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Thread: Determining vehicle speed based on sound
face BY : David VanHorn email (remove spam text)

>The extra data will supply the
>information required to resolve the changing engine pitch and perhaps even
>distance as David VanHorn said.

You only need one mic to get distance.

If the car is far, then the slope of the doppler near zero will be very soft.
If the car is close, then the slope is very sharp. More of a transition.

Dave's Engineering Page: http://www.dvanhorn.org
Where's dave? http://www.findu.com/cgi-bin/find.cgi?kc6ete-9

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Subject (change) Determining vehicle speed based on sound

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