Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-28T00:05:57.795Z Has data issue: false hasContentIssue false
  • English
  • Français

Acoustical Analysis of Enclosure Design Parameters for Microspeaker System

Published online by Cambridge University Press:  04 September 2017

J. R. Chang  and
C. N. Wang
J. R. Chang*
Affiliation:
Department of Engineering Science and Ocean EngineeringNational Taiwan UniversityTaipei, Taiwan
C. N. Wang
Affiliation:
Department of Engineering Science and Ocean EngineeringNational Taiwan UniversityTaipei, Taiwan
*
*Corresponding author ([email protected])
Get access

Abstract

Microspeakers are key components of mobile devices in current consumer products; moreover, the user experience of multimedia products plays an essential role. The objective of this study was to investigate the acoustic performance of microspeakers in different enclosure parameters for mobile devices. Two methodologies are performed. The first model is an electro-mechano-acoustical model (EMA) of microspeaker along with distribution model of enclosure effect; the 2nd model, the details of diaphragms are taken into account in calculating the distribution models of microspeaker with enclosure parameters. They were combined and applied to determine microspeaker performance levels for mobile devices. Two methodologies show acceptable agreement with experimental results. The distribution model can well simulate the high frequency response than lumped model of microspeaker. The results can predict microspeaker system performance before industrial design and mechanism placement processes are executed.

Keywords

EMAMicrospeakerEnclosure parametersDistribution model
Type
Research Article
Information
Journal of Mechanics , Volume 35 , Issue 1 , February 2019 , pp. 1 - 12
Copyright
Copyright © The Society of Theoretical and Applied Mechanics 2019 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Siemens, E. W., “Improvement in Magneto-Electric Apparatus,” U.S. Patent No. 149,797 (1874).Google Scholar
2. Siemens, E. W., “Electromechanical ‘Dynamic’ or Moving-Coil Transducer,” German Patent No. 2355 (1877).Google Scholar
3. Rice, C. W. and Kellogg, E. W., “Notes on the Development of a New Type of Hornless Loudspeaker,” Journal of the Audio Engineering Society, 30, pp. 512–521 (1982).Google Scholar
4. Villchur, E. M., “Problems of Bass Reproduction in Loudspeakers,” Journal of the Audio Engineering Society, 5, pp. 122–126 (1957).Google Scholar
5. Villchur, E. M., “A Method of Testing Loudspeakers with Random Noise Input,” Journal of the Audio Engineering Society, 10, pp. 306–309 (1962).Google Scholar
6. Thiele, A. N., “Loudspeakers in Vented Boxes: Part 1,” Journal of the Audio Engineering Society, 19, pp. 382–392 (1971).Google Scholar
7. Thiele, A. N., “Loudspeakers in Vented Boxes: Part 2,” Journal of the Audio Engineering Society, 19, pp. 471–483 (1971).Google Scholar
8. Small, R., “Direct Radiator Loudspeaker System Analysis,” Journal of the Audio Engineering Society, 20, pp. 383–395 (1972).Google Scholar
9. Small, R., “Closed-Box Loudspeaker Systems-Part 1: Analysis,” Journal of the Audio Engineering Society, 20, pp. 798–808 (1972).Google Scholar
10. Small, R., “Closed-Box Loudspeaker Systems-Part 2: Synthesis,” Journal of the Audio Engineering Society, 21, pp. 11–18 (1973).Google Scholar
11. Small, R., “Vented-Box Loudspeaker Systems-Part 1: Small-Signal Analysis,” Journal of the Audio Engineering Society, 21, pp. 363–372 (1973).Google Scholar
12. Small, R., “Vented-Box Loudspeaker Systems-Part 2: Large-Signal Analysis,” Journal of the Audio Engineering Society, 21, pp. 438–444 (1973).Google Scholar
13. Small, R., “Vented-Box Loudspeaker Systems-Part 3: Synthesis,” Journal of the Audio Engineering Society, 21, pp. 549–554 (1973).Google Scholar
14. Small, R., “Vented-Box Loudspeaker Systems-Part 4: Appendices,” Journal of the Audio Engineering Society, 21, pp. 635–639 (1973).Google Scholar
15. Bai, M. R. and Liao, J., “Acoustic Analysis and Design of Miniature Loudspeakers for Mobile Phones,” Journal of the Audio Engineering Society, 53, pp. 1061–1076 (2005).Google Scholar
16. Bai, M. R. and Chen, R. L., “Optimal Design of Loudspeaker Systems Based on Sequential Quadratic Programming (SQP),” Journal of the Audio Engineering Society, 55, pp. 44–54 (2007).Google Scholar
17. Bai, M. R., Liu, C. Y. and Chen, R. L., “Optimization of Microspeaker Diaphragm Pattern Using Combined Finite Element–Lumped Parameter Models,” IEEE Transactions on Magnetics, 44, pp. 2049–2057 (2008).Google Scholar
18. Shiah, Y. C., Her, H. C., Huang, J. H. and Huang, B., “Parametric Analysis for a Miniature Loudspeaker Used in Cellular Phones,” Journal of Applied Physics, 104, 104905 (2008).Google Scholar