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  • Title: The effect of air flow and medial adductory compression on vocal efficiency and glottal vibration.
    Author: Berke GS, Hanson DG, Gerratt BR, Trapp TK, Macagba C, Natividad M.
    Journal: Otolaryngol Head Neck Surg; 1990 Mar; 102(3):212-8. PubMed ID: 2108407.
    Abstract:
    This study used an in vivo canine model to investigate the effects of varying vocal fold resistance by electrically stimulating the recurrent laryngeal nerve while monitoring medial adductory compression of the vocal folds, glottal airflow, and vocal intensity. The effects of increasing airflow on glottal vibration were also examined stroboscopically and by measurement of open quotient. The results indicated that increasing intensity by medial adductory compression was more efficient than by increasing airflow. Increasing airflow produced a significantly greater open quotient and vocal fold vibratory excursion.
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