声音基频检测技术的研究与应用

常用的声音信号基音检测技术包括软件和硬件两部分内容,通过对信号采取稳幅、多重滤波、去除异常值等操作,使自相关函数基音检测法得到了改进;设计了一种有效零点检测法,使基于波形峰值检测的硬件基音检测法得以改进;介绍了基音检测技术的实际应用,为一种以微处理器为核心的音准指示仪的组成原理及主要技术指标。

Research and Application of Sound Fundamental Frequency Examination Technology

The base frequency examination technology of common sound signal includes the software and the hard-ware contents.Through amplitude stabilize,multiple filter,elimination unusual value to the signal,the autoco-rrelation function on base frequency examination is improved.A kind of effective zero-point examination law is designed,and hardware fundamental frequency examination law based on the peak value examination of wave form is improved.The practical application of base frequency examination technology is i...