How do I filter an audio signal that has 4 noise spikes in its Fourier transform in Matlab? -


i'm beginner in using matlab, , version r2012b. provided, assignment, audio signal sampling frequency in .mat file can play see signal (handel's hallelujah constant noise). can use wavwrite function hear outside of matlab. now, when fft, can see plotted sound - with, however, 4 high spikes in frequency spectral analysis.

i asked design filter remove noise, , instruction should remove these spikes. how should proceed this? first i've tried set 0 parts of fourier transform spiked, distorted signal. i've tried using filter design toolbox design bandstop filter, didn't know how since weren't yet introduced it. filter should use , how?

matlab have signal toolbox come gui build low-pass, bandstop , high-pass filter. command fdatool. pole/zero plot, try figure out best parameter use bandstop. sure pole filter else you'll add noise back.


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