https://www.youtube.com/watch?v=iL2Q2DIX76o
For those who want to see only the results,
Baseline: 170dB+
AAC SR-7: 145dB
SilencerCo Saker 7.62: 148dB
SureFire SOCOM 762-RC: 146dB
Griffin Armament Recce-7: 139dB
Dead Air 7.62 Sandman-L: 141dB
SilencerCo Omega .30cal: 137dB
using on 5.56 rifles,
Griffin Armament Recce-7: 135dB
SilencerCo Saker 7.62: 138dB
SilencerCo Omega .30cal: 136dB
SureFire SOCOM 762-RC: 143dB
Fom: Military Arms Channel