UK English
".... a typical person can safely listen to an (digital music player) for 4.6 hours
per day at 70% volume."
".... knowing the levels one is listening to music at, and for how long, is
extremely important."
From http://www.cbc.ca/health/story/2006/10/19/music-earphones.html
Get the most out of your equipment and enjoy great audio performance even
at safe levels. Our headphones will allow you to hear more details at lower
volume levels than ever before.
Use Responsibly
Do not use headphones when it's unsafe to do so – while operating a vehicle,
crossing streets, or during any activity or in an environment where your full
attention to your surroundings is required. It is dangerous to drive while
wearing headphones, and in many places illegal because it decreases your
chances of hearing life-saving sounds outside of your vehicle, such as another
car's horn and emergency vehicle sirens. Learn how to establish a safe
listening level and review other important safety guidelines from the Consumer
Electronics Association at www.ce.org and the Deafness Research Foundation
at www.drf.org.
5