Loudness

MATLAB code to evaluate audio loundness over time

MATLAB code to evaluate audio loundness over time
  1. How to calculate loudness in Matlab?
  2. How to scale audio signal in Matlab?

How to calculate loudness in Matlab?

Measure Loudness and Sharpness of Stationary Signals

fs = 48e3; dur = 5; pnoise = 2*pinknoise(dur*fs); wnoise = rand(dur*fs,1) - 0.5; wnoise = wnoise*sqrt(var(pnoise)/var(wnoise)); Call acousticLoudness using the default ISO 532-1 (Zwicker) method and no output arguments to plot the loudness of the pink noise.

How to scale audio signal in Matlab?

Create an audioTimeScaler with a speedup factor of 0.8 . Set InputDomain to "Frequency" and specify the window and overlap length used to transform time-domain audio to the frequency domain. Set LockPhase to true to increase the fidelity in the time-scaled output.

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