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, automotive electronic equipment, telephone, timer and other electronic products