Question

What filter types are used to clarify sound signals besides a band-pass filter? and how ?

Answer 1

An audio pass filter attenuates an entire range of frequencies. There are two types of pass filters . A high-pass filter (HPF) attenuates content below a cutoff frequency, allowing higher frequencies to pass through the filter. A low-pass filter (LPF) attenuates content above a cutoff frequency, allowing lower frequencies to pass through the filter.

In physical terms, signal and noise are not separate components of an audio signal. We can use filters to remove some of unwanted noises from sound signals.we can use low pass filters ,where we need to have certain range of signals like upto 4 khz like that.in this case we can use low pass filter with cutoff frequency near 4 khz to remove all higher frequencies greater than 4 khz.similarly in the case of high pass filter, to remove frequencies below certain range.

We can use band stop filters also to reject certain of frequencies.