference/api/metrology/data-qualification/)
- [metrology/free-field-corrections](https://docs.jmrp.io/phonometry/reference/api/metrology/free-field-corrections/)
- [metrology/random-incidence](https://docs.jmrp.io/phonometry/reference/api/metrology/random-incidence/)
- [metrology/reciprocity-calibration](https://docs.jmrp.io/phonometry/reference/api/metrology/reciprocity-calibration/)
- [metrology/reciprocity-coupler](https://docs.jmrp.io/phonometry/reference/api/metrology/reciprocity-coupler/)
- [metrology/reciprocity-free-field](https://docs.jmrp.io/phonometry/reference/api/metrology/reciprocity-free-field/)
- [metrology/reference-values](https://docs.jmrp.io/phonometry/reference/api/metrology/reference-values/)
- [metrology/sound-calibrator](https://docs.jmrp.io/phonometry/reference/api/metrology/sound-calibrator/)
- [metrology/sound-level-meter](https://docs.jmrp.io/phonometry/reference/api/metrology/sound-level-meter/)
- [metrology/uncertainty](https://docs.jmrp.io/phonometry/reference/api/metrology/uncertainty/)
- [noise_control/cabin-insulation](https://docs.jmrp.io/phonometry/reference/api/noise_control/cabin-insulation/)
- [noise_control/duct-modes](https://docs.jmrp.io/phonometry/reference/api/noise_control/duct-modes/)
- [noise_control/duct-path](https://docs.jmrp.io/phonometry/reference/api/noise_control/duct-path/)
- [noise_control/duct-walls](https://docs.jmrp.io/phonometry/reference/api/noise_control/duct-walls/)
- [noise_control/enclosure-insulation](https://docs.jmrp.io/phonometry/reference/api/noise_control/enclosure-insulation/)
- [noise_control/enclosures](https://docs.jmrp.io/phonometry/reference/api/noise_control/enclosures/)
- [noise_control/hvac](https://docs.jmrp.io/phonometry/reference/api/noise_control/hvac/)
- [noise_control/room-to-room](https://docs.jmrp.io/phonometry/reference/api/noise_control/room-to-room/)
- [noise_control/screen-in-situ](https://docs.jmrp.io/phonometry/reference/api/noise_control/screen-in-situ/)
- [noise_control/silencer-in-situ](https://docs.jmrp.io/phonometry/reference/api/noise_control/silencer-in-situ/)
- [noise_control/silencer-measurement](https://docs.jmrp.io/phonometry/reference/api/noise_control/silencer-measurement/)
- [noise_control/silencers](https://docs.jmrp.io/phonometry/reference/api/noise_control/silencers/)
- [noise_control/valves](https://docs.jmrp.io/phonometry/reference/api/noise_control/valves/)
- [noise_control/valves-hydrodynamic](https://docs.jmrp.io/phonometry/reference/api/noise_control/valves-hydrodynamic/)
- [power/declaration](https://docs.jmrp.io/phonometry/reference/api/power/declaration/)
- [power/free-field-qualification](https://docs.jmrp.io/phonometry/reference/api/power/free-field-qualification/)
- [power/intensity](https://docs.jmrp.io/phonometry/reference/api/power/intensity/)
- [power/intensity-compliance](https://docs.jmrp.io/phonometry/reference/api/power/intensity-compliance/)
- [power/reference-sound-source](https://docs.jmrp.io/phonometry/reference/api/power/reference-sound-source/)
- [power/sound-power](https://docs.jmrp.io/phonometry/reference/api/power/sound-power/)
- [power/sound-power-anechoic](https://docs.jmrp.io/phonometry/reference/api/power/sound-power-anechoic/)
- [power/sound-power-hard-walled](https://docs.jmrp.io/phonometry/reference/api/power/sound-power-hard-walled/)
