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  hearing aid Glossary
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More commonly referred to as " ringing in the ears " or " head noise, " has been experienced by almost everyone at one time or another. It is defined as the perception of sound in the head when no external sound is present. In addition to " ringing, " head noises have been described as hissing, roaring, pulsing, whooshing, chirping, whistling and clicking. Ringing and head noises can occur in one ear or both ears, and can be perceived to be occurring inside or outside the ear. It can accompany hearing loss. It can exist independent of a hearing loss.

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