@justmizell
I myself worked the trades for almost 18 years so my hearing is pretty screwed as well so sound quality is a pretty big concern for me due to my hearing loss.
I actually just got my iPhone 5 and it's been my first iPhone since my 3GS was stolen a year ago. I too am at a loss as what to do as far as a case that offered the protection that my iPhone 3GS OtterBox Defender did (now that was a great case) most if not just about all of the iPhone 5 cases on the market have some form of deficiency with the way they are designed!
I ended up buying another OtterBox Defender to get the phone in some immediate protection until I figured out which way to go with the final home for my iPhone 5.
The OtterBox Defender is built like a tank but, I have no idea why OtterBox would completely forgo any protection around the Front Earpiece/Camera cutout and the back Camera Cutout? It does not make any sense what so ever that they would leave these 2 areas completely exposed to the elements and not provide a screen protector shield over these 2 areas.
I mean it's a really nice a solidly built case with the exception of those 2 design flaws. I mean it completely defeats the purpose of wrapping this phone in body armor only to leave those 2 areas open to scratching and chipping

....why otterbox....why?
I have been looking high and low for a solution that provide the same degree of protection that the OTTEBOX 3GS Defender case did and it's just not out there and if it is there are just complaints after complaints revolving around the other cases that are offering something equivalent of the 3GS Defender.
Besides the Otterbox defender the only 2 combinations that I might consider trying is the Element 5 Black Ops with a GLASS tr shield or a TWIG Case with a GLASS tr shield
@justmizell
Anyway, the sound quality on the iPhone 5 Defender Case is the same as a stock iPhone quality if you are wondering and it is a really nice case minus what I said above.