Great info Josh.

If un-modified gas systems run 146-148 dB at the ear suppressed and the mechanical noise floor is 116-123 dB,
what at ear dB numbers are possible using either optimized adjustable gas systems or advanced/flow through suppressors?



Quote Originally Posted by paco ramirez View Post
Yes, they do and they're all traditional silencers, though usually shooting 5.56 through a 7.62 bore can be expected to drop the ear numbers a bit depending on the silencer. Also some silencers just aren't optimized for supersonic use, like the Trash Panda. The testing was intentionally done with a fixed gas system as a worst case scenario. The ear SPL can be remedied with an adjustable gas block when using a traditional silencer. But like someone else said earlier, PDs won't want to do that.

An AR15 bolt closing on an empty chamber is 122.9dB, closing on an empty mag is 122.8dB, and closing on a live round is 116.6dB as measured by Thunderbeast with a proper meter and correct mic location.

Suppressed Nation will be doing more testing in the future with their Pulse meter, including some "flow bypass" type silencers I'd assume. They're limited by what Hansohn Bros stocks and what they currently own themselves.