We did an informal sound/dB test two days ago with 4 different versions of the OTB can.
These are NOT official numbers- we did not measure the distance to the shooters ear exactly, nor net it up exactly as they will when the finalized design is tested.
This was just for comparative sake to see where the designs are.
Rifle was a 20” barreled 308 Winchester, using Winchester M118LR ammunition.
Setup-
View attachment 845693
The “ear” microphone was approx 36-40” left of the shooters left ear.
Where the OTB can sits currently, Average of 138 dB-
View attachment 845697
Compared to a TBAC Ultra 7 at 136dB
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And a TBAC Ultra 5 at 140dB-
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4 inches past the muzzle and it is within 2 Db of one of the highest regarded (by a lot of people) 7 inch suppressors on the market. 4 inches added OAL and it’s 2 dB “quieter” than probably the highest regarded 5 inch suppressor.
The goal is to get it in the 135-137 dB range and keep it in that 10’ish oz weight.
Subjective observations:
The TBAC Ultra 5 is barely a suppressor. While it meters at 140 dB it is CRACKY. The first prototype OTB can metered 142dB at the shooters ear on a 16” 223, and sounded
way less obnoxious. The TBAC Ultra 7 and the OTB cans sound totally different to the shooter, to the side, and in front of the muzzle. Maybe the most descriptive way to say it is that- at the shooter and from the side, the TBAC UL7 sounds like a “PPPFFFT” with a crack to it. The OTB can sounds something like “WHOOMP” with a thud to it.
Kind of like this-
View attachment 845705
From the front, the OTB can is barely heard or noticed over the supersonic crack- the “thud” just gos unnoticed. Whereas with most cans from the front, you notice the muzzle crack at least somewhat.
