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

Abstract

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.

Special Issue on Modelling, Simulation and Data Analysis in Acoustical Problems

“…Yin et al [21] and Jiang et al [22] present their results on transducers, respectively on a 3D model of electromagnetic acoustic transducers and balanced armature receiver optimal design.…”

Mathematical Modelling and Simulation Analysis of an Aircraft Wing Using SimMechanics

“…According to Hatch [13], A literature study which aims to practical the different methods of constructing, representing dynamic mechanical models and develop a strong understanding of modal analysis, where the total response of a system can be constructed by combinations of the individual modes of vibration. The lumped parameter method has been proved efficient in a wide range of domains such as acoustics and mechanics [14]. In the work developed by Svoboda and Hromčík [15], the finite element based structural model of a flexible wing is presented, in which the problem is addressed using Euler-Bernoulli.…”

Analysis and Design of a Novel Concept Gasket to Improve the Reliability of the Balanced Armature Receiver Used in Earphones

“…On account of these advantages, BA receivers have been extensively employed in stethoscopes, hearing aids, earphones, and smartwatches. Therefore, several kinds of research have been done involving analyses of the electromagnetic and acoustic characteristics of BA receivers using the lumped parameter method [6] to set up the equivalent circuit, and finite element method [7] to divide the BA receiver into finite elements. However, no research exists regarding the reliability of BA receiver application.…”