Analysis of Sound Pressure Level of a Balanced Armature Receiver Considering Coupling Effects

Xu, Dan-Ping; Lu, Han-Wen; Jiang, Yuan-Wu; Kim, Hyung-Kyu; Kwon, Jun-Young; Hwang, Sang-Moon

doi:10.1109/access.2017.2696565

Cited by 16 publications

(9 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the dynamic receiver, the force factor is defined as the product of flux density and coil length. For the BA receiver, the force factor is defined as the current force divided by the current [4]. To solve the resistance and inductance, the transient electromagnetic FEM is used.…”

Section: Mechanical Analysismentioning

confidence: 99%

“…Nowadays, earphones are inseparable companions of multimedia devices such as mobile phones, notebook computers, video recorders, dictation devices, personal digital assistants, MP4 players, and personal music systems. The acoustic transducers generally used in these earphones include microelectromechanical system (MEMS) receivers [1,2], dynamic receivers [3], and balanced-armature (BA) receivers [4,5]. In this work, the BA receiver and dynamic receiver were combined in a hybrid earphone to improve the sound pressure level (SPL) over a wide range.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis and Development of Hybrid Earphone Combining Balanced-Armature and Dynamic Receivers

Jiang

et al. 2019

Applied Sciences

Self Cite

View full text Add to dashboard Cite

With the rapid progress in the development of multimedia devices, earphones have become increasingly important as audio output tools. Hybrid earphones combining balanced-armature (BA) and dynamic receivers can produce better performance over a wider range when compared to the earphones with BA receiver alone (BA earphones) or dynamic receiver alone (dynamic earphones). BA and dynamic earphones are multi-physics products that exhibit coupling between the electromagnetic, mechanical, and acoustic domains. In this study, an analysis tool is developed to design a hybrid earphone based on the conventional BA and dynamic earphones. Using the developed analysis tool, an acoustic tube is optimized to match the earphone target curve and obtain improved sound quality. A prototype is manufactured and tested, and the experimental results verify the feasibility and effectiveness of the developed analysis tool. The root-mean-square value of the sound pressure level (SPL) deviation of the hybrid earphone with the optimized acoustic tube is 4.60, whereas those for the dynamic and BA earphones are 8.94 and 6.04, respectively. Thus, it is verified that the frequency response is improved using the hybrid earphone developed herein.

show abstract

Section: Mechanical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis and Development of Hybrid Earphone Combining Balanced-Armature and Dynamic Receivers

Jiang

et al. 2019

Applied Sciences

Self Cite

View full text Add to dashboard Cite

show abstract

“…The measured coupling-coefficient value shown in Table 3 confirms that the proposed and designed SCTR satisfies the high coupling-coefficient requirement. Calculation of parameters for MEC of SCTR using FEM: A TR can be expressed by a MEC composed of two or more electrical circuits and a magnetically coupled magnetic circuit [39][40][41][42][43]. The MEC of an SCTR can be expressed as in Fig.…”

Section: Design Of Sctr Using Femmentioning

confidence: 99%

Characteristic analysis and design of novel high‐frequency shell‐type coaxial transformer

Lee¹,

Kim

Park

et al. 2019

IET Electric Power Applications

View full text Add to dashboard Cite

Recently, power conversion systems (PCSs) have exhibited high efficiencies and miniaturisation, and this trend is expected to grow in the future. An important component of the PCS, which accounts for a significant portion of its volume, is the transformer (TR). However, it is difficult to achieve a significant increase in the efficiency and reduction in the volume of a PCS using a conventional TR, as the conventional TRs do not offer much scope for further optimisation. To overcome this limitation imposed by the conventional TRs, a novel and practical high-frequency coaxial TR, named the shell-type coaxial TR (SCTR), is proposed in this work. A useful and strategic analysis and design method, which covers the overall development process from the design stage to the experimental validation stage of the proposed high-frequency SCTR, is also proposed. The usefulness of the proposed SCTR and the analysis and design method are verified by designing an SCTR for a 50 W DC/DC converter and conducting experiments on it. It is found that the use of the proposed technique can cause a significant increase in the efficiency and power density of the PCS

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

Analysis of Sound Pressure Level of a Balanced Armature Receiver Considering Coupling Effects

Cited by 16 publications

References 9 publications

Analysis and Development of Hybrid Earphone Combining Balanced-Armature and Dynamic Receivers

Analysis and Development of Hybrid Earphone Combining Balanced-Armature and Dynamic Receivers

Characteristic analysis and design of novel high‐frequency shell‐type coaxial transformer

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