The TA story sounded a little fishy...not that someone would explode a firecracker in a shop...kids will be kids. But there are several things that just sound odd to me:
1) It was an owner that played the prank. I am not naive enough to think that an owner is above such Tom Foolery, but most would not risk such a prank (they see the insurance bill monthly).
2) The AT poster said that the firecracker permanently damaged his hearing. If a firecracker has 150 dBs, then at 10 ft it would reduce to about 140 dBs. Granted this is loud, but unless it is sustained noise, the brief firecracker should not cause such damage. Why aren't there deaf kids running around on the 4th of July or after a rock concert?
3) If the loud noise was so damaging, shouldn't there have been a concussion associated with this from a blast wave? All explosions that I have been associated with that caused hearing loss also had a blast wave with them.
4) Diving makes a hard of hearing person go deaf? I have had a hearing problem for the last 20 years. I have worked around loud machinery, shot firearms without hearing protection (It just wasn’t cool when I was 30 years younger...what you say, I didn’t hear you…you say always wear hearing protection or I might go deaf) and most recently in one night had 79 mortars and rockets impact a small base I was on in Iraq...very loud all night long. I have seen my dive doctor, who is trained in ENT, and she said nothing about going totally deaf from diving. With my diagnosed hearing loss, I have dived more than 200+ dives and still not worse than when I began...according to my audiologist who was a Navy SEAL and a commercial diver.
Maybe by themselves each one of these could be creditable; but when taken together I just don't buy his story.
Now I could be wrong about one or more of my suspensions, but that is the beauty of ScubaBoard...if I am SOMEONE will point out my erroneous ways.
~Oldbear~