“Sales of MP3 players soared by 200% in 2005 and the market for headphone entertainment continues to grow with portable video players and handheld games consoles. But the trend has prompted concern from Britain’s leading hearing loss charity, the Royal National Institute for the Deaf (RNID). It found 39% of 18 to 24-year-olds listened to personal music players for at least an hour every day and 42% admitted they thought they had the volume too high.”