Conference proceeding
Effects of supraglottic compressions on the aerodynamics and acoustics of excised canine larynges
Proceedings of Meetings on Acoustics, Vol.19(1)
ICA 2013 Montreal
06/02/2013
DOI: 10.1121/1.4793640
Abstract
The purpose of this study was to examine the aerodynamic and acoustic effects due to supraglottic compressions, which may be seen in some dysphonic patients. Canine larynges were prepared and mounted and vocal fold oscillations were generated and controlled by the flow of air through the glottis. Glottal adduction was accomplished by rotating the arytenoids with a suture passed behind the vocal folds to simulate lateral cricoarytenoid muscle action. Supraglottic medial and anterior-posterior compressions were accomplished by manual squeezing at the arytenoid level and alternating between the rest and compressed conditions. The raw data, including EGG, subglottal pressure, flowrate, and microphone signals, were recorded on a DAT tape and later digitized and processed with Matlab. A video image of the superior aspect of the larynx was recorded using a stroboscopic light during the whole experiment. Results indicated that the excised larynges oscillated better and easier without the false vocal folds, but generated louder sound with false vocal folds. Medial compression always resulted in increased subglottal pressure, decreased flow rate and most often increased the sound intensity, but decreased EGG closed quotient. Both of these compressions had negative effects on the amplitude of EGG signal, suggesting disruption of vocal fold contact
Details
- Title: Subtitle
- Effects of supraglottic compressions on the aerodynamics and acoustics of excised canine larynges
- Creators
- Fariborz Alipour - University of IowaEileen Finnegan - University of Iowa
- Resource Type
- Conference proceeding
- Publication Details
- Proceedings of Meetings on Acoustics, Vol.19(1)
- Conference
- ICA 2013 Montreal
- DOI
- 10.1121/1.4793640
- ISSN
- 1939-800X
- eISSN
- 1939-800X
- Number of pages
- 5
- Language
- English
- Date published
- 06/02/2013
- Academic Unit
- Communication Sciences and Disorders
- Record Identifier
- 9984258740602771
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