I'm not a doctor either, but I do not believe that one to three shots fired from a .38 special, .380 or smaller caliber, from within a vehicle would cause permanent hearing loss.
You are wrong.
Any of those cartridges fired in the open would cause permanent hearing loss to some degree. Fired in a closed vehicle the effect would be increased greatly.
Check out this link http://www.freehearingtest.com/hia_gunfirenoise.shtml
to see the various sound pressure levels of many cartridges. Of the 12 center fire pistol cartridges listed the lowest level is 152.4 dB for the .32 S&W long. This is well over the thresh hold to cause hearing loss.
NRA Life Member - Orange Gunsite Member - NRA Certified Pistol Instructor
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