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Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody
Published on: September 27, 2024
[Perceptive evaluation of substitution voices: the I(I) NFVo rating scale]
M Moerman1, J P Martens, L Crevier-Buchman
1Institute of Phoniatrics, University Medical Centre Utrecht, Utrecht, The Netherlands. mieke.moerman@tiscaali.be
Objectives:
Evaluation of a perceptual specific rating scale for specific severe non laryngeral dysphonia.
Material And Method:
113 speech samples from substitution voices were scored perceptually according to the IINFVo scale: overall quality impression (I), impression of Intelligibility (I), additive and unnecessary noise (N), speech fluency (F) and presence of voiced segments (Vo). Each parameter was scored on a visual analogue scale from 0 (minimally deviant) to 10 (maximally deviant substitution voicing). These samples were presented to semi-professional jury-members (second grade speech therapy students) and professional jury-members (phoniatricians and speech therapists, specialised in the oncological field).
Results:
Interindividual agreement between semi-professionals was moderate (0.57-0.68). Interindividual agreement between professionals was higher (0.82-0.86). These figures are similar or even better compared to the classical perceptual evaluation scale for laryngeal speech (GRBAS).
Conclusion:
Our study suggests that the I(I)NFVo rating scale is suitable for perceptual evaluation of substitution voicing and consistency results are comparable with the classical perceptual rating scale (GRBAS).
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