Digital ECM or MEMS microphones have an irreplaceable advantage over traditional ECM microphones. First of all, mobile devices are becoming more and more digital, and digital pickup devices and technologies are urgently needed. Second, devices include more and more functional units, such as notebook computers, which integrate Bluetooth and WiFi wireless functions. The microphones are close to these interference sources. Equipment anti-interference requirements are getting higher and higher; third, the development of triple play requires Internet access, video and voice communication can be carried out simultaneously, which usually encounters environmental noise and echo in mobile devices; fourth, from To improve production efficiency, I hope to use SMT soldering for the microphone. The digital microphone is suitable for SMT welding, which can solve the noise generated by various radio frequency interferences in the system. The digital array microphone pickup technology of Huasheng Technology can suppress and eliminate the echo and environmental noise during the call, and the digital interface facilitates the connection with the digital system. .