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Re: Distance to sound source

Subject: Re: Distance to sound source
From: "Steve Pelikan" <>
Date: Sun, 20 Oct 2002 18:59:37 -0400
Walt:

> > 2) A multi channel processor that computes the bearing and distance to a
> > sound source.
>
> This will pretty much imply a excellent database of mic characteristics
> to have any hope of accuracy. Bearing sounds easy enough, distance will
> probably not be possible unless a standard signal is played and recorded
> at the same time.

Am I missing something? If I can get decent bearings with one pair, and
decent bearings with another (displaced) pair, won't the bearings intersect
at the source of the sound?

I was hoping to use my full complement (4) of microphones and record two on
a DAT and two on a PC, synchronizing the sounds with  clicker of the sort
animal trainers use (I already got one for 59 cents, so don't tell me its
hopeless!) Clicking at each mic would give all the inter-mic distances,
enough to determine their relative locations, (assuming constant speed of
sound).

My plan was to try and chart the motions of a Red-eyed Vireo, say, over a
fairly long time.

Any hints, suggestions, instructions, corrections, comments from all you
knowledgeable types would be greatly appreciated...

Thanks,

Steve P




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