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Tinnitus is a ringing or buzzing noise in one or both ears that may be constant or come and go, often associated with hearing loss.
Tinnitus has a wide-range of causes. Most commonly, it is caused by age-related hearing loss and inner-ear damage associated with loud noises.
Yes and no. Tinnitus is not a sound that is actually perceivable by others, but to the sufferer, it is very real. It is most commonly associated with damage to the tiny hairs on auditory cells within the inner-ear, which causes a faulty signal to be sent to the brain making it think a noise is being heard.
At the moment, there are temporary treatments for tinnitus mostly based around distraction, such as listening to white noise or sleeping with a fan on. There are no permanent cures for the ailment as of yet.
We are working on a potential treatment based around the interference theory of sound-waves. We are trialing a device that will play the opposite wavelength of the sound users report hearing with their tinnitus to try and "cancel" the noise they are hearing.