Effect of Air Flow Change on Voice Parameters : In Vivo Canine Laryngeal Model

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J Korean Soc Laryngol Phoniatr Logop > Volume 5(1); 1994 > Article

Journal of The Korean Society of Laryngology, Phoniatrics and Logopedics 1994;5(1): 5-10.

생체 발성모형에서 발성시 공기양의 변화가 음성 지표에 미치는 영향

최홍식

연세대학교 의과대학 음성언어의학연구소, 이비인후과학교실

Effect of Air Flow Change on Voice Parameters : In Vivo Canine Laryngeal Model

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ABSTRACT

In vivo canine model was made in two mongrel dogs under the general Ⅰ-Ⅴ anesthesia. A vertical skin incision was made on the neck, the larynx and the trachea were dissected. Two tracheal openings were made : lower one for the insertion of the anesthesia tube and upper one for the delivery of air to the larynx to induce phonation. External branch of the superior laryngeal nerves and recurrent laryngeal nerves bilaterally were identified and stimulated electrically constantly. Subglottic pressure. fundamental frequency, intensity, and open quotient were measured when the air flow rate was varying low, medium and high. Glottic resistence was calculated. As the air flow rate was increased, the subglottic pressure and the sound intensity were increased. However, glottic resistance was decreased as the air flow was increased. In falsetto register, fundamenatal frequency was increased with the increment of air flow, but in modal register fundamental frequency was not increased statistically significant Open quotient by the electroglottography was increased according to the increment of airflow.

KEY WORDS： In vivo laryngeal model;Airflow;Voice parameters;