SDet Wrote:An adjustable gas block with a 7" can will get you hearing safe shooter's ear. But a quieter can will likely allow for even less noise, it will just take more testing.
If you'd like to see a comparison of the whole TBAC line (yes I work there, no I'm not trying to push them, just the only video I know of testing many cans on the grendel) look up Ray Sanchez on YouTube. He also metered just the bolt drop recently, to show how noisy an AR is.
With respect, I am unconvinced any high-power centre-fire suppressor can be made 'hearing safe'. The point being, unsuppressed sound at the muzzle starts around the 175db mark with a good quality suppressor shaving 30-40db's off that. Your own videos are showing suppressed sound at the shooters ear of 140db. International western Worksafe sound levels for all day sound is down around the 80-85db mark. Above this the recommended time limit for unprotected hearing drops. For example 115db for 30secs only. If we leave the .22L and Blackout type cartridges to one side and concentrate on a normal supersonic like the 65Grendel then we're looking at a suppressed sound at the firing point of 130+db. This will damage your ears if unprotected. Damage of course is a cumulative thing so one or two may not be noticeable compared to a range session where you deliberately shoot strings without ear protection thinking 'I paid a lot of money for this' so I'm going to prove that it works and enjoy the comfort of not wearing ears. It may not be noticeable for another twenty years of doing this.
Also bear in mind that the decibel scale is logarithmic, not linear. Differences in db above 120db for example represent a wider range of sound pressures than below 120. Suggesting there is a 5db difference between a 6.5 dedicated suppressor (7.6mm aperture) and a 30cal (8.6mm aperture) is only true if the testing was done with the gun in the same position and the sound meter also in the same position, with the same ambient conditions. And the claim will only be technically relevant for that gun using that ammunition. But, we can still shoot with different suppressors at the time, or over time and say with confidence, 'that suppressor is quieter than this one'. That works for me, but you need to be unbiased and have some experience up your sleeve.
It's difficult thing comparing suppressors but I can only imagine this Tranquilo is trading some sound to mitigate the typical auto-loading spit-in-the-face. If it can cool and slow the gas before it exits then that's great but in that small package I have my doubts.