If your interested:

Hearing loss is frequency dependent. The smallest, shortest, hairs which are the weakest, are killed first. Called high frequency roll off. Most of the sound information folks hear is contained in the lower frequency of the sound spectrum, as it has more "information" in it. Computer compression programs such as MPS (cosine transform), change the information to contain the largest amount between the lower range of frequency range. The FBI uses Wavelet compression to reduce storage space in the same manner for fingerprints and keeping profiles of people.

The human hearing system uses a more refined but similar system to pick out sounds from the background. (Cocktail syndrome)

The point is--- folks don't notice high frequency loss as much as low frequency, so claims that one or two shots don't matter is false, as most sound are rarely above 12000 cps.

Unless you play the violin of course.

Or staying alive is more important than hearing your wife nag.

Most people don't have what it takes to get old