How do i analyzing frequency using matlab

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nnm

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i want to analyze frequency which is recorded in matlab using wavrecord command ,

what is the highest frequency (for select best sampling rate next time recording)

Reduced noise
Understand behavior of frequency

plz anybody knows those thing post it for everybody's knowledge
 

use fft function you can get the spectrum of the signal.

Ryan
 

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    nnm

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If you need time domain -- use a BPF or you use the PSD function for FD interpretation.
 

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