蜂鸣器是一种一体化结构的电子讯响器，采用直流电压供电，广泛应用于计算机、打印机、复印机、报警器、电子玩具、汽车电子设备、电话机、定时器等电子产品中-Buzzer is an integration of electron acoustic structure, USES the dc voltage power supply, is widely used in computers, printers, photocopiers, alarm, electronic toys, automoti