随着数字信号处理技术的发展，使用数字音频技术的电子产品越来越多。数字音频接口成为发展的潮流，采用脉冲密度调制（PDM）接口的ECM和MEMS数字麦克风也孕育而生。
目前，ECM和MEMS数字麦克风已经成为便携式笔记本电脑拾音设备的主流。 数字ECM或MEMS麦克风和传统的ECM麦克风相比，有着不可取代的优势。首先，移动设备向小型化数字化发展，急需数字拾音器件和技术；第二，设备包含的功能单元越来越多，如笔记本电脑，集成了蓝牙和WiFi无线功能，麦克风距离这些干扰源很近，设备对抗扰要求越来越高；第三，三网合一的发展，需要上网，视频和语音通信可以同时进行，这在移动设备中通常会遇到环境噪声和回声的影响；第四，从提高生产效率角度，希望对麦克风采用SMT焊接。数字麦克风适合SMT焊接，可以解决系统各种射频干扰对语音通信产生的噪声，富迪科技的数字阵列麦克风拾音技术可以抑制和消除通话时的回声和环境噪声，数字接口方便同数字系统的连接。
With the development of digital signal processing technology, more and more electronic products use digital audio technology. Digital audio interfaces have become the trend of development, and ECM and MEMS digital microphones using the Pulse Density Modulation (PDM) interface have also been born.
At present, ECM and MEMS digital microphones have become the mainstream of portable notebook computer pickup devices. Digital ECM or MEMS microphones have an irreplaceable advantage over traditional ECM microphones. First of all, the development of mobile devices to miniaturization is in urgent need of digital pickup devices and technologies. Second, devices contain more and more functional units, such as laptops, which integrate Bluetooth and WiFi wireless capabilities. The microphones are close to these interference sources. The requirements for equipment anti-disturbance are getting higher and higher. Third, the development of triple play requires Internet access. Video and voice communications can be carried out at the same time. This usually affects the impact of environmental noise and echo in mobile devices. Fourth, from To improve production efficiency, it is desirable to use SMT welding on microphones. The digital microphone is suitable for SMT welding and can solve the system's various radio frequency interference to the noise generated by voice communication. Fortex's digital array microphone pickup technology can suppress and eliminate the echo and environmental noise during the call. The digital interface facilitates the connection with the digital system. .
