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Old April 20, 2011, 05:31 PM   #1
MikeGoob
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anyone know the Decibel level of a .40 compared to 9 and .45?

There used to be a handy dandy caliber decibel chart but I cant find it--any help?

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Old April 20, 2011, 05:42 PM   #2
mikejonestkd
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Here's one:

http://www.freehearingtest.com/hia_gunfirenoise.shtml

hope this helps.
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Old April 20, 2011, 11:52 PM   #3
MikeGoob
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no .40 mentioned in that list.
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Old April 21, 2011, 10:22 AM   #4
Don P
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Try here, http://www.rdth.org/publicHearing200...B%20070417.pdf

And this,
For context -- an increase of 10 dB is roughly a doubling of the sound level, since dB's are measured on a logarithmic scale.

.410 Bore 28" barrel 150dB, 26" barrel 150.25dB, 18 _" barrel 156.30dB,
20 Gauge 28" barrel 152.50dB, 22" barrel 154.75dB
12 Gauge 28" barrel 151.50dB, 26" barrel 156.10dB, 18 _" barrel 161.50dB

.223, 55GR. Commercial load 18 _" barrel 155.5dB
.243 in 22" barrel 155.9dB
.30-30 in 20" barrel 156.0dB
7mm Magnum in 20" barrel 157.5dB
.308 in 24" barrel 156.2dB
.30-06 in 24" barrel 158.5dB
.30-06 in 18 _" barrel 163.2dB
.375 — 18" barrel with muzzle brake 170 dB

.25 ACP 155.0 dB
.32 LONG 152.4 dB
.32 ACP 153.5 dB
.380 157.7 dB
9mm 159.8 dB
.38 S&W 153.5 dB
.38 Spl 156.3 dB
.357 Magnum 164.3 dB
.41 Magnum 163.2 dB
.44 Spl 155.9 dB
.45 ACP 157.0 dB
.45 COLT 154.7 dB

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Old April 21, 2011, 10:39 AM   #5
musher
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which is kinda funny because there's no .40 on that list either.

.40 S&W 156 dB

per http://www.thehighroad.org/archive/i.../t-575643.html
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Old April 21, 2011, 12:04 PM   #6
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Too many variables to answer the OP....ammo, barrel length.
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Old April 21, 2011, 12:30 PM   #7
twobit
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.30-06 in 18 _" barrel 163.2dB Describes my hog gun (Remington 760 carbine 16" barrel) fairly close. VERY loud and a flamethrower at 1am to boot!
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