The acoustic detector in the armband contains five piezoelectric cantilevers, each weighted to respond to certain bands of sound frequencies.
臂带上的声波检测器带有五个压电悬臂，每一个可以检测某个特定频段的声音。
2
Weft detector: Piezoelectric ceramic.
⑩纬纱检测器：压电陶瓷式。
3
Piezoelectric chemical sensor is an important mass-sensitive detector. It has a wide application for its superiority such as small size, fast response and high sensitivity, etc.