Inverse Determination of Acoustic Properties of Acoustic Ventilation Cloth (Woven and Non-Woven) by Particle Swarm Optimization and Estimation of Its Effect on the Frequency Response of the Microspeaker
Source abstract
Abstract
In this work, microspeaker frequency response was determined based on measurement and simulation. The vents after the rear chamber of the microspeaker were covered with ventilation cloths. Two types of ventilation cloths (acoustic cloths) are commonly used in electroacoustic products, non-woven and woven. Non-woven cloths (5 nos.) consist of irregular meshes and woven cloths (5 nos.) consist of regular meshes. The equivalent circuit model of the microspeaker was formulated by considering five types each of non-woven and woven ventilation cloths. The acoustic properties of the ventilation cloths were estimated from the measured frequency response of the microspeaker and by subsequent use of particle swarm optimization algorithm. Estimated value of the acoustic impedances of the ventilation cloths were used in an equivalent circuit model of the microspeaker for the simulated frequency responses and subsequently compared with the anechoic chamber measurements. Based on the results, the equivalent circuit adequately simulated the measured frequency response of the microspeaker and the estimations of the acoustic impedances of the ventilation cloths were in good agreement with the measured frequency responses of the microspeaker.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Acoustic Wave Phenomena Research · Vehicle Noise and Vibration Control · Aerosol Filtration and Electrostatic Precipitation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Master’s Program of Electro-Acoustics, Feng Chia University, No. 100, Wenhwa Rd., Taichung 40724, Taiwan
Department of Applied Mechanics, Motilal Nehru National Institute of Technology Allahabad, Prayagraj 211004, Uttar Pradesh, India
Master’s Program of Electro-Acoustics and Department of Mechanical and Computer-Aided Engineering, Feng Chia University, No. 100, Wenhwa Rd., Taichung 40724, Taiwan
Funding
the Ministry of Science and Technology of Taiwan
References (44)
Show source-provided references
1. Loudspeaker design and application10.1109/TAU.1957.1165987 ↗
2. Principles of loudspeaker design and operation10.1109/TAU.1957.1166025 ↗
3. Klippel, W., and Schlechter, J. (2006, January 5–8). Measurement and visualization of loudspeaker cone vibration. Proceedings of the 121st Audio Engineering Society Convention, San Francisco, CA, USA.
4. High-efficiency low-Bl loudspeakers
5. Efficient resonant loudspeakers with large form-factor design freedom
6. Slim-type speaker for flat-panel televisions10.1109/TCE.2006.1605046 ↗
7. Closed-box loudspeaker systems part I: Analysis
8. Closed-box loudspeaker systems—Part 2: Synthesis
9. Vented-box loudspeaker systems part I: Small-signal analysis
10. Vented box loudspeaker systems—Part II
11. Vented-box loudspeaker systems, part 3: Synthesis
12. Vented-box loudspeaker systems, part 4: Appendices
13. Tashiro, M., Bank, G., and Roberts, M. (1997, January 26–29). A new flat panel loudspeaker for portable multimedia. Proceedings of the 103rd Audio Engineering Society Convention, New York, NY, USA.
14. Analysis of harmonic distortion due to uneven magnetic field in a microspeaker used for mobile phones10.1109/TMAG.2002.803579 ↗
15. Analysis of a dynamic speaker in mobile phones by considering mechanical, electrical, and magnetic coupling effects10.1063/1.1456398 ↗
16. Reduction of harmonic distortion in dual magnet type microspeaker10.1109/TMAG.2004.832114 ↗
17. Development of woofer microspeakers used for cellular phones10.1109/TMAG.2005.854928 ↗
18. Acoustic analysis and design of miniature loudspeakers for mobile phones
19. Optimization of microspeaker diaphragm pattern using combined finite element–lumped parameter models10.1109/TMAG.2008.923316 ↗
20. Electroacoustic simulation and experiment on a miniature loudspeaker for cellular phones10.1063/1.2837112 ↗
21. Parametric analysis for a miniature loudspeaker used in cellular phones10.1063/1.3021098 ↗
22. Acoustical characteristics of textile materials10.1177/004051750307300914 ↗
23. Vibroacoustic response sensitivity due to relative alignment of two anisotropic poro-elastic layers10.1121/1.4802184 ↗
24. Wintzell, L. (2013). Acoustic textiles: The case of wall panels for home environment. [Bachelor’s Thesis, The Swedish School of Textiles].
25. Grille for loudspeaker cabinet10.1121/1.385508 ↗
26. Effects of porous materials in an insert earphone on its frequency response—Experiments and simulations
27. Evaluation of acoustic characteristics for various composite ventilation material by using impedance tube10.4028/www.scientific.net/AMR.910.78 ↗
28. McIntosh, J. (November, January 29). Measurements of acoustical speaker loading impedance in headphones and loudspeakers. Proceedings of the 139th Audio Engineering Society Convention, New York, NY, USA.
29. (2021, October 01). Voice Coil. Acoustic Resistance Secret Sauce for Speakers. Available online: https://audioxpress.com/article/Acoustic-Resistance-Secret-Sauce-for-Speakers.
30. A review of acoustical methods for porous material characterisation
31. Pawar, S.J., Her, H.C., and Huang, J.H. (2010, January 23–27). Parametric simulation study of miniature loudspeaker for performance evaluation and improvement. Proceedings of the 20th International Congress on Acoustics, ICA 2010, Sydney, Australia.
32. Pawar, S.J., Tsai, Y.T., and Huang, J.H. (2010, January 8–9). Acoustic simulation and frequency response analysis of 10 inch woofer incorporating reverse engineering. Proceedings of the 1st International Conference on Recent Advances in Mechanical Engineering, ICRAME 2010, Kumaracoil, India.
33. Insert earphone modeling and measurement by IEC-60711 coupler10.1109/TUFFC.2011.1823 ↗
34. Earbud-type earphone modeling and measurement by head and torso simulator10.1016/j.apacoust.2011.10.007 ↗
35. Structural modifications of headphone front chamber for better frequency response: Experimental and simulation studies10.1007/s40857-020-00211-4 ↗
36. Kennedy, J.C., and Eberhart, R. (December, January 27). Particle swarm optimization. Proceedings of the ICNN’95—International Conference on Neural Networks, Perth, WA, Australia.
37. Eberhart, R.C., and Kennedy, J. (1995, January 4–6). A new optimizer using particle swarm theory. Proceedings of the MHS’95—Sixth International Symposium on Micro Machine and Human Science, Nagoya, Japan.
38. A review of particle swarm optimization. Part I: Background and development10.1007/s11047-007-9049-5 ↗
39. Heise, S., Hlatky, M., and Loviscach, J. (2009, January 7–10). Automatic adjustment of off-the-shelf reverberation effects. Proceedings of the 126th Audio Engineering Society Convention, Munich, Germany.
40. Gasparini, M., Capucci, E., Cecchi, S., Toppi, R., and Piazza, F. (2016, January 4–7). A comparison of optimization methods for compression driver design. Proceedings of the 140th Audio Engineering Society Convention, Paris, France.
41. Optimization of micro-perforated sound absorber using Particle Swarm Optimization (PSO)10.1088/1757-899X/670/1/012046 ↗
42. Some applications of the PSO for optimization of acoustic filters10.1016/j.apacoust.2014.09.007 ↗
43. (2021, October 19). MathWorks R2021b. Particleswarm. Available online: https://in.mathworks.com/help/gads/particleswarm.html?s_tid=srchtitle_particleswarm_1.
44. The particle swarm-explosion, stability, and convergence in a multidimensional complex space10.1109/4235.985692 ↗