Quoted:
I hope their shotgun suppressor works. The second design is looking good.
Update: quieted the Saiga down to 144db. Dunno how good that is for a can. Paging Septic for his 2¢ worth.
check youtube. there are some shotgun suppressors on there.
Both OSHA and MIL-STD-1474D state that hearing protection MUST be used if the sound pressure levels of firearm noise are 140 dB or greater. This is specified in Requirement 4 of MIL-STD-1474D. While it is true that a sound level of 145 dB is not nearly as harmful as one of 160 dB, exposure will still cause damage. Once the damage has occurred, it is forever and will not come back. Further, MIL-STD-1474D has specific requirements for metering equipment, which eliminates the Radio Shack types of meters.
Most supressed AR's are below 140db.