MEMS Microphone Are Resistant To External Mechanical Vibration Makes Them The Perfect Choice For Video And Audio Production

 

MEMS Microphone

MEMS microphones are an alternative to conventional ECM microphones but have certain disadvantages. Unlike ECM microphones, MEMS mics are much smaller and have higher electrical noise immunity. A MEMS is an electro-acoustic transducer that houses a sensor and application-specific integrated circuit. The sensor converts the variable sound pressure into capacitance variations, which are then converted to a digital or analog output. It is a highly sensitive, reliable, and low-cost microphone. Currently, the microphone is popular in many industries. A few of the most popular MEMS applications are in video and audio production.

MEMS are typically characterized by a high Signal-to-Noise Ratio (SNR), which is an indicator of how well the mic performs in acoustic environments. The best SNR of a MEMS can be up to 80 dBA. Moreover, a higher SNR means lower background noise. This characteristic is especially important in recording environments where the mic is placed close to the sound source. A MEMS Microphone contains a diaphragm made of silicon. The diaphragm is shaped like a capacitor and moves when sound pressure waves are applied to it. A second semiconductor die, called an audio preamplifier, converts the changing capacitance of the MEMS into an electrical signal. This signal is then output to a microprocessor or DSP. The microcontroller then communicates with the analog to digital converter using pulse density modulation (PDM).

A MEMS can record high-quality sound in a variety of applications. TDK MEMS Microphone T4081 has a low input-overload (IOP) point, which means that it won't clip even at very high levels. A high-quality MEMS will also have a large dynamic range, which is also known as the dynamic range. The two characteristics must be compatible in order to be a good choice for recording.

 

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