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Instead of Pi it could have been a dozen different IC, but interesting part in this kind of project is audio theory, and MEMS microphone performance. MEMS micr
by diimdeep 5y ago
Instead of Pi it could have been a dozen different IC, but interesting part in this kind of project is audio theory, and MEMS microphone performance.
MEMS microphone used here is mp23db01hp
https://www.st.com/en/mems-and-sensors/mp23db01hp.html https://www.st.com/en/mems-and-sensors/mp23db01hp.html
and it looks like better than ICS 43434 that I stumbled on before
https://invensense.tdk.com/wp-content/uploads/2016/02/DS-000069-ICS-43434-v1.2.pdf https://invensense.tdk.com/wp-content/uploads/2016/02/DS-000...
For theory about how microphone works and performs interesting read is
https://www.analog.com/en/analog-dialogue/articles/understanding-microphone-sensitivity.html https://www.analog.com/en/analog-dialogue/articles/understan...
- nyanpasu64 5y agoToday I learned that there are now MEMS microphones which rely on fabricated silicon, not conventional electrical coils or electrostatic/electrets/magnet pickups, to pickup sound waves.
- NavinF 5y agoI believe this is the most common type of microphone today. There’s just not enough space in devices like phones and smart watches for anything else. My SM7B is probably the only non-MEMS mic I own.
- m0lecules 5y ago64dB SNR is pretty standard these days for MEMS – you will pay a lot more to get up in the 70s. Good studio mics will be in the 80dB+ range. Here's the highest performing one today: https://www.digikey.com/en/products/detail/tdk-invensense/ICS-40730/8544631 https://www.digikey.com/en/products/detail/tdk-invensense/IC...