On Sun, Jan 06, 2013 at 09:18:43AM +0000, Chenrilin wrote: > Hello, all > I have designed an array of four microphones to get B-format signal. The > coordinates of mics > are mic1 (-d/2,0), mic2 (d/2,0), mic3 (0, d/2), mic4 (0,-d/2),and d is about > 18mm.Every opposite > pair can be composed into a first order differential array and get a pattern > of figure 8. So the X > component can be got from mic1 and mic2, the Y component can be get from > mic3 and mic4. > The W component equals to the mean of signals from four mics. Then I decoded > them to get the > feeding signal for four loudspeakers, and used HRTFs to get the left and > right signal for headphone. > > > 1. Furthermore, the experiment is made that a person was walking around > the array and say > something in an office. After processed by the method above, I find there is > a problem that > the speech sounds like a person talking and moving around my head but very > near to my ears > and head. What is the main reasons for this problem? Is there any suggestion > to make it sounds > much further from the ears and head. > > 2. Do I need to add the early reflection and late reverberation to the > four loudspeakers? In my > understanding, the recording signal of array has included the reflection and > late reverberation > signal of the office. If add another reflection signal to the feeding signal > of loudspeakers, they > will contain two kind of reflection signal. Is my understanding right? > Apologize for this simple question.
We'll need a bit more information. * Are the mics omnis, or directional ? If directional, what are the directions ? * How exactly to you compute X and Y frm the mic signals ? * Does the decoding work on speakers (without HRTF) ? 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
