Sound-Induced Round Window Vibration—Experiment and Numerical Simulations of Energy Transfer Through the Cochlea of the Human Ear
This study investigates the dynamic properties of the human middle ear and the energy transfer phenomena between the stapes footplate (SF) and the round window membrane (RWM) under sound stimulation. A series of laboratory tests were conducted, and a numerical model of the system was prepared. Durin...
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2024-12-01
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| author | Robert Zablotni Sylwester Tudruj Jaroslaw Latalski Marcin Szymanski Andrzej Kucharski Grzegorz Zając Rafał Rusinek |
| author_facet | Robert Zablotni Sylwester Tudruj Jaroslaw Latalski Marcin Szymanski Andrzej Kucharski Grzegorz Zając Rafał Rusinek |
| author_sort | Robert Zablotni |
| collection | DOAJ |
| description | This study investigates the dynamic properties of the human middle ear and the energy transfer phenomena between the stapes footplate (SF) and the round window membrane (RWM) under sound stimulation. A series of laboratory tests were conducted, and a numerical model of the system was prepared. During the experiments, vibrations in human temporal bones were recorded using a Laser Doppler Vibrometer (LDV), and the frequency response functions (FRFs) of the RWM and SF footplate were computed. Key resonances were identified, with notable differences in vibration amplitude depending on whether the artificial external ear canal was left open or closed. To evaluate the amplification of acoustic waves within the cochlea, the authors proposed a novel index defined as the ratio of the FRF of the RWM and SF, respectively. The performed computations showed that signal amplification is particularly noticeable in the frequency range from 1 to 2 kHz. Subsequently, a simplified computational fluid dynamics (CFD) model of the cochlea was developed to simulate internal pressure distribution within the scala vestibuli (SV) and scala tympani (ST) spaces. The numerical computations of acoustic signal amplification showed good agreement with the experimental data, particularly at the frequencies of 1 and 2 kHz. These findings provide new insights into cochlear acoustics and offer a potential tool for evaluating pathological disorders and designing prosthetic devices. |
| format | Article |
| id | doaj-art-4e08d0b7abb54adf92f7ab12095c8e18 |
| institution | Kabale University |
| issn | 2076-3417 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj-art-4e08d0b7abb54adf92f7ab12095c8e182025-01-10T13:15:05ZengMDPI AGApplied Sciences2076-34172024-12-0115130110.3390/app15010301Sound-Induced Round Window Vibration—Experiment and Numerical Simulations of Energy Transfer Through the Cochlea of the Human EarRobert Zablotni0Sylwester Tudruj1Jaroslaw Latalski2Marcin Szymanski3Andrzej Kucharski4Grzegorz Zając5Rafał Rusinek6Department of Applied Mechanics, Mechanical Engineering Faculty, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, PolandDepartment of Applied Mechanics, Mechanical Engineering Faculty, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, PolandDepartment of Applied Mechanics, Mechanical Engineering Faculty, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, PolandDepartment of Otolaryngology Head and Neck Surgery, Medical University of Lublin, Jaczewskiego 8, 20-090 Lublin, PolandDepartment of Otolaryngology Head and Neck Surgery, Medical University of Lublin, Jaczewskiego 8, 20-090 Lublin, PolandDepartment of Power Engineering and Transportation, Faculty of Production Engineering, University of Life Sciences in Lublin, Gleboka 28, 20-612 Lublin, PolandDepartment of Applied Mechanics, Mechanical Engineering Faculty, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, PolandThis study investigates the dynamic properties of the human middle ear and the energy transfer phenomena between the stapes footplate (SF) and the round window membrane (RWM) under sound stimulation. A series of laboratory tests were conducted, and a numerical model of the system was prepared. During the experiments, vibrations in human temporal bones were recorded using a Laser Doppler Vibrometer (LDV), and the frequency response functions (FRFs) of the RWM and SF footplate were computed. Key resonances were identified, with notable differences in vibration amplitude depending on whether the artificial external ear canal was left open or closed. To evaluate the amplification of acoustic waves within the cochlea, the authors proposed a novel index defined as the ratio of the FRF of the RWM and SF, respectively. The performed computations showed that signal amplification is particularly noticeable in the frequency range from 1 to 2 kHz. Subsequently, a simplified computational fluid dynamics (CFD) model of the cochlea was developed to simulate internal pressure distribution within the scala vestibuli (SV) and scala tympani (ST) spaces. The numerical computations of acoustic signal amplification showed good agreement with the experimental data, particularly at the frequencies of 1 and 2 kHz. These findings provide new insights into cochlear acoustics and offer a potential tool for evaluating pathological disorders and designing prosthetic devices.https://www.mdpi.com/2076-3417/15/1/301human inner earround window vibrationcochleaenergy transfer phenomenon |
| spellingShingle | Robert Zablotni Sylwester Tudruj Jaroslaw Latalski Marcin Szymanski Andrzej Kucharski Grzegorz Zając Rafał Rusinek Sound-Induced Round Window Vibration—Experiment and Numerical Simulations of Energy Transfer Through the Cochlea of the Human Ear Applied Sciences human inner ear round window vibration cochlea energy transfer phenomenon |
| title | Sound-Induced Round Window Vibration—Experiment and Numerical Simulations of Energy Transfer Through the Cochlea of the Human Ear |
| title_full | Sound-Induced Round Window Vibration—Experiment and Numerical Simulations of Energy Transfer Through the Cochlea of the Human Ear |
| title_fullStr | Sound-Induced Round Window Vibration—Experiment and Numerical Simulations of Energy Transfer Through the Cochlea of the Human Ear |
| title_full_unstemmed | Sound-Induced Round Window Vibration—Experiment and Numerical Simulations of Energy Transfer Through the Cochlea of the Human Ear |
| title_short | Sound-Induced Round Window Vibration—Experiment and Numerical Simulations of Energy Transfer Through the Cochlea of the Human Ear |
| title_sort | sound induced round window vibration experiment and numerical simulations of energy transfer through the cochlea of the human ear |
| topic | human inner ear round window vibration cochlea energy transfer phenomenon |
| url | https://www.mdpi.com/2076-3417/15/1/301 |
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