iPodの音は低めに

USA TODAY Snapshotより抜粋。

Sounds to rock the earthdrums (in decibels)
Car stereo - 125
iPod on high - 115
Boon bos - 100

The safe exposure limit for noise is 85 decibels for eight hours a day.
Every time the volume level increases by three decibels, the safe exposure time drops by half.

ウォークマンで耳が悪くなったので、iPodは欲しくても買わない。