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Health and Safety Information       117
• 
Avoid using headphones after exposure to extremely loud noises, such 
as rock concerts, that might cause temporary hearing loss. Temporary 
hearing loss might cause unsafe volumes to sound normal.
• 
Do not listen at any volume that causes you discomfort. If you 
experience ringing in your ears, hear muffled speech or experience 
any temporary hearing difficulty after listening to your portable audio 
device, discontinue use and consult your doctor.
You can obtain additional information on this subject from the 
following sources:
 
American Academy of Audiology
11730 Plaza American Drive, Suite 300
Reston, VA 20190
Voice: (800) 222-2336
Email: info@audiology.org
Internet: 
National Institute on Deafness and Other Communication 
Disorders
National Institutes of Health
31 Center Drive, MSC 2320
Bethesda, MD 20892-2320
Email: nidcdinfo@nih.gov
Internet: 
u350.book  Page 117  Thursday, February 26, 2009  3:11 PM