- [power/sound-power-high-frequency](https://docs.jmrp.io/phonometry/reference/api/power/sound-power-high-frequency/)
- [power/sound-power-in-duct](https://docs.jmrp.io/phonometry/reference/api/power/sound-power-in-duct/)
- [power/sound-power-in-situ](https://docs.jmrp.io/phonometry/reference/api/power/sound-power-in-situ/)
- [power/sound-power-intensity](https://docs.jmrp.io/phonometry/reference/api/power/sound-power-intensity/)
- [power/sound-power-intensity-points](https://docs.jmrp.io/phonometry/reference/api/power/sound-power-intensity-points/)
- [power/sound-power-plant](https://docs.jmrp.io/phonometry/reference/api/power/sound-power-plant/)
- [power/sound-power-reverberation](https://docs.jmrp.io/phonometry/reference/api/power/sound-power-reverberation/)
- [power/sound-power-special-room](https://docs.jmrp.io/phonometry/reference/api/power/sound-power-special-room/)
- [power/turbine-noise](https://docs.jmrp.io/phonometry/reference/api/power/turbine-noise/)
- [power/vibration-sound-power](https://docs.jmrp.io/phonometry/reference/api/power/vibration-sound-power/)
- [power/workstation](https://docs.jmrp.io/phonometry/reference/api/power/workstation/)
- [psychoacoustics/annoyance](https://docs.jmrp.io/phonometry/reference/api/psychoacoustics/annoyance/)
- [psychoacoustics/contours](https://docs.jmrp.io/phonometry/reference/api/psychoacoustics/contours/)
- [psychoacoustics/ecma](https://docs.jmrp.io/phonometry/reference/api/psychoacoustics/ecma/)
- [psychoacoustics/erb-scale](https://docs.jmrp.io/phonometry/reference/api/psychoacoustics/erb-scale/)
- [psychoacoustics/fluctuation-strength](https://docs.jmrp.io/phonometry/reference/api/psychoacoustics/fluctuation-strength/)
- [psychoacoustics/fluctuation-strength-ecma](https://docs.jmrp.io/phonometry/reference/api/psychoacoustics/fluctuation-strength-ecma/)
- [psychoacoustics/moore-glasberg](https://docs.jmrp.io/phonometry/reference/api/psychoacoustics/moore-glasberg/)
- [psychoacoustics/moore-glasberg-time](https://docs.jmrp.io/phonometry/reference/api/psychoacoustics/moore-glasberg-time/)
- [psychoacoustics/roughness-ecma](https://docs.jmrp.io/phonometry/reference/api/psychoacoustics/roughness-ecma/)
- [psychoacoustics/sharpness](https://docs.jmrp.io/phonometry/reference/api/psychoacoustics/sharpness/)
- [psychoacoustics/tonality](https://docs.jmrp.io/phonometry/reference/api/psychoacoustics/tonality/)
- [psychoacoustics/tonality-ecma](https://docs.jmrp.io/phonometry/reference/api/psychoacoustics/tonality-ecma/)
- [psychoacoustics/tone-audibility](https://docs.jmrp.io/phonometry/reference/api/psychoacoustics/tone-audibility/)
- [psychoacoustics/zwicker](https://docs.jmrp.io/phonometry/reference/api/psychoacoustics/zwicker/)
- [rooms/acoustics](https://docs.jmrp.io/phonometry/reference/api/rooms/acoustics/)
- [rooms/auditorium](https://docs.jmrp.io/phonometry/reference/api/rooms/auditorium/)
- [rooms/crowd-noise](https://docs.jmrp.io/phonometry/reference/api/rooms/crowd-noise/)
- [rooms/enclosed-space-absorption](https://docs.jmrp.io/phonometry/reference/api/rooms/enclosed-space-absorption/)
- [rooms/image-source](https://docs.jmrp.io/phonometry/reference/api/rooms/image-source/)
- [rooms/impulse-response](https://docs.jmrp.io/phonometry/reference/api/rooms/impulse-response/)
- [rooms/modes](https://docs.jmrp.io/phonometry/reference/api/rooms/modes/)
