The equivalent noise for a single mems mic is 31 dba, the example using 16 mems would give an improvement of 12 dB getting to 19dBa which is equal to the Tetramic spec.
i have had a idea that have never gone any where, that is to create a true b-format mic and using a number of "normal" mic capsules. Using mems might even be better`? we need a omni and 3 eights to get full FOA. But to create a horizontal b mic we only need a omni and 2 figure 8's. That could be created using a lot (16 or 32) of mems on a single circuit board in one dimension :-) And a number of the mems signals could be reused to create the needed signals, The mems pool signals could be used as insignals to 4 separate beam forming processing channels to create 4 cardoids ( or should we aim for just 2 figure 8ights instead) and one omni channel at the same physical point in space. Maybe we could even use different diameter mic pools for different frequency ranges? i think that using a larger diameter pool of mems would work better in low frequency bands. In addition the virtual mics created would always be centered at the exact same physical location. I am not so certain about the actual mathematics about it, but what would be the result of having the mems distributed along straight lines in a 3 dimensional cross on thin "sticks" instead of a circular flat pool? I think this could be very interesting ways to create mic for different directionality. Bo-Erik 2016-04-13 16:25 GMT+02:00 Marc Lavallee <m...@hacklava.net>: > > I'm looking at this product here: > http://www.invensense.com/products/analog/ics-40300-3/ > > I wonder if mems are good for building an ambisonic microphone... The > document named "Low-Noise Directional Studio Microphone Reference > Design" shows an array of 32 mems. > > -- > Marc > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, > edit account or options, view archives and so on. > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20160413/cade900b/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
