Processing of Speech Signals Based on MATLAB & FDAtool

In order to solve the problem that the speech signal with noise in the communication, the paper proposes a method to reduce the noise of speech signal based on MATLAB & FDAtool. FDAtool is a GUI interface, which has the characteristics of graphic visualization, intuitive and effective to analysis of the system frequency spectrum. By analysis the time and frequency domain characteristics of speech and the noise signal, it makes use of the FDAtool and window functions to design the FIR filter to process the speech signal. The design results show that the combination of window function and FDAtool can effective perform signal processing and reduce the noise.