- [rooms/noise-criteria](https://docs.jmrp.io/phonometry/reference/api/rooms/noise-criteria/)
- [rooms/open-plan](https://docs.jmrp.io/phonometry/reference/api/rooms/open-plan/)
- [rooms/reverberation-prediction](https://docs.jmrp.io/phonometry/reference/api/rooms/reverberation-prediction/)
- [rooms/spatial-decay](https://docs.jmrp.io/phonometry/reference/api/rooms/spatial-decay/)
- [rooms/steady-field](https://docs.jmrp.io/phonometry/reference/api/rooms/steady-field/)
- [rooms/workroom-prediction](https://docs.jmrp.io/phonometry/reference/api/rooms/workroom-prediction/)
- [signals/cepstrum](https://docs.jmrp.io/phonometry/reference/api/signals/cepstrum/)
- [signals/correlation](https://docs.jmrp.io/phonometry/reference/api/signals/correlation/)
- [signals/envelope](https://docs.jmrp.io/phonometry/reference/api/signals/envelope/)
- [signals/inversion](https://docs.jmrp.io/phonometry/reference/api/signals/inversion/)
- [signals/levels](https://docs.jmrp.io/phonometry/reference/api/signals/levels/)
- [signals/miso](https://docs.jmrp.io/phonometry/reference/api/signals/miso/)
- [signals/multitaper](https://docs.jmrp.io/phonometry/reference/api/signals/multitaper/)
- [signals/phase](https://docs.jmrp.io/phonometry/reference/api/signals/phase/)
- [signals/spectra](https://docs.jmrp.io/phonometry/reference/api/signals/spectra/)
- [signals/synchronous-average](https://docs.jmrp.io/phonometry/reference/api/signals/synchronous-average/)
- [signals/test-signals](https://docs.jmrp.io/phonometry/reference/api/signals/test-signals/)
- [signals/time-frequency](https://docs.jmrp.io/phonometry/reference/api/signals/time-frequency/)
- [signals/windows](https://docs.jmrp.io/phonometry/reference/api/signals/windows/)
- [simulation/elastic-fdtd](https://docs.jmrp.io/phonometry/reference/api/simulation/elastic-fdtd/)
- [simulation/fdtd](https://docs.jmrp.io/phonometry/reference/api/simulation/fdtd/)
- [simulation/ntff](https://docs.jmrp.io/phonometry/reference/api/simulation/ntff/)
- [solids/catalogue](https://docs.jmrp.io/phonometry/reference/api/solids/catalogue/)
- [solids/damping](https://docs.jmrp.io/phonometry/reference/api/solids/damping/)
- [solids/damping-treatments](https://docs.jmrp.io/phonometry/reference/api/solids/damping-treatments/)
- [solids/elastic](https://docs.jmrp.io/phonometry/reference/api/solids/elastic/)
- [solids/nonlinearity](https://docs.jmrp.io/phonometry/reference/api/solids/nonlinearity/)
- [solids/orthotropic-wood](https://docs.jmrp.io/phonometry/reference/api/solids/orthotropic-wood/)
- [solids/plateau](https://docs.jmrp.io/phonometry/reference/api/solids/plateau/)
- [speech/objective-intelligibility](https://docs.jmrp.io/phonometry/reference/api/speech/objective-intelligibility/)
- [speech/sii](https://docs.jmrp.io/phonometry/reference/api/speech/sii/)
- [speech/sti](https://docs.jmrp.io/phonometry/reference/api/speech/sti/)
- [underwater/acoustics](https://docs.jmrp.io/phonometry/reference/api/underwater/acoustics/)
- [underwater/ambient-noise](https://docs.jmrp.io/phonometry/reference/api/underwater/ambient-noise/)
- [underwater/audiograms](https://docs.jmrp.io/phonometry/reference/api/underwater/audiograms/)
- [underwater/closed-form](https://docs.jmrp.io/phonometry/reference/api/underwater/closed-form/)
