|Title:||Development of mathematical models for the hearing mechanism|
|Subject:||Hearing -- Mathematical models|
Hong Kong Polytechnic University -- Dissertations
Jockey Club Rehabilitation Engineering Centre
|Pages:||v, 59 leaves : ill. ; 30 cm|
|Abstract:||A review on the mathematical models used for the hearing mechanism was made. The lumped parameter model was selected for testing out the frequency response characteristics of the middle ear. A sound pressure wave was applied to the eardrum. The gain offered by the system was found to vary significantly with the area ratio between the eardrum and the oval window, but less sensitive to structural components in intact in the human audible frequency range. An attempt has been made to simulate a simple insert as a middle ear prosthesis which is found to perform like an ideal transformer matching the impedance loss excellently. Fine tuning of the material stiffness or contact means with the eardrum may help in adjusting the necessary gain. Further works are recommended in the areas of finite element modelling to take into account assumptions on the middle ear bones as rigid bodies and the compliance of the ear cavity.|
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