The sound systems at raves and clubs are normally very big and powerful. Whilst it is fun (for some) to dance in front of the speakers, you should be careful about the damage that excessive sound pressure levels can produce. This is measured in decibels (dB's) .

Noise above 85dB for over 8 hours carries a serious risk of causing permanent hearing loss. As the decibels rise, so the safe listening period shortens. At high levels like 145 dB, this is reduced to 7 seconds before hearing loss can occur. Ringing and inner ear tickling is a sign that damage is happening to your cochlear hair cells, so be careful since this damage can be permanent. This can ultimately cause deafness, which might only occurs 10 to 20 years later. This deafness is irreversible and permanent. Taking regular breaks from the dance floor can help but wearing good ear plugs greatly reduces the risks of damage.

Here is a letter from an audiologist that explains this and more.

 

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