how to calculate sound level (spL) audio file (*.wav) ?

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calculate sound level

Answers (1)

jibrahim
jibrahim on 4 Mar 2021
Hi ngoc,
You can use splMeter from Audio Toolbox.
% EXAMPLE: Calculate sound pressure level of signal
audFileName = 'FunkyDrums-44p1-stereo-25secs.mp3';
scope = timescope('SampleRate',Fs,...
'TimeSpanSource','property',...
'YLimits',[20 110], 'AxesScaling','auto',...
'ChannelNames',...
{'LAF', 'LAeq', 'LApeak', 'LAmax'});
sm = splMeter('TimeWeighting', 'Fast',...
'FrequencyWeighting', 'A-weighting',...
'SampleRate', Fs, ...
'TimeInterval',2,...
'CalibrationFactor',1);
x = audioread(audFileName);
[LAF,LAeq,LApeak,LAmax] = sm(x(:,1));
scope([LAF,LAeq,LApeak,LAmax])
  12 Comments
Justin
Justin on 29 Oct 2022
Hi, any idea how to obtain the L10, L50 and L90 sound level from an audioread() file?
ranavind
ranavind on 31 Jan 2023
Any Idea, How to use this code in another application like .Net or Python

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