Description: The main purpose of this course is designed in the MATLAB environment, the use of window design method to design a filter, and the voice signal filtering noise. Development platform for MATLAB7.0, design methods for the window design method. Collecting a voice signal with a microphone, and observe its spectrum waveform drawing, given the corresponding technical indicators, using a Kaiser window design FIR filter meet the target, the filter denoising speech signal processing, a waveform and spectrum before and after filtering and analyzed. Before and after the filter in the speech signal waveform changes, because we recorded voice signal to noise is low, they observed not obvious, but the waveform in the frequency domain, we can clearly see the design of a filter for the filtering of the speech signal processing , the noise were filtered out. The filtering basically reached the requirements to complete the design specifications.
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