I am trying to analyze the spectrum of an audio .wav file which was recorded by someone else.
The .wav file has two tracks in it, so I just used one of them. The sampling rate is indicated in the file properties as 44 kHz.
I wrote the Matlab code as below:
I agree with Audioguru. Seems to be wind hitting a microphone. The final part of the record is definitely clipped and also shows a poor low frequency response of the pre-amp.