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Tuesday, January 17, 2006

· Mobile digital music players are too new a phenomenon, and hearing damage too slow a process, to say that the devices are causing hearing loss.

· Volume and length of exposure both contribute to hearing damage. Some experts say to limit portable listening to an hour a day at no more than 60 percent of maximum volume, but ambient noise may make it difficult to keep volume down.

· Upgraded headphones or earbuds, which cost more than standard versions, permit listening at lower volumes.

· Other things being equal, headphones are less likely to do damage than earbuds.

· Officials at Apple, maker of the iPod, will not comment on the hearing damage controversy.

· Two tests suggested by experts: Your music is too loud if (1) someone three feet away in an elevator can hear your music; or (2) you have to turn your music down to hear someone talking directly to you.



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