Ok, so here's the situation. I've googled and googled and haven't found an answer to my question. There's supposition and arguing, but nothing definitive. I have 3 firearms chambered in .357/.38 special. What I'm curious is what effect the barrel length will have on different powders, using the same cartridge, albeit within different firearms. I want to know how the noise levels will differ between them This is the only forum I could think of to post this question. Where could I get a decibel meter that could measure these kinds of sounds for the least money. If I find anything useful, I'll make sure to send the results out.
Decibel Meter on the Cheap?
- Thread starter chewie146
- Start date
Steviewonder1
New member
If you have an iPhone there are a few sound meters and sound pressure meter apps out there.
Aguila Blanca
Staff
Radio Shack.
50 clams.
http://www.radioshack.com/search/in...und-level meter&origkw=sound-level+meter&sr=1
50 clams.
http://www.radioshack.com/search/in...und-level meter&origkw=sound-level+meter&sr=1
I had a Radio Shack meter and it worked pretty well. I did some sampling and then had an Industrial Hygienist come in and my cheap meter was dead on to his more expensive model. So, it should work for what you need, but I would be careful using it for a hearing protection program.
Pointshoot
New member
That meter goes to 130 dB and firearms register considerably higher:
http://www.freehearingtest.com/hia_gunfirenoise.shtml
I have no idea how far away the firearms were from the test instruments, but if it were me I'd keep this in mind. I'd get some distance from the muzzle of the gun, at least the first times I tried using the sound meter.
And if you haven't already done so, I'd study up on the nature of sound measurements. A 10db difference in sound level is considerable.
Please let us know how it all works out. I'd be curious to hear how a .357mag and 45colt compares as measued by that meter.
http://www.freehearingtest.com/hia_gunfirenoise.shtml
I have no idea how far away the firearms were from the test instruments, but if it were me I'd keep this in mind. I'd get some distance from the muzzle of the gun, at least the first times I tried using the sound meter.
And if you haven't already done so, I'd study up on the nature of sound measurements. A 10db difference in sound level is considerable.
Please let us know how it all works out. I'd be curious to hear how a .357mag and 45colt compares as measued by that meter.
Last edited:
Yeah I'm going to have to do some shopping around. Maybe there's a geek trade show or something around here. It's a geek town, and I'm a certified geek. I'm hoping to find one that not only goes higher but is capable of measuring impulse noise. Most sound meters measure repeated noises, etc. You can measure the peak of a series of gunshots, but I'm hoping to use a contender. Maybe the guys at silencertests have a line on a good one.
Pointshoot
New member
This sounds like a really interesting project.
After experiencing a little high frequency hearing loss while hunting geese (it was in the winter & my stocking cap somehow interfered with the seal on my electronic ear muffs) - - I've been very aware of the effect of gun blast. Its pretty tough to hunt or be at your best in a defensive situation, if youre deaf.
Among my favorite handgun cartridges are the 45 Colt and 44 Special because they get the job done very well, without a lot of blast or fuss.
I look forward to your results.
P.S. - - it would be interesting to test some ammo advertised to offer lower flash and blast, to see how they actually measure up. I like the Speer Gold Dot 45 Colt commercial load. Modest velocities and muzzle blast - but they open up at slow speeds and penetrate well.
After experiencing a little high frequency hearing loss while hunting geese (it was in the winter & my stocking cap somehow interfered with the seal on my electronic ear muffs) - - I've been very aware of the effect of gun blast. Its pretty tough to hunt or be at your best in a defensive situation, if youre deaf.
Among my favorite handgun cartridges are the 45 Colt and 44 Special because they get the job done very well, without a lot of blast or fuss.
I look forward to your results.
P.S. - - it would be interesting to test some ammo advertised to offer lower flash and blast, to see how they actually measure up. I like the Speer Gold Dot 45 Colt commercial load. Modest velocities and muzzle blast - but they open up at slow speeds and penetrate well.
Sorry I guess I wasn't clear when I said "map them".
I didn't mean take several reads & average them, I meant you need to take several readings at different points & then average those readings so you get an idea of where each position rates for noise. Usually the meters have some kind of attachment so you can put them at different points in front of, to the sides of & behind the gun safely. Then you actually draw a "map" of the sound patttern. If you don't do this you'll never know "how loud" it is because the percieved loudness will vary with location & distance.
You should end up with something like this, distance from center is "loudness" & directioin is from the source to the meter's mic. Yours won't be this complex as you're just measuring one parameter, overall noise.
I didn't mean take several reads & average them, I meant you need to take several readings at different points & then average those readings so you get an idea of where each position rates for noise. Usually the meters have some kind of attachment so you can put them at different points in front of, to the sides of & behind the gun safely. Then you actually draw a "map" of the sound patttern. If you don't do this you'll never know "how loud" it is because the percieved loudness will vary with location & distance.
You should end up with something like this, distance from center is "loudness" & directioin is from the source to the meter's mic. Yours won't be this complex as you're just measuring one parameter, overall noise.
Last edited:
Actually, I was more concerned about perceived loudness from the point of the shooters ears. So maybe taking readings on either side of my head. The only thing is trying to replicate the ear, because that funnels sound back into the ear canal. Downrange I could care less how low it is.
I'm thinking about just renting one for a week or weekend. Maybe this is a good project for the winter when the days are nice and still around here. No wind, etc. Cold air would probably make a difference in how the sound travels, but would it affect the sound reaching the mic on the meter? In cold air, the speed of sound is lower, correct? I've got a fair bit of research to do before I get all this underway.