The guys at Silencer Shop got their hands on a Underground Tactical Little Puff rim fire suppressor which has to be (not) heard to really be appreciated.
The Silencer Shop guys go out of their way to test these suppressors to the same MIL-STD-1474D standard that the military uses to measure potential hearing damage from noise. They use a verified Bruel and Kjaer 2270 sound meter (you do know B&K, don’t you?) placed one meter to the left of the muzzle and 1.6 meters off the ground.
And the results? Well, watch the video, but you may want to turn your volume up so you don’t miss it.