MOTOROLA压电喇叭

品牌：MOTOROLA

类型：压电喇叭

产地：美国 

年份：21世纪初

器材简介：

    压电式扬声器是根据石英晶体、钦酸钡等陶瓷压电效应制成的。这类材料对其施加压力会产生电压，相反给它输入交变电压时材料又会发声弯曲、收缩等形变振动而驱动纸盆发音。因有发电、发声的可逆性，最初被用作话筒机电元件，后来又用其馈电发声制成扬声器。

    受材料形变幅度所限，压电扬声器的功率还做不大。压电扬声器频响比较差，有效频响仅为400Hz-4KHz，也要通过电容耦合才能作为功放负载。

MOTOROLA(英文版）

Brand: MOTOROLA

Type: Piezoelectric Horn

Origin: United States

Year: early twenty-first Century

Equipment introduction:

    Piezoelectric loudspeaker is made of quartz crystal, barium titanate ceramic pressure. This kind of material will produce a voltage if give it pressure, in contrast, if input alternating voltage, the material will occur deformation vibration like bend or shrink and drive cone to make sound. Because of the reversibility of electric and sound generation, it was originally used as a microphone electromechanical components, and then it was made as speaker due to the feed voice.

   The pressure electric loudspeaker’s power is not so big because of the material deformation amplitude limitation. Piezoelectric loudspeaker frequency response is poor, effective frequency response is only 400Hz-4KHz and its amplifier load also need to through capacitive coupling.