Time changes of sound power spectrum
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Hello,
I would like to evaluate power spectrum (amplitude) changes in several tens of seconds length sound record, only on some chosen frequencies. E.g. on 1,5kHz and 2kHz. I need to plot the changes as a time curves. No spectragraph.
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Image Analyst
on 21 Dec 2014
Look up help on pwelch() and plot(). Get the spectrum, extract the value at the element corresponding to 1.5 and 2 kHz. Repeat for every spectrum and build up an array, then plot it.
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