Tinnitus is a common and distressing condition affecting about about 17% of people. Tinnitus Retraining Therapy (TRT) involving a combination of sound therapy and councelling has proved to be the most effective and most widely practiced tinnutus treatment worldwide with sucess rates of about 80%. Jastreboff created the Tinnitus Retraining Therapy model in 1990 and since then it has become the authority on tinnitus.