Thread: Cheap chrono
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Old August 4th, 2006, 04:01   #8
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Join Date: Aug 2004
Location: Calgary
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you don't need 2 mics, one will work fine, just mesure your shooting distance, and the amount of time between the sound of the gun firing, and the sound of the projectile hitting your target and do some math, and you then have your average velocity for that shooting range, but you won't have the actual muzzle velocity.

If you want to be really precise you would have to factor in the placement of your microphone, and the speed of sound at your locations altitude.

or you could get 2 microphones, and have one record the sound of the gun, and the other record the sound of the projectile hitting the target, then record the time beween each noise. and the closer the microphone is to the target and the gun the better.
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