Pressure-flow relationships in two models of the larynx having rectangular glottal shapes

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Abstract
The pressure-flow equations used in computer simulation studies of phonation lack experimental validation. Two polyester resin models of the laryngeal airway with rectangular glottal ducts were constructed in order to obtain the relationships between translaryngeal pressure drop and volume flow through the airway. The results are in disagreement with the early estimates of Wegel but match the predictions given by Ishizaka Matsudaira to within .apprx. .+-. 10% for typical translaryngeal pressures for speech, with larger discrepancies being found for the model with the larger glottal diameter. The equation given by van den Berg et al., may not be properly compared because their supraglottal pressure hole location may be different from that used in the present study. The data from the 2 models were compared to recent empirical studies using an enlarged model of the larynx.

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