Interesting thread this...
I abused my ears for quite a long time... Working as a DJ, going to parties with mates who did, and still do, DJ (and freakily enough a tune made by a couple of them just played out on Radio 1 as I write this) - all standing within a few feet of monitors or stacks dishing out anything between 1,000 and 40,000 watts RMS; getting too 'into' tunes at after-parties or at home, with Sennheiser HD25s cranked as high as they'll go, or sat in the studio particularly pleased with part of a creation, looping a few bars at excessive volume; and then when I had the A3 I spent more money than I care to think about building a rig that would be both very loud and at the same time almost reference quality.
...Now I'm paying the price for it. My left ear does all kinds of weird things - I get a pitch-sliding sine wave sound in there every now and then, I often have a constant sine tone in there at night if I have that ear on a pillow, all kinds of stuff. I know the right ear probably isn't far behind it too. I'm quite confident I have marginally reduced hearing in the mid-range in both, and unless I'm careful that's only going to get worse.
Tinnitus is a nasty condition, and I wish I'd known a bit more about the relatively easy ways to cause it, and more crucially, the grim symptoms it has before I'd been so careless.
Readers of this may or may not know, that it only takes a few minutes of exposure to anything at 80-85dB or above to cause irreparable damage to hearing. The best part is that it doesn't show itself for a good while after.
All this talk of figues like 165dB is positively scary. The decibel scale isn't linear, it's logarithmic - what that means in effect is that for each 10dB you go further up the scale, the sound has multiplied considerably in volume. A sound at 10dB is 10 times louder than one at 0dB. A sound at 20dB is 100 times louder than one at 0dB.
It's reckoned by a lot of researchers, charities and others who have proven knowledge of hearing problems, that in the average pub on a busy night you've only got one to two hours exposure time without hearing protection before you're doing damage. Further to that, you could have used up your 'daily exposure limit' before you set foot in the place by simply driving fast with the window open along with one or two other seemingly minor, everday noises. Just to put it into context, in the average club, if you walk through the door having used none of your daily exposure time, you've got around 4 minutes without hearing protection before you're doing damage.
Guys and gals, in all seriousness, if you're exposed to decent amounts of noise from time to time; get some basic ear-plugs at the very least. If you go to Boots and look for ER20s, you're on the right track. They'll only set you back about £20 but they may just save you years of pain and mental torment... If you're exposed to a lot of noise regularly and unavoidably, go and get some custom-moulded ones made.
As one tinnitus-suffering friend of mine said to me as I was first realising the risk to my hearing, if you follow this advice, you'll never thank me for it; but if you don't, you're likely to spend years wishing you had.
Be careful with your ears folks, because if you're not, one day that little ringing, or fuzziness you noticed in your hearing as you left the bar/club might never go away...
Regards,
Rob.