Our P-i plots now have three dimensions one for each metric of loudness. The master data set, to date, is shown in the following four figures: Fig 16 ( Warned, Muzzle), Fig 17 (Warned, Ear), Fig 18 (Unwarned, Muzzle), and Fig 19 (Unwarned, Ear). Both Warned and Unwarned damage analyses are presented here in unmarked data-space, as the correlation mapping is PEW Science proprietary information. Finally, Warned and Unwarned hearing damage risk analyses of each of the hundreds of waveforms was performed. The computation of the peak positive phase impulse for every shot was performed. The PEW-SOFT system was used to acquire each waveform from each microphone location from each shot. Tests have been conducted indoors and outdoors, and the effects of reflections, temperature, ambient noise, wind, and electromagnetic interference have all been studied and noted. In general, five shots were fired in each weapon configuration, multiple times, over multiple test sessions. “Far Field” and “Non-Standard Muzzle” (2.0 m or 1.0 m right of the muzzle, at 1.6 m muzzle-and-microphone elevation) - These are “control” locations and this data is not currently published. This was done with the shooter present that is, the firearm was fired by a human with the human’s head 0.15 m from the microphone. Muzzle (1.0 m left of the muzzle, at 1.6 m muzzle-and-microphone elevation) - This is the “MIL-STD” muzzle location.Įar (0.15 m right of the right ear, 1.6 m ear-and-microphone elevation) - This is the “MIL-STD” ear location. Sound pressure was measured at the following locations: Many unsuppressed and suppressed firearms, in various calibers and with various silencers, were fired 1.6 m above the ground. The Silencer Sound Standard combines PEW-SOFT data with empirically validated hearing damage models. PEW-SOFT is an excellent tool for generating those. The following are paramount for adherence to this standard:
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