John,
Arrays can be tricky and not always suitable for non directional applications.
A signal approaching from the side, on an array mic system, will experience
high frequency loss due to phase cancellation. For example, with two mics and a
1 cm spacing, complete cancellation occurs at 17KHz, and a 6dB loss occurs at
about 8.5KHz. Signals approaching from the front will arrive equally, and would
not experience the phase delay. A trio can about double your frequency response
if arranged symmetrically with minimum spacing because the average distance is
closer.
Bruce Rutkoski
Owner
www.wildtronics.com http://www.wildtronics.com
Professional Parabolic Microphones
---In <> wrote :
That gets confusing when I start with two capsules side by side and then add a
third to make a triangle, in which case the distances between any two capsules
need not change. I am not sure how this might affect phase cancellation.
John Hartog
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