More likely you would lose it by NOT dancing, but by listening too much with the volume turned up on your iPod or iPhone, or other devices, because many of the earbuds in use aren’t very effective so people turn up the volume. Studies have found that users of these Apple devices can be listening at 100-105 decibels. This is well above the OSHA-recommended 85 decibels.
Remember, ears that get damaged stay damaged. They can’t be repaired. And when people talk about decibels (dBA), which is how loudness is measured, we need to remember that they are logarithmic, so that a small increase in the number means a big increase in the noise level (adding 10 dBA DOUBLES the noise level). In the case of dancers, OSHA’s estimate of 110 decibels for discotheques means that the well-advised dancer should limit their dancing in such establishments.
Fortunately, loudness meters—either standalone models or apps for smartphones—are not expensive, and the serious dancer shouldn’t worry about looking a bit geeky using them. More simply, he/she can always carry earplugs, and use them when things get too loud. It’s a lot better than suffering hearing loss for the rest of his/her life.