Microphones for positioning system.

[Sam Jelfs]

theoretically you should be able to use any microphone for this, but I'd guess you would want a small form factor omnidirectional mic. I wouldn't worry about frequency response too much, you can always measure the frequency response in an anechoic chamber (do you have access to ISVR? they must have one...) and just create a transfer function to compensate for any differences across frequency, so long as it's not too appalling. Are you doing the blind source segregation in reverberation? there was an interesting poster at the ASA conference in Paris this year on just such a process...