Frequency

Attenuate frequency bin in FFT array resulting in artifacts [duplicate]

Attenuate frequency bin in FFT array resulting in artifacts [duplicate]
  1. Why is it a bad idea to filter by zeroing out FFT bins?
  2. How many frequency bins are generated by the FFT?

Why is it a bad idea to filter by zeroing out FFT bins?

FFT gives poor time resolution i.e it doesn't give information at what time that particular frequency exist. It gives information on existing frequency components for given signal duration. By zeroing bins in FFT gives poor resolution after IFFT in time domain.

How many frequency bins are generated by the FFT?

FR = Fmax/N(Bins)

With a 1024 FFT size, we divide this band into 512 bins.

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