mhelin

Studio microphone with MEMS microphones
« on: April 21, 2019, 07:57:46 AM »
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.
Mikko


mhelin

Re: Studio microphone with MEMS microphones
« Reply #1 on: May 15, 2019, 06:12:30 AM »
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/

Mikko

cyrano

Re: Studio microphone with MEMS microphones
« Reply #2 on: May 15, 2019, 04:57:42 PM »
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...
Why is it people love to believe and hate to know?

cyrano

Re: Studio microphone with MEMS microphones
« Reply #3 on: May 15, 2019, 05:10:10 PM »
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.
Why is it people love to believe and hate to know?

Re: Studio microphone with MEMS microphones
« Reply #4 on: May 17, 2019, 03:04:44 PM »
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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