Use of magnetic resonance image registration to estimate displacement in the human earcanal due to the insertion of in-ear devices

Type de document

Études primaires

Année de publication

2019

Langue

Anglais

Titre de la revue

Journal of the Acoustical Society of America

Première page

2452

Dernière page

2465

Résumé

In-ear devices are used in a wide range of applications for which the device's usability and/or efficiency is strongly related to comfort aspects that are influenced by the mechanical interaction between the device and the walls of the earcanal. Although the displacement of the earcanal walls due to the insertion of the device is an important characteristic of this interaction, existing studies on this subject are very limited. This paper proposes a method to estimate this displacement in vivo using a registration technique on magnetic resonance images. The amplitude, the location and the direction of the earcanal wall displacement are computed for four types of earplugs used by one participant. These displacements give indications on how each earplug deforms the earcanal for one specific earcanal geometry and one specific earplug insertion. Although the displacement due to a specific earplug family cannot be generalized using the results of this paper, the latter help to understand where, how much, and how each studied earplug deforms the earcanal of the participant. This method is revealed as a promising tool to investigate further acoustical and physical comfort aspects of in-ear devices.

Mots-clés

Imagerie par résonance magnétique, Magnetic resonance imaging, Oreille, Ear, Protège-tympan, Earplug, Essai du matériel, Equipment testing, Évaluation du confort, Comfort assessment

Numéro de projet IRSST

2016-0020

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