Ringing in the ears, also called tinnitus, is not caused by an external sound. It can sound like ringing, but also a buzz, hum, whistle, or other sounds that no one else can hear, except in rare cases ...
Sgt. Oscar Portillo, Marine Corps security guard, visits the hearing test booth operated by Mike Rodriguez, Naval Health Clinic Quantico audiology technician, during his post-deployment health ...
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