Studio microphone with MEMS microphones

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mhelin

Well-known member
Joined
Mar 12, 2005
Messages
748
Location
Tampere, Finland
This is the AD AN-1382, they used 2x16 MEMS omni microphones (analog) to create cardioid "studio quality" microphone by delaying the other  group of 16 mic modules spaced 18mm from each other:

https://www.analog.com/media/en/technical-documentation/application-notes/AN-1328.pdf

74 dBA SNR is not that good. Anyway, the MEMS mics are high-volume parts and under fast development, there are tens of studies and papers about how to improve the technology. Several I found tried to apply positive feedback to improve SNR at lower bias voltage which was kind of interesting subject. Just google "mems positive feedback" for those ones. I guess the threory can be applied to conventional condenser capsules and head amps as well.
 
Upping this thread. sensiBel from Norway thinks MEMS microphones can't be improved much using current technologies so they have invented optical readout MEMS microphone with >= 80 dB SNR.

http://sensibeltech.com/

 
The same tech was developed a few decades ago in Japan. Optical mics. Didn't see much use outside of some Japanese broadcast companies. S/R was phenomenal, but I guess the world wasn't ready to replace every mic preamp and all cabling...
 
Here's the current company:

http://www.optoacoustics.com/industrial/optimic-microphones

Can't figure out if they are Russian, Israeli, Japanese or US. Must be global...  ::)

There are related patents goin' back at least 20 years, from Sennheiser, the US Department of Energy, and a 2011 Chinese one. All more or less the same.
 
Arent DPA miniature mics MEMS types?  S/N is not greatest, but FR is exceptional having in mind the size.

https://www.youtube.com/watch?v=Tk2sfieUXn0&app=desktop

I also recorded few random drum clips with my Samsung S8, which i could easily use as room/overhead takes.
 

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