How to remove multiple evenly spaced frequency components from digital signal
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the FFT of my acustic signal returned some evenly spaced back group noisey frequencies 3,6,9,12,15hz. To remove them at once, I beliebe I can use a irrnotch or irrcomb. But the example of both functions only demonstrated how to remove a signal frequency component, which is a 60hz notch. I am wondering how can I remove multiple evenly spaced frequency components at once.