Comparison of Multi-Physical Coupling Analysis of a Balanced Armature Receiver between the Lumped Parameter Method and the Finite Element/Boundary Element Method

The balanced armature receiver (BAR) is a product based on multiphysics that enables coupling between the electromagnetic, mechanical, and acoustic domains. The three domains were modeled using the lumped parameter method (LPM) that takes advantage of an equivalent circuit. In addition, the combined...

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Bibliographic Details
Published in:Applied sciences 2019, Vol.9 (5), p.839
Main Authors: Jiang, Yuan-Wu, Xu, Dan-Ping, Jiang, Zhi-Xiong, Kim, Jun-Hyung, Hwang, Sang-Moon
Format: Article
Language:English
Subjects:
Acoustics
balanced armature receiver
Boundary element method
Computer simulation
Domains
Equivalent circuits
Experiments
Finite element method
finite element method and Boundary element method
Hearing aids
lumped parameter method
Material properties
Mechanical properties
Parameter identification
Sound pressure
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Summary:The balanced armature receiver (BAR) is a product based on multiphysics that enables coupling between the electromagnetic, mechanical, and acoustic domains. The three domains were modeled using the lumped parameter method (LPM) that takes advantage of an equivalent circuit. In addition, the combined finite element method (FEM) and boundary element method (BEM) was also applied to analyze the BAR. Both simulation results were verified against experimental results. The proposed LPM can predict the sound pressure level (SPL) by making use of the BAR parts dimension and material property. In addition, the previous analysis method, FEM/BEM, took 36 h, while the proposed LPM takes 1 h. So the proposed LPM can be used to check the BAR parts’ dimension and material property influence on the SPL and develop the BAR product efficiently.
ISSN:2076-3417
2076-3417
DOI:10.3390/app9050839