Detail publikace
Influence of middle ear cavity wall absorption on mechanics of hearing
DUŠEK, D. PELLANT, K.
Český název
Influence of middle ear cavity wall absorption on mechanics of hearing
Anglický název
Influence of middle ear cavity wall absorption on mechanics of hearing
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
cs
Originální abstrakt
Impedance and wall absorption are important characteristics of acoustical systems. Unlike the electrical case, no convenient commercial system is available for acoustical impedance measurement. Reasons for this lack include the unavailability of low distortion acoustic sources, the unavailability of precisely calibrated acoustic sources, and the complications introduced by the wave-like nature of sound (due to the relatively slow sound speed). Therefore it is an absence of serious experimental data of eardrum acoustic impedance or ear cavity wall impedance. In this paper we shall discuss an application of mathematical modelling for the determination of an interval of possible impedance values. The modelling used here is based on final element method (system Ansys 7.1), the complete mechanical model of human ear. From the point of view of acoustic energy transmission are taken in account the acoustic subsystem of the external auditory canal, the elastic structure of the tympanic membrane, the middle ear cavity acoustic subsystem, the stiff ear ossicle chain with moveable joints, the coupling of individual ossicles to the walls of middle ear cavity via ligaments and muscles and the coupling of stapes footplate to oval window (the enter of cochlea).
Český abstrakt
Impedance and wall absorption are important characteristics of acoustical systems. Unlike the electrical case, no convenient commercial system is available for acoustical impedance measurement. Reasons for this lack include the unavailability of low distortion acoustic sources, the unavailability of precisely calibrated acoustic sources, and the complications introduced by the wave-like nature of sound (due to the relatively slow sound speed). Therefore it is an absence of serious experimental data of eardrum acoustic impedance or ear cavity wall impedance. In this paper we shall discuss an application of mathematical modelling for the determination of an interval of possible impedance values. The modelling used here is based on final element method (system Ansys 7.1), the complete mechanical model of human ear. From the point of view of acoustic energy transmission are taken in account the acoustic subsystem of the external auditory canal, the elastic structure of the tympanic membrane, the middle ear cavity acoustic subsystem, the stiff ear ossicle chain with moveable joints, the coupling of individual ossicles to the walls of middle ear cavity via ligaments and muscles and the coupling of stapes footplate to oval window (the enter of cochlea).
Anglický abstrakt
Impedance and wall absorption are important characteristics of acoustical systems. Unlike the electrical case, no convenient commercial system is available for acoustical impedance measurement. Reasons for this lack include the unavailability of low distortion acoustic sources, the unavailability of precisely calibrated acoustic sources, and the complications introduced by the wave-like nature of sound (due to the relatively slow sound speed). Therefore it is an absence of serious experimental data of eardrum acoustic impedance or ear cavity wall impedance. In this paper we shall discuss an application of mathematical modelling for the determination of an interval of possible impedance values. The modelling used here is based on final element method (system Ansys 7.1), the complete mechanical model of human ear. From the point of view of acoustic energy transmission are taken in account the acoustic subsystem of the external auditory canal, the elastic structure of the tympanic membrane, the middle ear cavity acoustic subsystem, the stiff ear ossicle chain with moveable joints, the coupling of individual ossicles to the walls of middle ear cavity via ligaments and muscles and the coupling of stapes footplate to oval window (the enter of cochlea).
Klíčová slova anglicky
FEM, muman ear, harmonic analysis
Rok RIV
2005
Vydáno
09.05.2005
Nakladatel
Institute of thermomechanics, AS CR
Místo
Praha
ISBN
80-85918-93-5
Kniha
Book of extended abstracts
Počet stran
2
BIBTEX
@inproceedings{BUT18388,
author="Daniel {Dušek} and Karel {Pellant},
title="Influence of middle ear cavity wall absorption on mechanics of hearing",
booktitle="Book of extended abstracts",
year="2005",
month="May",
publisher="Institute of thermomechanics, AS CR",
address="Praha",
isbn="80-85918-93-5"
}