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Old 10-13-2013, 05:08 PM   #6
PT Rider
Studly Adventurer
 
Joined: Aug 2009
Location: NW Washington State
Oddometer: 632
Noise exposure over the yeas is one cause; there are several causes.
http://en.wikipedia.org/wiki/Tinnitus

Etymotic Research brand Ety-Plugs at my favorites for riding. I wore the yellow foam E.A.R. Brand plugs for years at work, but don't like their uneven frequency response while riding...I felt disconnected from the bike. In any case, ear plug selection is very individual both for size and type.
http://www.etymotic.com/hp/er20.html
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