Now here is something that I did not know I wanted to know. This video, courtesy of Lone Star Boars (YouTube channel here), showcases the noise of gunshots from suppressed weapons at the targets point of view including hits and misses (the report of the firearm only). Calibers included in the test include 6.8 SPC, 300 BLK, .45 ACP, and the ol’ stand-by: 5.56.
The subsonic weapons are particularly impressive, especially considering the energy in the .45 ACP.