A voice assessment was performed before and after conservative voice treatment in 3 male-to-female transsexuals and in 2 nontreated transsexuals serving as control persons. The characteristics studied were voice quality, habitual speaking pitch, vocal pitch range, vocal intensity range, maximum phonation time and ‘communicative impairment’, a subjective self-estimation by the patient. Based on these parameters the Friedrich dysphonia index (DI) was calculated. The habitual speaking pitch of the 3 transsexuals who had received voice treatment became female, in contrast to that of the nontreated transsexuals, which remained in the so-called ‘indifferent pitch range’. The DI of the treated patients was close to the normal value, in contrast to the DI of controls, which continued to be pathological. Even based on this small population, study results reflected the effectiveness of voice therapy in transsexuals.
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