- The Maximum output of an MP3 player such as an iPod can get up to 115 decibels, which can cause permanent hearing damage in as little as 8 to 15 minutes. Two ways to reduce the risk: Stay away from in the ear headphones, which sit much closer to the ear drum and can get much louder, and use the 6060 rule. No more than 60 of maximum volume for 60 minutes at a time and then take a break. Ears that get a rest are less likely to get damaged.