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Safety
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For information about hearing aids and digital wireless phones
http://www.accesswireless.org/
http://tap.gallaudet.edu/Voice/
http://www.fcc.gov/cgb/dro/hearing.html
http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-03-168A1.pdf
http://hearingloss.org/content/telephones-and-mobile-devices
Caution: Avoid potential hearing loss.
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