摘要
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。
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 introduced.It is the prin-ciple and main technical specification of sound accurate indicating instrument which is based on microprocessor.
出处
《电声技术》
2010年第12期54-56,64,共4页
Audio Engineering
关键词
基音检测
微处理器
音准仪
fundamental frequency examination
microprocessor
sound accurate meter
