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 Sound therapy is generally considered as an effective method for relieving tinnitus. There have been various reports on the effects of tinnitus interventions involving sound therapy as a component; however, there have been only a small number of reports on the effects of sound therapy itself on tinnitus.  The aim of the study is to elucidate whether sound therapy significantly improves tinnitus as determined by subjective measurements.  Prospective study involves within-subject (baseline, 3-month, 6-month) measurements.  This includes 1