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本文简要介绍了语音信号采集与分析以及语音信号的特征、采集与分析方法,并在采集语音信号后,在Matlab软件平台上进行频谱分析,然后对所采集的语音信号加入干扰噪声,对加入噪声的信号进行频谱分析,设计合适的滤波器滤除噪声,恢复原信号。利用Matlab来读入(采集)语音信号,将它赋值给某一向量,再将该向量看作一个普通的信号,对其进行FFT(Fast Fourier transform)变换实现频谱分析,再依据实际情况对它进行滤波,然后我们还可以通过sound命令来对语音信号进行回放,以便在听觉上来感受声音的变化。
This article briefly introduces the voice signal acquisition and analysis and voice signal characteristics, acquisition and analysis methods, and after the acquisition of voice signal, in the Matlab software platform for spectrum analysis, and then added to the collected voice signal interference noise, adding noise Of the signal spectrum analysis, design a suitable filter to filter out noise, restore the original signal. Use Matlab to read in (collect) the voice signal, assign it to a vector, then regard the vector as a normal signal, carry on spectrum analysis to its Fast Fourier Transform (FFT) and then analyze it according to the actual situation After filtering, then we can also use the sound command to play back the voice signal, in order to hear the sound changes.