With the development of digital signal processing technology, more and more electronic products use digital audio technology. Digital audio interface has become the trend of development, and ECM and MEMS digital microphones using pulse density modulation (PDM) interfaces have also been born.
Currently, ECM and MEMS digital microphones have become the mainstream of portable notebook computer sound pickup equipment.
Compared with traditional ECM microphones, digital ECM or MEMS microphones have irreplaceable advantages. First of all, mobile devices are developing towards miniaturization and digitalization, 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, and microphones are very close to these interference sources. Equipment anti-jamming requirements are getting higher and higher; third, the development of triple play requires Internet access, and video and voice communications can be carried out at the same time. This is usually affected by environmental noise and echo in mobile devices; fourth, from To improve production efficiency, I hope to use SMT soldering for the microphone. Digital microphones are suitable for SMT welding and can solve the noise caused by various radio frequency interference of the system. Fortetech's digital array microphone pickup technology can suppress and eliminate echo and environmental noise during calls. The digital interface facilitates the connection with the digital system. .