摘要
介绍一项由微电脑为核心的钢琴音准监测仪的软、硬件设计。采用 Z80 CPU,电容话筒作不接触声波接收,带通滤波器作特征频率提取,能准确分辨1音分的频率变化。
The hardware and software designs of a piano tone monitor with a microprocessor are introduced.By means of a Z-80 CPU,a capacitance micro- phone for.sound wave receiving,and a band pass filter group for characte- ristic frequency selection,one cent of frequency difference can be distinguished.
关键词
钢琴
弦振动
测量
带通滤波器
Piano
String Vibration Measurement
Band Pass Filters
Linear Regression
