Effects of Tinnitus Retraining Therapy with Different Colours of Sound.

Background: In Tinnitus Retraining Therapy (TRT) sound stimulation is conventionally performed with low-level broadband sound generators; since the patient has to receive it for many hours in a day, it is important that the sound is tolerable and agreeable to the patient. A clinical trial was undertaken to evaluate the effect of different colour sound generators on tinnitus. The colour of a sound refers to the power spectrum of the signal.