摘要
利用声波多普勒效应导致声强变化的特性,设计了声波多普勒效应实验装置,该装置将声音信号转变成电信号,并用信号大器进行放大,驱动发光二极管发光演示了声波的多普勒效应.
Using the characteristic of intensity of sound changed by sound wave Doppler effect,the sound wave Doppler effect experiment apparatus is designed, By which sound signal could be transformed to electric signal, then the signal is expanded by signal amplifier and drives the light emitting diode luminescence, so the sound wave Doppler effect is demonstrated.
出处
《物理实验》
2006年第9期36-37,共2页
Physics Experimentation
关键词
多普勒效应
频率
声强
发光二极管
Doppler effect, frequency
sound intensity, light emitting diode
