Apple has released a new iPod software upgrade that includes a volume limit for the iPod. You can now set your own volume limit, so that the sound you get from your iPod will not exceed the limit you’ve set.

What’s the best volume limit setting?

“There’s no single volume setting appropriate for everyone. You may experience a different sound level with different earbuds or headphones and with different EQ settings. Some hearing experts recommend that you set the volume while in a quiet environment, turn the volume down if you can’t hear people speaking near you, avoid turning up the volume to block out noisy surroundings, and limit the amount of time that you use earbuds or headphones at high volume.”

Source.