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Original Article

Impedance and admittance tympanometry: I. Experimental Approach

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Pages 97-107 | Published online: 07 Jul 2009
 

Abstract

In this experimental study a procedure is developed which enables the conversion of susceptance and conductance tympanograms to reactance and resistance tympanograms. Special attention was given to the subtraction of the ear canal admittance. The procedure was applied to bell-shaped and W-notched susceptance and conductance tympanograms. Computed reactance curves showed always an inverted-V shape, computed resistance curves were always flat.

Résumé

L'étude expérimentale présentée ici a permis de développer une méthode de conversion des tympanogrammes de susceptance et de conductance en tympanogrammes de résistance et de réactance. La soustraction de l'admittance du conduit auditif a fait l'objet d'une attention toute particulière.

La méthode a été appliquée aussi bien à la conversion de tympanogrammes en forme de cloche qu'à celle de tympanogrammes en W. Les courbes de réactance présentaient toujours une forme en V inversé tandis que les courbes de résistance n'offraient aucun relief accentué.

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