Is MEMS microphone noise Cancelling?

[MSam.11]

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[S.Ma]

Mems microphone are just small size microphones. Cancelling a noise means to have another source (or a delayed version) to digitally mix and go to a sperakerphone.

[S.Ma]

ChatGPT didn't miss thr sniper microphone...

A microphone is a device that converts sound waves into an electrical current. A Microelectromechanical Systems (MEMS) microphone is a type of microphone that uses a small mechanical structure to convert sound waves into an electrical signal. Some MEMS microphones have noise canceling capabilities, which means that they can reduce or eliminate unwanted background noise from the audio signal they capture.

Noise canceling in microphones is achieved through the use of directional sensing, which is the ability to focus on sounds coming from a specific direction while rejecting sounds coming from other directions. This is done by using a directional microphone element, which is typically a cardioid or super-cardioid polar pattern. These patterns are directional, meaning they capture sound best from a certain direction and reject sound from other directions.

In addition to directional sensing, noise canceling in microphones can also be achieved through the use of active noise cancellation (ANC) techniques. These techniques use an additional microphone to capture ambient noise and then use digital signal processing (DSP) to create an "anti-noise" signal that is the exact opposite of the ambient noise. This anti-noise signal is then subtracted from the audio signal captured by the microphone, effectively canceling out the ambient noise.

It's worth noting that not all MEMS microphones have noise canceling capabilities.