Comb filter to remove noise?
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I'm supposed to make a comb filter to remove the noise at 120Hz and 240Hz, with the sampling frequency at 960Hz but I'm not sure where to start.
Here is the signal
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/145522/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/145523/image.png)
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