On 05/24/2012 11:57 AM, Augustine Leudar wrote:
Hello all, I am building a six capsule ambisonic microphone. I have been told that with the opposite capsules (ie up/down, left/right, forward/backwards) I should invert the phase of one of the channels and then add them to get the X,Y,Z for the ambisonic b format. I've been struggling to find a good explanation - I was wondering if anyone could explain why this is in detail ?
if this is not obvious to you, then i'd recommend to do some more research before you spend lots of money on parts and lots of time on assembling the mike.
what you are trying to do sounds like a "native" b-format microphone, but made from individual cardioid capsules. to get a figure-of-eight (which has one in-phase lobe and another with inverted polarity), you can subtract two back-to-back cardioids, which is just the same as adding them with one of the capsules inverted.
best, jörn -- Jörn Nettingsmeier Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487 Meister für Veranstaltungstechnik (Bühne/Studio) Tonmeister VDT http://stackingdwarves.net _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
