Tinnitus is the perception of sound in the head or ears in the absence of an actual sound source, and it is often described as ‘ringing’ or ‘buzzing.
Most people who are diagnosed with tinnitus have some degree of hearing loss but the exact cause of tinnitus is not fully understood. It is thought that – as the damaged cochlea hair cells do no send their information as effectively as they should that the hearing centre of the brain overcompensates for the missing information by generating its own sound.
As a result, a ‘phantom’ sound – ringing or buzzing – is perceived. The volume of tinnitus can range from barely audible to loud enough to be bothersome or even debilitating.