Some data:
12 Gauge
28" barrel 151.50dB
26" barrel 156.10dB
18" barrel 161.50dB
Rifle
.30-06 in 24" barrel 158.5dB
.30-06 in 18" barrel 163.2dB
http://www.freehearingtest.com/hia_gunfirenoise.shtml
1db is the smallest volume increase a person can hear.
3 dB = twice as much power, noticeably louder
6 dB = 4 times as much power, significantly louder
6 dB = twice the amplitude
9 dB = 8 times the power, nearly twice as loud
10 dB = 10 times the power, twice as loud
The intensity of the sound will go up exponentially. Your ears hear that exponential increase in pressure as a linear increase in volume. A 12 ga hits your ears 10 times as hard when you cut the barrel from 28 to 18". A .30-06 hits your ears about 4 times as hard when you go from 24" to 18".
Long barrels are a very good thing. They maximize velocity and minimize sound pressure levels.
12 Gauge
28" barrel 151.50dB
26" barrel 156.10dB
18" barrel 161.50dB
Rifle
.30-06 in 24" barrel 158.5dB
.30-06 in 18" barrel 163.2dB
http://www.freehearingtest.com/hia_gunfirenoise.shtml
1db is the smallest volume increase a person can hear.
3 dB = twice as much power, noticeably louder
6 dB = 4 times as much power, significantly louder
6 dB = twice the amplitude
9 dB = 8 times the power, nearly twice as loud
10 dB = 10 times the power, twice as loud
The intensity of the sound will go up exponentially. Your ears hear that exponential increase in pressure as a linear increase in volume. A 12 ga hits your ears 10 times as hard when you cut the barrel from 28 to 18". A .30-06 hits your ears about 4 times as hard when you go from 24" to 18".
Long barrels are a very good thing. They maximize velocity and minimize sound pressure levels.


















































