Arny Krueger wrote:
"Scott Dorsey" wrote in message

Is it possible to get the mics close enough for this to work with a
broadband sound source?

Depends on the mike and the frequency you're talking about. With 77DXes,
you won't even come close. With small diaphragm condensers you can get
pretty close.

I'm pretty sure that it's impossible because of our inability to make 2 mics
occupy the identical same space at the same time.

Figure how long a quarter wave is at a given frequency and that's the distance
you're worried about. At 20 Khz it's pretty short.

I seriously doubt that a really broadband sound source like keys jangling
would even get you close.

High frequency stuff is more of a problem due to the short wavelength, but
pink noise will cancel remarkably well up to fairly high frequencies.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."