- [underwater/numerical](https://docs.jmrp.io/phonometry/reference/api/underwater/numerical/)
- [underwater/pile-driving-noise](https://docs.jmrp.io/phonometry/reference/api/underwater/pile-driving-noise/)
- [underwater/seabed-reflection](https://docs.jmrp.io/phonometry/reference/api/underwater/seabed-reflection/)
- [underwater/ship-radiated-noise](https://docs.jmrp.io/phonometry/reference/api/underwater/ship-radiated-noise/)
- [underwater/ship-traffic-noise](https://docs.jmrp.io/phonometry/reference/api/underwater/ship-traffic-noise/)
- [underwater/sonar-equation](https://docs.jmrp.io/phonometry/reference/api/underwater/sonar-equation/)
- [underwater/sound-speed](https://docs.jmrp.io/phonometry/reference/api/underwater/sound-speed/)
- [underwater/weighting](https://docs.jmrp.io/phonometry/reference/api/underwater/weighting/)
- [underwater/weston-regimes](https://docs.jmrp.io/phonometry/reference/api/underwater/weston-regimes/)
- [vibration/building-damage](https://docs.jmrp.io/phonometry/reference/api/vibration/building-damage/)
- [vibration/building-response](https://docs.jmrp.io/phonometry/reference/api/vibration/building-response/)
- [vibration/coupling](https://docs.jmrp.io/phonometry/reference/api/vibration/coupling/)
- [vibration/diagnostics](https://docs.jmrp.io/phonometry/reference/api/vibration/diagnostics/)
- [vibration/evaluation](https://docs.jmrp.io/phonometry/reference/api/vibration/evaluation/)
- [vibration/experimental-sea](https://docs.jmrp.io/phonometry/reference/api/vibration/experimental-sea/)
- [vibration/exposure](https://docs.jmrp.io/phonometry/reference/api/vibration/exposure/)
- [vibration/ground](https://docs.jmrp.io/phonometry/reference/api/vibration/ground/)
- [vibration/impact-mobility](https://docs.jmrp.io/phonometry/reference/api/vibration/impact-mobility/)
- [vibration/instrumentation](https://docs.jmrp.io/phonometry/reference/api/vibration/instrumentation/)
- [vibration/junction-transmission](https://docs.jmrp.io/phonometry/reference/api/vibration/junction-transmission/)
- [vibration/mechanical-mobility](https://docs.jmrp.io/phonometry/reference/api/vibration/mechanical-mobility/)
- [vibration/multiple-shock](https://docs.jmrp.io/phonometry/reference/api/vibration/multiple-shock/)
- [vibration/people](https://docs.jmrp.io/phonometry/reference/api/vibration/people/)
- [vibration/point-mobility](https://docs.jmrp.io/phonometry/reference/api/vibration/point-mobility/)
- [vibration/prediction](https://docs.jmrp.io/phonometry/reference/api/vibration/prediction/)
- [vibration/radiation-efficiency](https://docs.jmrp.io/phonometry/reference/api/vibration/radiation-efficiency/)
- [vibration/railway](https://docs.jmrp.io/phonometry/reference/api/vibration/railway/)
- [vibration/railway-prediction](https://docs.jmrp.io/phonometry/reference/api/vibration/railway-prediction/)
- [vibration/seat-vibration](https://docs.jmrp.io/phonometry/reference/api/vibration/seat-vibration/)
- [vibration/signal-burst](https://docs.jmrp.io/phonometry/reference/api/vibration/signal-burst/)
- [vibration/train-categories](https://docs.jmrp.io/phonometry/reference/api/vibration/train-categories/)
- [vibration/transfer-stiffness](https://docs.jmrp.io/phonometry/reference/api/vibration/transfer-stiffness/)
- [vibration/vibration-meter](https://docs.jmrp.io/phonometry/reference/api/vibration/vibration-meter/)