Gender Perception After Raising Vowel Fundamental and Formant Frequencies: Considerations for Oral Resonance Research

Voice feminization therapy for male-to-female transgender women typically targets increasing fundamental frequency (F0). Increasing vowel formant frequencies (FFs) has also been proposed. To better understand formant conditions that shift listeners' perception of gender from male to "not-male," individual and combined vowel FFs were incrementally raised, whereas F0 was held constant at a gender-ambiguous level.

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