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Registered
Join Date: Feb 2004
Location: Decatur/Madison, Alabama
Posts: 1,192
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Simplest method to me would be to take multiple samples and average them. You could also toss out any samples that varied widely from the average. Looks like id10T already made the same suggestion.
Since it is sonic you could also think about directional gain from the microphone. Think of the huge parabolic microphones used at sports events as an example.
Looks like Arduino code. It is fun stuff. Some pictures and description of your project would be nice to see sometime.
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Rob Channell
One Way Motorsports
1979 911SC mostly stock 
1972 911T Targa now with a good 2.7 
1990 Miata (cheap 'n easy)
1993 C1500 Silverado (parts getter)
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