On Wed, Apr 13, 2016 at 06:01:57PM +0200, Bo-Erik Sandholm wrote: > 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.
Only for the W signal. For X,Y,Z you'd gain 4 dB less and then only in a narrow frequency range. As frequency goes down, noise on X,Y,Z will increase by 6 dB/octave. Things will be worse again for higher order. And IIRC, for the Tetramic 19dB(A) is the spec for a single capsule. > 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? When using a solid sphere the diffraction at mid/high F helps to create the wanted directional response. That would not be the case for a 'open' construction. Ciao, -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow) _______________________________________________ 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.
