TinnitusTinnitus is the audible activation of perceived sound, usually a buzzing or hissing noise where there is no external sound. It can be constant, pulsing, one-sided, intermittent and often aggravated by over stimulation, such as stress. It may prevent us falling asleep at night or affect our concentration.

Sensitivity to loud sounds occurs with or without hearing loss. Sounds can be difficult to hear at a soft level but with a small increase in intensity will sound very loud. This may or may not be associated with tinnitus.