Noise removal from audio using FFT/Spectral editing

1. Does Fourier transform reduce noise?
2. How do you reduce noise in a Spectra?
3. Which technique is used to remove noise from data?

Does Fourier transform reduce noise?

In the above, Fourier transform has proven to be functional and efficient tool for noise reduction.

How do you reduce noise in a Spectra?

The spectrum subtraction method is one of the most common methods by which to remove noise from a spectrum. Like many noise reduction methods, the spectrum subtraction method uses discrete Fourier transform (DFT) for frequency analysis. There is generally a trade-off between frequency and time resolution in DFT.

Which technique is used to remove noise from data?

Under-sampling: Unlike oversampling, this technique balances the imbalance dataset by reducing the size of the class which is dominant among the two classes.