Originally Posted by
Todd.K
As best as I can figure, the “suppressor rating” is some secret formula math project. Thus nobody can replicate it, nor understand how the formula is weighted.
It appears to be some combination of time, frequency, and sound pressure level.
Something like this is used in industrial hearing safety for exposure limits that include duration. It is suitable for hearing protection concerns over a work shift, may be suitable for how much .22 or subsonic 9mm is actually hearing safe, but it is not an effective way to measure how loud something “sounds” to the human ear.