Apple Watch noise

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taliv

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Apple Watch has a noise meter I just noticed. Seems to work pretty well. Let’s you know when ambient noise reaches levels that are unsafe for hearing.

I’m curious if anyone used it so far at a gun range.
 
Finger snap peak noise is a couple orders of magnitude slower.

Even the first shot-spotter systems had to be tweaked for a while to get them to sense fast enough to detect gunfire accurately.

So... I bet the watch app is not set up to sample fast enough. But it probably could be. Worth trying.
 
Finger snap peak noise is a couple orders of magnitude slower.

Even the first shot-spotter systems had to be tweaked for a while to get them to sense fast enough to detect gunfire accurately.

So... I bet the watch app is not set up to sample fast enough. But it probably could be. Worth trying.

Hmmmmmm something that could detect gunshot noise coupled with a built in gps. Can we have these installed in the Ankle monitors some people have to wear?
 
Finger snap peak noise is a couple orders of magnitude slower.

Even the first shot-spotter systems had to be tweaked for a while to get them to sense fast enough to detect gunfire accurately.

So... I bet the watch app is not set up to sample fast enough. But it probably could be. Worth trying.


https://physics.stackexchange.com/questions/118601/what-is-the-duration-of-a-snap measured a snap at 1ms

depending on how you measure the "peak" (which is obviously only a point at the "peak") you could say it's practically at least .1-.2 ms long

sampletrace1.gif
 
screenshot of watch at ambient in indoor gun range with just me and the Ventilation system.


0421A03F-01C1-424C-B4E7-F932EDD5239A.png

Screenshot of watch after firing unsuppressed
E3D83745-9E73-4BDE-A7D6-4B78F559C78B.png



Test gun. Brand new SMITH AND WESSON 22 with antique YHM mite suppressor.
(edited, thanks Mal)

09BDE3D8-4185-4F60-97D6-4F3AFC76931D.jpeg




Screen shot of watch a second after firing suppressed
8A1052FD-9C4E-4ADF-BFB8-1A9C9EC8F576.png
 
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Yeah, that’s way lower than what it should be reading. A .22 pistol with subsonic ammo (most .22 ammo is subsonic out of a pistol) is going to be around 120 dB in most real-world tests. And it’s not surprising it’s so far off: I had a customer use a dB meter designed for measuring harmful noises at construction sites and he tested it with my 10.5” SBR both suppressed and unsuppressed. It also read way lower than it should have when you compare common tests done with proper silencer-grade dB meters. I’m guessing those kinds of dB meters just can’t handle the quick impulse of a gunshot.
 
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It’s probably sending that info to a database. Apple is anti gun.

(Takes of tinfoil hat.).

I mean cool! That could be useful.


And with the knowledge that some of us own guns (which is ostensibly known if we post on this forum, and doubly so if we make those posts from an Apple device) Apple could do what, exactly?
 
Interestingly placing the watch in front of the muzzle or behind the gun consistently gets the same reading.
 
It’s probably sending that info to a database. Apple is anti gun.

(Takes of tinfoil hat.).

I mean cool! That could be useful.
apple isn't nearly as bad as google regarding data privacy

besides, the data would just be the volume of sound, not the actual sound.
 
Yeah, these things are mathematically averaged.
I had an app on the phone so I could know if a given (construction) area's noise warranted hearing protection.
The app routinely under-reported sound levels when checked (which I suspect has to do with the "flattening" effects of many microphone software installations, and not specifically the app).

Note, too, above, where the watch's app is reporting numbers below 120 dB, well under what many suppressor manufacturers label as "hearing safe" e.g., <140dB. Please recall that dB follow a logarithmic scale, so 20dB is a very big deal.
 
https://physics.stackexchange.com/questions/118601/what-is-the-duration-of-a-snap measured a snap at 1ms

depending on how you measure the "peak" (which is obviously only a point at the "peak") you could say it's practically at least .1-.2 ms long

View attachment 876487
That's the pressure inside the barrel. Almost all the "noise" in gunfire is the over-pressure at bullet exit, that is much shorter in duration.

Similar, audio traces done on handguns show that the duration seems to be about 1 to 1.5 millisecond as well.

A big long paper on the subject.
 
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