Mechanism of bone-conducted hearing : mathematical approach
For better understanding of bone-conducted (BC) hearing, a mechanical BC model is formulated using the Wentzel-Kramers-Brillouin (WKB) method. The BC hearing can be generally described by three main mechanisms: (1) cochlear fluid inertia, (2) in-phase motion of the outer bony shell, and (3) out-of-p...
| Main Authors: | , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/139424 |
| _version_ | 1826125318717440000 |
|---|---|
| author | Chan, Wei Xuan Yoon, Yong-Jin Kim, Namkeun |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Chan, Wei Xuan Yoon, Yong-Jin Kim, Namkeun |
| author_sort | Chan, Wei Xuan |
| collection | NTU |
| description | For better understanding of bone-conducted (BC) hearing, a mechanical BC model is formulated using the Wentzel-Kramers-Brillouin (WKB) method. The BC hearing can be generally described by three main mechanisms: (1) cochlear fluid inertia, (2) in-phase motion of the outer bony shell, and (3) out-of-phase motion of the outer bony shell. Specifically, the second and third mechanisms can be identically explained by symmetric pressure compression-expansion and anti-symmetric compression-expansion, respectively. In this study, simulation results show that both the symmetric and anti-symmetric compression-expansion modes become significant at frequencies above 7 kHz while the fluid inertial mode is dominant at lower frequencies. The density difference between the scala fluid and soft cells of basilar membrane and the amplitude of the anti-symmetric compression-expansion input are identified as the difference between the air conduction and bone conduction. The natural frequency of the cochlear duct wall determines the magnitudes between the three mechanism and is approximated to be in the order of 10 MHz and above. |
| first_indexed | 2024-10-01T06:34:41Z |
| format | Journal Article |
| id | ntu-10356/139424 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:34:41Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1394242020-05-19T07:34:11Z Mechanism of bone-conducted hearing : mathematical approach Chan, Wei Xuan Yoon, Yong-Jin Kim, Namkeun School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Bone Conduction Human For better understanding of bone-conducted (BC) hearing, a mechanical BC model is formulated using the Wentzel-Kramers-Brillouin (WKB) method. The BC hearing can be generally described by three main mechanisms: (1) cochlear fluid inertia, (2) in-phase motion of the outer bony shell, and (3) out-of-phase motion of the outer bony shell. Specifically, the second and third mechanisms can be identically explained by symmetric pressure compression-expansion and anti-symmetric compression-expansion, respectively. In this study, simulation results show that both the symmetric and anti-symmetric compression-expansion modes become significant at frequencies above 7 kHz while the fluid inertial mode is dominant at lower frequencies. The density difference between the scala fluid and soft cells of basilar membrane and the amplitude of the anti-symmetric compression-expansion input are identified as the difference between the air conduction and bone conduction. The natural frequency of the cochlear duct wall determines the magnitudes between the three mechanism and is approximated to be in the order of 10 MHz and above. 2020-05-19T07:34:11Z 2020-05-19T07:34:11Z 2018 Journal Article Chan, W. X., Yoon, Y.-J., & Kim, N. (2018). Mechanism of bone-conducted hearing : mathematical approach. Biomechanics and Modeling in Mechanobiology, 17(6), 1731-1740. doi:10.1007/s10237-018-1052-5 1617-7959 https://hdl.handle.net/10356/139424 10.1007/s10237-018-1052-5 30051339 2-s2.0-85050758464 6 17 1731 1740 en Biomechanics and Modeling in Mechanobiology © 2018 Springer-Verlag GmbH Germany, part of Springer Nature. All rights reserved. |
| spellingShingle | Engineering::Mechanical engineering Bone Conduction Human Chan, Wei Xuan Yoon, Yong-Jin Kim, Namkeun Mechanism of bone-conducted hearing : mathematical approach |
| title | Mechanism of bone-conducted hearing : mathematical approach |
| title_full | Mechanism of bone-conducted hearing : mathematical approach |
| title_fullStr | Mechanism of bone-conducted hearing : mathematical approach |
| title_full_unstemmed | Mechanism of bone-conducted hearing : mathematical approach |
| title_short | Mechanism of bone-conducted hearing : mathematical approach |
| title_sort | mechanism of bone conducted hearing mathematical approach |
| topic | Engineering::Mechanical engineering Bone Conduction Human |
| url | https://hdl.handle.net/10356/139424 |
| work_keys_str_mv | AT chanweixuan mechanismofboneconductedhearingmathematicalapproach AT yoonyongjin mechanismofboneconductedhearingmathematicalapproach AT kimnamkeun mechanismofboneconductedhearingmathematicalapproach |