Design a digital filter to suppress the noise embedded in speech signals. It is
assumed that the bandwidth of speech signals is 4KHz, and the noise is white so that
it covers all frequency bands.
Determine the filter type, and justify your choice.
Choose the filter parameters including cut-off frequency, filter order and etc.
Obtain the filter coefficients, and show the frequency response of your designed
filter (with the help of Matlab).
Explain whether your designed filter can completely remove the noise or not.
Need it in 6 hours.
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