Zhijian He

Digital contact type vibration acoustic pickup

Raised type printed circuit board

Silicon microphone packaged by flexible circuit board

PCB flexible plate integrated encapsulation silicon microphone

Electret capacitor microphone and preparation method thereof

Silicon microphone capable of being welding on two sides

Vibrating sound pick-up parameter analyzing and testing device

A silicon speaker

Micro electret capacitance microphone

Double sides welding silicon microphone