MATLAB Answers

Power spectrum of audio signal

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Quant.Phys42
Quant.Phys42 on 7 Dec 2019
Answered: Roshni Garnayak on 11 Dec 2019
If i have an audio file, an .m4a file for example, how do i plot the power spectrum of such a signal (without redundant data) with the frequency axis in Hz given that the audio signal is sampled at 40000 Hz?

Answers (1)

Roshni Garnayak
Roshni Garnayak on 11 Dec 2019
To import the audio file into MATLAB workspace, use the ‘audioread’ function. Refer to the link below to get the details of ‘audioread’ function:
To obtain the power spectrum of the audio signal, refer to the following links:
The first link gives examples of power spectrum computation for audio signals. The second link is about the ‘dspdata.psd’ function which computes the power spectral density.

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