Can Boom record data that can be used to detect gunfire?
This would be within 1 mile.
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Good question.
I live 1.8kms (just over a mile) from the local Pistol club, with the range pointing this way.
If conditions are right, very light westerly breeze, I can hear the gunfire (usually centrefire, not .22/rimfire) but I’ve never detected it on my RS&B. Keep in mind though, competition pistols use sub-sonic ammunition so there’s no sonic boom from the projectile to detect - just the gunpowder explosion.
We do occasionally hear farmers or hunters discharging centrefire rifles which will more than likely be supersonic ammo. I must check in future if they are detected at all.
A lot depends of the level and frequency of any background noise you have at the RS&B.
Al.
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Thanks… I’d be surprised if it didn’t. I probably just have to figure out the frequency range. I live in Durham NC and it’s pretty common. Sadly.
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If you’re close, look for vertical lines on the spectrogram. From Fourier series we know that impacts, shock waves or any other sudden step or spike includes (in theory) all frequencies.
The further away you are the less high frequencies are left due to attenuation.
Al.
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That makes sense.
I need to go find a shooting range and get some samples. Then see if RBoom nicely sees those frequencies. I’ve been playing with this.
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Most pistol and small bore ranges will shoot with sub-sonic ammo so you’ll only have the chemical explosion noise to work with, so probably won’t have the really low frequencies, but characteristically it will be a line on the spectrogram still.
Not sure a about big bore (centrefire) rifles shooting targets. They cover long distances so maybe they do use supersonic ammo (2). Hunting rifle often use supersonic ammo. and shotguns definitely not supersonic. ;o)
Al.
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