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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