Thread: Suppressor effectiveness - Think about this!

ok seems my last post disappeared into nothingness ( no bad language etc so who knows)
dB is a log scale invented by alexander graham bell's company to pretty much talk about volume on phone lines. however a "bell unit" was way to loud so in came the decibel (1/10th of a bell). ok here it gets slightly techy.
to increase sound pressure (what you hear) increase by 10dB, to decrease what you hear by 1/2 decrease by 10dB
now subsonic loads have no penetration into the supersonic so as they silence only the muzzle "crack" the projectile itself is relatively silent. above the sound of sound although you may silence the muzzle blast the projectile will still make a supersonic wave to hear.
so to give an example a 38 revolver is 138dB, about as loud as a 747 plane at take off, but 128 dB is 1/2 as loud. 118 dB is 1/2 as loud as that again.
it also works the other way add 10dB and its what you perceive as twice as loud, still mazes me that salesmen keep telling me that double the amplifier power = double the volume. well thats what you get when you pay peanuts.
any more question feel free to pm