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The tri-amping technique is widely used to keep a flat response in the entire audio spectrum.
A similar aproach can be used to get a flat response for recording audio, from three (or more) low cost microphones; may be dynamic for bass and mid-range and electret for trebles. The tri-miking could be
done putting all together in one single unit taken care of phases. One filter per band is needed, and the outputs of the filters must be added, with individual gains adjusted for maximum linearity. Of course, the tri-miking is not suitable for very close takings.
Cochlear microphone [piluso, Nov 18 2012]
||I keep reading this as Tri-milking.
||//One filter per band is needed, and the outputs
of the filters must be added//
||Why not keep all
three channels separate? Filters distort phase, and
information is lost when
signals are added; it is impossible to reconstruct
the original exactly. Just send the three signals
directly to the three speaker elements (or
combine them if the reproduction system does
not support that).
||As I've said before, it's all just data now, and there
is no longer any need to mix down audio to some
standard. Just include appropriate meta data and
let the software handle it.
||//Filters distort phase//
The mics must be acoustically arranged, in a way that phases doesn't cancel after filtering and summing
// Just send the three signals directly to the three speaker elements//
I was thinking for using for recording, as low cost alternative. No data, pure analogue at this stage.
//I keep reading this as Tri-milking//
My no-native, bad-learned english can cause some side effects in some readers. I just hope don't seem rude or offensive unintentionally :-)
||^and misreading Titles is an occupational hazard.
||I keep trying to think why this won't work: nothing so far.