Effects of Angle of Epiglottis on Aerodynamic and Acoustic Parameters in Excised Canine Larynges
| Autor: | Jim R. Lamb, Huijing Bao, Yanchao Jiao, Peiyun Zhuang, Qingkai Zeng, Jack J. Jiang, Xuge Huang, Ruiqing Wang, Jiazhen Le |
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| Rok vydání: | 2017 |
| Předmět: |
Larynx
Epiglottis Sound Spectrography Laryngectomy Articulatory phonetics 030507 speech-language pathology & audiology 03 medical and health sciences Speech and Hearing 0302 clinical medicine Dogs Phonation medicine Pressure Animals Mean flow 030223 otorhinolaryngology Sound pressure Mathematics Fundamental frequency Acoustics LPN and LVN Formant medicine.anatomical_structure Otorhinolaryngology Vocalization Animal 0305 other medical science Biomedical engineering |
| Zdroj: | Journal of voice : official journal of the Voice Foundation. 33(5) |
| ISSN: | 1873-4588 |
| Popis: | Summary Objectives The aim of this study is to explore the effects of the angle of epiglottis (Aepi) on phonation and resonance in excised canine larynges. Methods The anatomic Aepi was measured for 14 excised canine larynges as a control. Then, the Aepis were manually adjusted to 60° and 90° in each larynx. Aerodynamic and acoustic parameters, including mean flow rate, sound pressure level, jitter, shimmer, fundamental frequency (F0), and formants (F1′–F4′), were measured with a subglottal pressure of 1.5 kPa. Simple linear regression analysis between acoustic and aerodynamic parameters and the Aepi of the control was performed, and an analysis of variance comparing the acoustic and aerodynamic parameters of the three treatments was carried out. Results The results of the study are as follows: (1) the larynges with larger anatomic Aepi had significantly lower jitter, shimmer, formant 1, and formant 2; (2) phonation threshold flow was significantly different for the three treatments; and (3) mean flow rate and sound pressure level were significantly different between the 60° and the 90° treatments of the 14 larynges. Conclusions The Aepi was proposed for the first time in this study. The Aepi plays an important role in phonation and resonance of excised canine larynges. |
| Databáze: | OpenAIRE |
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