基于FSK声波通信的耳机检测系统

Headphone detection system based on FSK sound wave communication

由计算机系统和耳机的功放组成发射设备,计算机系统和麦克风组成接收设备,通过将信源数据进行FSK调制后播放,同时麦克风采样功放声音,将采集的信号进行FSK解调后得到信宿数据,通过对比信源和信宿的对比,即可检测出耳机的状态。本文详细介绍了整个声波检测系统的原理和软件的设计,且给出了在不同的载波频率和噪音环境下,耳机检测系统的准确性。

A computer system and a headphone’s amplifier constitute a transmitting device,the computer system and the headphone’s microphone constitute a receiving device.the source data is played after FSK modulation,and the microphone samples the sound of the amplifier at the same time,Sink data is obtained after demodulating the collected signal by FSK,comparing the source and the sink,then find out if the headset is normal or bad.This article introduces in detail the principle of sound wave detection system and software design,and gives the accuracy of the earphone detection system under different carrier frequencies and noise environments.