(CNN)"Hey dude -- can you turn your music down?"
If anyone says this to you while you're wearing your earbuds, take note: You are probably endangering your hearing.
More than one billion teens and young adults are at risk of losing their hearing, according to WHO (that's the World Health Organization, not the rock band).
It's not just old folks who suffer hearing loss. Just by listening to music at what you probably think is a normal level, or hanging out in loud bars, nightclubs and music and sporting events, you can permanently damage your hearing.
By analyzing listening habits of 12- to 35-year-olds in wealthier countries around the world, WHO found nearly 50% of those studied listen to unsafe sound levels on personal audio devices and about 40% are exposed to damaging levels of music and noise at entertainment venues.
It doesn't take much time to damage your hearing at a sports bar or nightclub. According to the WHO, "exposure to noise levels of 100 dB, which is typical in such venues, is safe for no more than 15 minutes."