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Hey, you guys are giving good advice but being deaf myself (i have a 90 decibal hearing loss) and I go to school for audiology so this is pretty much my area.
What you are talking about is called Temporary Threshold Shift (TTS). This is when your ears adjust to the constant high decibal level that is blasting out of those speakers. You know those tiny ass bones in your ears? What happens is there are muscles that are attached to those bones that tighten up so the bones don't move as much. This causes the bones to not push the cochlear fluids as hard, causing a decrease in hearing threshold (you hear everything softer). It's your body's own way of dealing with the constant high decibal level.
What happens is when you get out of the club, into normal levels, your muscles remain tight on the bones, causing them not to move as much and causing your hearing to remain at a lower level. Eventually the muscles ease up and your hearing returns to normal as the ear realizes that it doesn't need to take the precautionary methods to protect your hearing.
However, over time it will take longer and longer for your ears to get re-adjusted and go back to normal levels. If this keeps continuing, you will get what we call a Permanent Threshold Shift (PTS). Just like TTS you will have a constriction on the hearing apparatus causing you to be able to deal with the constant loudness. However once you get PTS, it never goes back. As its getting longer and longer for your ears to adjust to the normal levels outside of a club or your headphones, soon enough they just won't adjust leaving you with a hearing loss probably in the mild to moderate range (30-45 db hearing loss).
You will also find that the frequency of your hearing loss will match the frequency of the noise that is hurting your ears. Hence a mother listening to her baby cry all day long on her shoulder next to her ear will have a hearing loss around 1k-3k freq range since the baby's voice is that high.
The musical earplugs are definitely the way to go. While blocking out all the loudness they still allow for some frequencies to pass through so you can hear much better with them rather than normal earplugs.
As for me, when I dj or go to clubs I got hearing aids that just put a cap on the peaks of the levels im listening to so I can listen to shit as loud as i want hehe (thank god for compression!) But trust me, as cool as technology in hearing aids are, buying the earplugs and not losing your hearing in the first place is definitely the way to go.
You can pm me anytime about this stuff, its what I go to school for heh. Hope it helps you understand whats happenin in your ears.
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