Electromagnetic-Mechanical Analysis of a Balanced Armature Receiver by Considering the Nonlinear Parameters as a Function of Displacement and Current

Jiang, Yuan-Wu; Xu, Dan-Ping; Hwang, Sang-Moon

doi:10.1109/tmag.2018.2851242

Cited by 11 publications

(8 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These speakers have higher energy efficiency, good acoustic performance, and a small device size. However, these speakers are high cost, need a complicated process in fabrication [6]- [8]. The widely used piezoelectric materials include lead zirconate titanate (PZT) or organic polymers such as polyvinylidene fluoride (PVDF) due to their excellent piezoelectric coefficient and relative mature manufacture processes.…”

Section: Introductionmentioning

confidence: 99%

Membraneless Piezoelectric MEMS speakers based on AlN Thin Film

Fawzy

2022

JES. Journal of Engineering Sciences

View full text Add to dashboard Cite

This paper reports piezoelectric aluminium nitride (AlN) based microelectromechanical systems (MEMS) speakers. We introduce a novel geometry of micro speakers based on AlN to meet the requirements of modern applications such as phones, tablets, laptops, and in-ear applications. We introduce the principle, design, and characterization results. The speakers were fabricated on cavity silicon on insulator (SOI) substrate and characterized by using an electroacoustic tester. This paper considers the acoustic performance of the speakers. The results show that the speakers gave us a high sound pressure level (SPL) of more than 78 dB for circle geometry when applying 2 volts on the electrodes. These results are equal for PZT MEMS speakers moreover AlN opens the door to integrate the speakers and the ASIC on the same chip. The size of the different geometries' speakers isn't exceeded 3mm × 3mm. These geometries offer a breakthrough in acoustic performance, a frequency response, and low power consumption

show abstract

Section: Introductionmentioning

confidence: 99%

Membraneless Piezoelectric MEMS speakers based on AlN Thin Film

Fawzy

2022

JES. Journal of Engineering Sciences

View full text Add to dashboard Cite

show abstract

“…With the rapid development of consumer products such as mobile phones, notebook computers, and MP4 players, audio transducers have been recognized as multifunctional assets with which to increase the convenience of multimedia products. According to the working-principle difference, there are electrostatic [1,2], balanced armature [3,4] piezoelectric [5][6][7], and moving coil speakers. A speaker enclosure is used to separate the sound from the front and back to avoid sound cancelation by speakers.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Application of Screens for Acoustic Impedance in a Speaker Box with a Passive Radiator to Decrease Standing-Wave Influence

Jiang

et al. 2020

Applied Sciences

Self Cite

View full text Add to dashboard Cite

Micro speakers are playing an increasingly important role with the development of multimedia devices. This study applies the lumped-parameter method, which uses an equivalent circuit to model the electromagnetic and mechanical domains. The acoustic domain is modeled using the finite element method. Based on the analysis tool, the use of a screen is analyzed, and the screen is designed to depress the acoustic resonance in the sound-pressure-level curve and improve the performance. The samples are fabricated, and the experiment verifies the analysis method. The experimental result shows that the peak and dip due to the standing wave are cancelled, and the frequency response is smooth when the screen is used.

show abstract

“…In terms of acoustic transducers, there are the MEMS receiver [1,2], the dynamic receiver [3], the speaker box with passive radiator [4], and the balanced armature receiver [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. The Balance armature structure was devized by Olsen [5].…”

Section: Introductionmentioning

confidence: 99%

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

Jiang

et al. 2019

Applied Sciences

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Electromagnetic-Mechanical Analysis of a Balanced Armature Receiver by Considering the Nonlinear Parameters as a Function of Displacement and Current

Cited by 11 publications

References 7 publications

Membraneless Piezoelectric MEMS speakers based on AlN Thin Film

Membraneless Piezoelectric MEMS speakers based on AlN Thin Film

Analysis and Application of Screens for Acoustic Impedance in a Speaker Box with a Passive Radiator to Decrease Standing-Wave Influence

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

Contact Info

Product

Resources

About