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Laryngeal modeling: Theoretical, in vitro, in vivo
Author(s) -
Berke Gerald S.,
Moore Dennis M.,
Hanson David G.,
Hantke David R.,
Gerratt Bruce R.,
Burstein Fernando
Publication year - 1987
Publication title -
the laryngoscope
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 148
eISSN - 1531-4995
pISSN - 0023-852X
DOI - 10.1288/00005537-198707000-00019
Subject(s) - phonation , larynx , in vivo , electroglottograph , articulatory phonetics , vocal folds , anatomy , vibration , waveform , stroboscope , acoustics , biomedical engineering , medicine , biology , physics , audiology , quantum mechanics , voltage , microbiology and biotechnology , optics
Abstract Because the larynx is situated anatomically in an area which is difficult to measure and visualize, theoretical, in vitro, and in vivo models are used in laryngeal research. Vocal fold vibration was studied in anesthetized dogs, while electrically stimulating independently the superior and recurrent laryngeal nerves under conditions of constant airflow. Photoglottographic (PGG), electroglottographic (EGG), and subglottic pressure signals were obtained while stroboscopically photographing the larynx. Specific points along PGG, EGG, and subglottic pressure waveforms were correlated with laryngeal events which occurred during vibration. The canine larynx, in an experimentally produced phonatory mode, vibrates in a two mass (upper and lower margin) system and appears comparable to modal human voice production. The recorded glottogrophic waveforms from experimentally produced phonation in the canine are similar to signals recorded from humans. However, observed differences can be related to anatomic differences.