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February 2017
DocID025704 Rev 2
1/20
www.st.com
AN4426
Application note
Tutorial for MEMS microphones
Introduction
This application note serves as a tutorial for MEMS microphones, providing general characteristics of
these devices, both acoustic and mechanical, as well as summarizing the portfolio available from ST.
MEMS microphones target all audio applications where small size, high sound quality, reliability and
affordability are key requirements.
ST's MEMS microphones are designed, developed and manufactured within ST, creating an industry-
unique, vertically integrated supply chain. Both analog and digital-input, top and bottom-port solutions
are available.
Our best-in-class AOP and SNR make ST’s MEMS microphones suitable for applications that require a
very high dynamic range, improving the audio experience in any environment. Matching very tight
sensitivity allows optimizing beamforming and noise cancelling algorithms for multi-microphone arrays.
Low power consumption allows extending battery life.
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