Journal article
Aerodynamic and Acoustic Effects of Abrupt Frequency Changes in Excised Larynges
Journal of speech, language, and hearing research, Vol.52(2), pp.465-481
04/2009
DOI: 10.1044/1092-4388(2008/07-0212)
PMCID: PMC2665729
PMID: 18695011
Abstract
To determine the aerodynamic and acoustic effects due to a sudden change from chest to falsetto register or vice versa. It was hypothesized that the continuous change in subglottal pressure and flow rate alone (pressure-flow sweep [PFS]) can trigger a mode change in the canine larynx. Ten canine larynges were each mounted over a tapered tube that supplied pressurized, heated, and humidified air. Glottographic signals were recorded during each PFS experiment, during which airflow was increased in a gradual manner for a period of 20-30 s. Abrupt changes in fundamental frequency (F(0)) and mode of vibration occurred during the PFS in the passive larynx without any change in adduction or elongation. The lower frequency mode of oscillation of the vocal folds, perceptually identified as the chest register, had relatively large amplitude oscillation, significant vocal fold contact, a rich spectral content, and a relatively loud audio signal. The higher frequency mode of oscillation, perceptually identified as falsetto, had little or no vocal fold contact and a dominant first partial. Relatively abrupt F(0) changes also occurred for gradual adduction changes, with the chest register corresponding to greater adduction, falsetto to less adduction.
Details
- Title: Subtitle
- Aerodynamic and Acoustic Effects of Abrupt Frequency Changes in Excised Larynges
- Creators
- Eileen M Finnegan - University of Iowa, Communication Sciences and DisordersFariborz Alipour - University of Iowa, Communication Sciences and DisordersRonald C Scherer - Department of Communication Disorders, Bowling Green State University, Bowling Green, Ohio 43403
- Resource Type
- Journal article
- Publication Details
- Journal of speech, language, and hearing research, Vol.52(2), pp.465-481
- DOI
- 10.1044/1092-4388(2008/07-0212)
- PMID
- 18695011
- PMCID
- PMC2665729
- NLM abbreviation
- J Speech Lang Hear Res
- ISSN
- 1092-4388
- eISSN
- 1558-9102
- Publisher
- American Speech-Language-Hearing Association
- Language
- English
- Date published
- 04/2009
- Academic Unit
- Communication Sciences and Disorders
- Record Identifier
- 9984003399402771
Metrics
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