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Measurements and Spatial Audio

Acoustics, psychoacoustics, room impulse response, HRTF, SPL metering

Audio Toolbox™ enables you to measure acoustics, encode and decode ambisonics, interpolate head-related transfer functions (HRTF) and return industry-standard audio measurements.

Apps

Impulse Response MeasurerMeasure impulse response of audio system

Functions

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octaveFilterOctave-band and fractional octave-band filter
octaveFilterBankOctave and fractional-octave filter bank (Since R2019a)
weightingFilterFrequency-weighted filter
interpolateHRTF3-D head-related transfer function (HRTF) interpolation
sofareadRead SOFA files (Since R2023b)
sofawriteWrite SOFA files (Since R2023b)
sofaconventionCreate SOFA convention (Since R2023b)
sofareadRead SOFA files (Since R2023b)
sofawriteWrite SOFA files (Since R2023b)
sofaconventionCreate SOFA convention (Since R2023b)
impzestEstimate impulse response of audio system
mlsMaximum length sequence
sweeptoneExponential swept sine
acousticToneToNoiseRatioIdentify and quantify tones in acoustic signals (Since R2023b)
acousticProminenceRatioQuantify tonality by comparing critical bands (Since R2023b)
acousticLoudnessPerceived loudness of acoustic signal (Since R2020a)
acousticSharpnessPerceived sharpness of acoustic signal (Since R2020a)
acousticFluctuationPerceived fluctuation strength of acoustic signal (Since R2020b)
acousticRoughnessPerceived roughness of acoustic signal (Since R2021a)
calibrateMicrophoneCalibration factor for microphone (Since R2020a)
loudnessMeterStandard-compliant loudness measurements
integratedLoudnessMeasure integrated loudness and loudness range
audioLevelMeterMeasure digital audio peak level (Since R2023a)
splMeterMeasure sound pressure level of audio signal
calibrateMicrophoneCalibration factor for microphone (Since R2020a)
erb2hzConvert from equivalent rectangular bandwidth (ERB) scale to hertz (Since R2019a)
bark2hzConvert from Bark scale to hertz (Since R2019a)
mel2hzConvert from mel scale to hertz (Since R2019a)
hz2erbConvert from hertz to equivalent rectangular bandwidth (ERB) scale (Since R2019a)
hz2barkConvert from hertz to Bark scale (Since R2019a)
hz2melConvert from hertz to mel scale (Since R2019a)
phon2soneConvert from phon to sone (Since R2020a)
sone2phonConvert from sone to phon (Since R2020a)
uiaudiometerCreate an audio meter component (Since R2023b)

Properties

Meter PropertiesAudio Meter UI component (Since R2023b)

Blocks

Loudness MeterStandard-compliant loudness measurements
Weighting Filter Weighted frequency response filter
Octave FilterOctave-band and fractional octave-band filter
Octave Filter BankOctave-band and fractional octave-band filter bank (Since R2021a)

Topics