The aim of this project is to investigate the short- and the longer-term effect of intonation training on vocal characteristics, listener perceptions and patient related outcome measures (PROMS) in gender diverse people using a randomized sham-controlled trial.
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Change in general intonation shift (Hz and ERB)
Timeframe: baseline (before treatment) - at the end of the treatment period (after 4 weeks) - 4 (and 8) weeks after the end of the treatment period (after 8 (and 12) weeks (each measurement +/- 20 min.)
Change in final intonation shift (Hz and ERB)
Timeframe: baseline (before treatment) - at the end of the treatment period (after 4 weeks) - 4 (and 8) weeks after the end of the treatment period (after 8 (and 12) weeks (each measurement +/- 20 min.)
Change in general pitch range (Hz and ERB)
Timeframe: baseline (before treatment) - at the end of the treatment period (after 4 weeks) - 4 (and 8) weeks after the end of the treatment period (after 8 (and 12) weeks (each measurement +/- 20 min.)
Change in pitch variation index (Hz/s and ERB/s)
Timeframe: baseline (before treatment) - at the end of the treatment period (after 4 weeks) - 4 (and 8) weeks after the end of the treatment period (after 8 (and 12) weeks (each measurement +/- 20 min.)
Gender perception of the voice
Timeframe: During a listening experiment (+/- 40 minutes).
Change in patient's satisfaction with their voice - VAS
Timeframe: baseline (before treatment) - at the end of the treatment period (after 4 weeks) - 4 (and 8) weeks after the end of the treatment period (after 8 (and 12) weeks (each measurement +/- 5 min.)
Change in patient's satisfaction with their voice - TWVQ
Timeframe: baseline (before treatment) - at the end of the treatment period (after 4 weeks) - 4 (and 8) weeks after the end of the treatment period (after 8 (and 12) weeks (each measurement +/- 5 min.)
Change in patient's satisfaction with their voice - VHI
Timeframe: baseline (before treatment) - at the end of the treatment period (after 4 weeks) - 4 (and 8) weeks after the end of the treatment period (after 8 (and 12) weeks (each measurement +/- 5 min.)