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<p>Researchers are becoming increasingly interested in the effectiveness of gender-affirming voice (and communication) training. To date, no study has assessed the possibility of a person alternating between feminized and masculinized vocal motor behavior, although this type of demand is growing among non-binary people, artists, and binary trans people. The aim of this article is to determine whether an individual can alternate between two vocal motor behaviors (VMBs), one feminized and the other masculinized, without creating vocal dysfunctions. The assigned-male-at-birth participant-researcher underwent 10 feminizing vocal training of 30 min each, one per week, with another Speech and Language Therapist. Measures were taken in a span of 23 weeks. Three research questions are addressed: (1) How can a feminized VMB be acquired by the assigned-male-at-birth participant-researcher? (2) How does the masculinized VMB change after acquisition of the feminized VMB? (3) How does the feminized VMB change over time if it is not used permanently? The quantitative prospective self-study Single-Case Experimental Design (SCED) was used to assess the acoustic parameters related to fundamental frequency, formants, and prosody at eight different times (four with a feminized voice and four with a masculinized voice), whereas the self-study design allowed qualitative aspects and a proprioceptive description of the VMBs. The masculinized VMB was not affected by the alternating VMBs during the experiment. An upward trend from the first to the last measure times in feminized VMB was observed for the resonance frequencies of the third and the fourth formant (<i>f</i><sub>R3</sub> and <i>f</i><sub>R4</sub>), as well as for the mean resonance frequency (<i>f</i><sub>RM</sub>). Significantly higher parameters were reported in feminized VMB for the length of the vowels (T<sub>vow</sub>), the resonance frequency of the fourth formant (<i>f</i><sub>R4</sub>), pitch (<i>f</i><sub>o</sub>) and its variation in continuous speech (sd_<i>f</i><sub>o</sub>) compared to masculinized VMB. The results show that the participant-researcher was able to acquire a second VMB that was different from the first. The voice of the participant-researcher kept being healthy. In addition, the feminized VMB improved over time as shown by the upward trend observe in some parameters.</p>

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Alternating Masculinized and Feminized Vocal Motor Behavior: A Self-study Single-Case Experimental Design (SCED)

  • 期刊论文

  • 发表日期：

    2025年4月26日

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  • Antoine Henrotin,
  • Fabian Pressia,
  • Dominique Morsomme

摘要

Researchers are becoming increasingly interested in the effectiveness of gender-affirming voice (and communication) training. To date, no study has assessed the possibility of a person alternating between feminized and masculinized vocal motor behavior, although this type of demand is growing among non-binary people, artists, and binary trans people. The aim of this article is to determine whether an individual can alternate between two vocal motor behaviors (VMBs), one feminized and the other masculinized, without creating vocal dysfunctions. The assigned-male-at-birth participant-researcher underwent 10 feminizing vocal training of 30 min each, one per week, with another Speech and Language Therapist. Measures were taken in a span of 23 weeks. Three research questions are addressed: (1) How can a feminized VMB be acquired by the assigned-male-at-birth participant-researcher? (2) How does the masculinized VMB change after acquisition of the feminized VMB? (3) How does the feminized VMB change over time if it is not used permanently? The quantitative prospective self-study Single-Case Experimental Design (SCED) was used to assess the acoustic parameters related to fundamental frequency, formants, and prosody at eight different times (four with a feminized voice and four with a masculinized voice), whereas the self-study design allowed qualitative aspects and a proprioceptive description of the VMBs. The masculinized VMB was not affected by the alternating VMBs during the experiment. An upward trend from the first to the last measure times in feminized VMB was observed for the resonance frequencies of the third and the fourth formant (fR3 and fR4), as well as for the mean resonance frequency (fRM). Significantly higher parameters were reported in feminized VMB for the length of the vowels (Tvow), the resonance frequency of the fourth formant (fR4), pitch (fo) and its variation in continuous speech (sd_fo) compared to masculinized VMB. The results show that the participant-researcher was able to acquire a second VMB that was different from the first. The voice of the participant-researcher kept being healthy. In addition, the feminized VMB improved over time as shown by the upward trend observe in some parameters.