On Sat, Nov 02, 2013 at 11:13:57AM -0700, Eric Carmichel wrote: > It might be fair to state (if this is true) that Ambisonic mics, > in general, tend to be noisier because the noise of four capsules > is additive. That is, noise isn't averaged or subtracted as with > correlation measures made with multiple mics.
In fact it *is*, you gain in S/N ratio by combining the mic signals in the A/B matrix. The W signal will actually be better than any of the individual capsules over most of the frequency range (but unfortunately it also requires some boost above 1kHz or so). Most of the noise will be in the X,Y,Z components as these typically require extra gain, the capsules usually being subcardioid (i.e. the first order component is smaller than the zero-order one, and needs to be amplified to match). The weak point of the Tetramic is indeed the rather flimsy cables. If you find a suitable piece of 5 core + screen flexible cable, the thing to do is to make your own cable with a mini-XLR on the mic end and a full size XLR-6M on the other, going into a single box with the four phantom adaptors. 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 [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
