MATLAB: Create Low Pass filter Code

signal

Hello everyone I have an audio file of the sound it has a woman's voice speaks but to hear it i need to filter the sound by filter, cut the high frequencies and higher 5KHz I do it all in the Matlab code and not through the GUI Please help me Tnx…

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Designing Low Pass FIR Filters

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MATLAB: Low-pass filter

hsize=??          % define
h=fspecial('average',hsize);
filter_wmarked=imfilter(wmarked,h);

MATLAB: Low pass filter design

My preference would be an elliptic IIR filter for efficiency. See the documentation for ellip for details. For best results, begin with ellipord, and get the [z,p,k] output from ellip, then use second-order-section representation for stability with zp2sos. Use that result with filtfilt to do the actual filtering.

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MATLAB: Low-pass filter

MATLAB: Low pass filter design

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