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Results from tinnitus evaluations and follow-up questionnaires were used in an effort to assess the efficacy of tinnitus masking units as a means of providing active and/or passive relief for patients experiencing problematical tinnitus. Nine of 34 patients (26%) who were felt to be candidates for masking units reported that they were receiving some form of relief from their tinnitus.
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Roeser et al. (1980) studied this question.
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