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Kim, Namkeun
Alternative names
Publications (3 of 3) Show all publications
Kim, N. K. & Stenfelt, S. (2015). A Possible Third Window for Bone Conducted Hearing: Cochlear Aqueduct vs. Vestibular Aqueduct. In: Mechanics of hearing: Protein to perception: . Paper presented at 12th International Workshop on the Mechanics of Hearing, Cape Sounio, Greece, 23–29 June 2014 (pp. 060016-1-060016-4). American Institute of Physics (AIP), 1703(060016)
Open this publication in new window or tab >>A Possible Third Window for Bone Conducted Hearing: Cochlear Aqueduct vs. Vestibular Aqueduct
2015 (English)In: Mechanics of hearing: Protein to perception, American Institute of Physics (AIP), 2015, Vol. 1703, no 060016, p. 060016-1-060016-4Conference paper, Published paper (Refereed)
Abstract [en]

A third window, which is another cochlear fluid pathway different from the oval window and round window, is considered to be a significant factor in bone-conducted hearing. A three-dimensional finite element model of the human ear consisting of the middle ear and cochlea was used to investigate the effect of the third windows on bone-conducted heraing. This study is aimed to find the third window which causes the consistent cochlear responses with previous studies in air-conducted hearing, and causes the asymmetry of the volume velocity ratio between the oval window and round window in bone-conducted hearing. The preliminary result shows that the cochlear aqueduct and the vestibular aqueduct with high impedance do not affect the basilar membrane velocity in air-conducted hearing. On the contrary, in bone-conducted hearing, the direction of the shaking structure for the bone-conducted stimulation as well as the third window can be a significant factor causing the asymmetry of the volume velocity ratio found by Stenfelt et al.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2015
Series
AIP Conference Proceedings, ISSN 0094-243X
National Category
Clinical Medicine
Identifiers
urn:nbn:se:liu:diva-127074 (URN)10.1063/1.4939371 (DOI)000372065400058 ()978-0-7354-1350-4 (ISBN)
Conference
12th International Workshop on the Mechanics of Hearing, Cape Sounio, Greece, 23–29 June 2014
Available from: 2016-04-13 Created: 2016-04-13 Last updated: 2016-04-28Bibliographically approved
Chang, Y., Kim, N. K. & Stenfelt, S. (2015). Simulation of Bone-Conducted Sound Transmission in a Three-Dimensional Finite-Element Model of a Human Skull. In: MECHANICS OF HEARING: PROTEIN TO PERCEPTION: . Paper presented at 12th International Workshop on the Mechanics of Hearing.23–29 June 2014 Cape Sounio, Greece. AMER INST PHYSICS, 1703(060014)
Open this publication in new window or tab >>Simulation of Bone-Conducted Sound Transmission in a Three-Dimensional Finite-Element Model of a Human Skull
2015 (English)In: MECHANICS OF HEARING: PROTEIN TO PERCEPTION, AMER INST PHYSICS , 2015, Vol. 1703, no 060014Conference paper, Published paper (Refereed)
Abstract [en]

Bone conduction (BC) is the transmission of sound to the inner ear through the bones of the skull. This type of transmission is used in humans fitted with BC hearing aids as well as to classify between conductive and sensorineural hearing losses. The objective of the present study is to develop a finite-element (FE) model of the human skull based on cryosectional images of a female cadaver head in order to gain better understanding of the sound transmission. Further, the BC behavior was validated in terms of sound transmission against experimental data published in the literature. Results showed the responses of the simulated skull FE model were consistent with the experimentally reported data.

Place, publisher, year, edition, pages
AMER INST PHYSICS, 2015
Series
AIP Conference Proceedings, ISSN 0094-243X
National Category
Otorhinolaryngology
Identifiers
urn:nbn:se:liu:diva-127071 (URN)10.1063/1.4939369 (DOI)000372065400056 ()978-0-7354-1350-4 (ISBN)
Conference
12th International Workshop on the Mechanics of Hearing.23–29 June 2014 Cape Sounio, Greece
Available from: 2016-04-13 Created: 2016-04-13 Last updated: 2016-04-28
Kim, N., Chang, Y. & Stenfelt, S. (2014). A Three-Dimensional Finite-Element Model of a Human Dry Skull for Bone-Conduction Hearing. BioMed Research International, 2014(519429)
Open this publication in new window or tab >>A Three-Dimensional Finite-Element Model of a Human Dry Skull for Bone-Conduction Hearing
2014 (English)In: BioMed Research International, ISSN 2314-6133, E-ISSN 2314-6141, Vol. 2014, no 519429Article in journal (Refereed) Published
Abstract [en]

A three-dimensional finite-element (FE) model of a human dry skull was devised for simulation of human bone-conduction (BC) hearing. Although a dry skull is a simplification of the real complex human skull, such model is valuable for understanding basic BC hearing processes. For validation of the model, the mechanical point impedance of the skull as well as the acceleration of the ipsilateral and contralateral cochlear bone was computed and compared to experimental results. Simulation results showed reasonable consistency between the mechanical point impedance and the experimental measurements when Youngs modulus for skull and polyurethane was set to be 7.3 GPa and 1 MPa with 0.01 and 0.1 loss factors at 1 kHz, respectively. Moreover, the acceleration in the medial-lateral direction showed the best correspondence with the published experimental data, whereas the acceleration in the inferior-superior direction showed the largest discrepancy. However, the results were reasonable considering that different geometries were used for the 3D FE skull and the skull used in the published experimental study. The dry skull model is a first step for understanding BC hearing mechanism in a human head and simulation results can be used to predict vibration pattern of the bone surrounding the middle and inner ear during BC stimulation.

Place, publisher, year, edition, pages
Hindawi Publishing Corporation, 2014
National Category
Clinical Medicine
Identifiers
urn:nbn:se:liu:diva-112658 (URN)10.1155/2014/519429 (DOI)000344143300001 ()25243148 (PubMedID)
Note

Funding Agencies|European Union [600933]

Available from: 2014-12-05 Created: 2014-12-05 Last updated: 2018-04-09
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