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Technical Brief

Investigation of a Compound Perforated Panel Absorber With Backing Cavities Partially Filled With Polymer Materials

[+] Author and Article Information
C. Q. Wang

Department of Mechanical Engineering,
The University of Hong Kong,
Pokfulam Road,
Hong Kong, China
e-mails: cqwang@hku.hk; chunqi76@gmail.com

Y. S. Choy

Department of Mechanical Engineering,
The Hong Kong Polytechnic University,
Hung Hom,
Hong Kong, China
e-mail: mmyschoy@polyu.edu.hk

1Corresponding author.

Contributed by the Noise Control and Acoustics Division of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received November 17, 2014; final manuscript received February 4, 2015; published online March 13, 2015. Assoc. Editor: Liang-Wu Cai.

J. Vib. Acoust 137(4), 044501 (Aug 01, 2015) (6 pages) Paper No: VIB-14-1438; doi: 10.1115/1.4029771 History: Received November 17, 2014; Revised February 04, 2015; Online March 13, 2015

The paper concerns the sound absorption performance of a compound absorber which consists of a parallel arrangement of multiple perforated panel absorbers of different backing cavity depths partially filled with poroelastic polymer materials. Three polymer materials are considered: expandable polystyrene (EPS) foam, polymethacrylimide (PMI) foam, and polyester fiber. The normal incidence sound absorption coefficients of the compound panel absorber are tested experimentally. Results show that the former two foams can achieve similar absorption performance to the rigid cavity configuration, while the resonances shift to lower frequencies due to the changes of effective cavity depths. It is also found that the additional attenuation by polymer foams may improve sound absorption, but the effect is marginal. For polyester fiber, results show that it performs more like a single perforated panel absorber. Finite element simulation of the compound panel absorber is also discussed, and good agreement is observed between simulated and experimental results.

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References

Park, S. H., 2013, “A Design Method of Micro-Perforated Panel Absorber at High Sound Pressure Environment in Launcher Fairings,” J. Sound Vib., 332(3), pp. 521–535. [CrossRef]
Allam, S., and Åbom, M., 2011, “A New Type of Muffler Based on Microperforated Tubes,” ASME J. Vib. Acoust., 133(3), p. 031005. [CrossRef]
Fuchs, H. V., and Zha, X., 2006, “Micro-Perforated Structures as Sound Absorbers—A Review and Outlook,” Acta Acust. Acust., 92(1), pp.139–146.
Kang, J., and Brocklesby, M. W., 2005, “Feasibility of Applying Micro-Perforated Absorbers in Acoustic Window Systems,” Appl. Acoust., 66(6), pp. 669–689. [CrossRef]
Lu, Z., Jing, X., Sun, X., and Dai, X., “An Investigation on the Characteristics of a Non-Locally Reacting Acoustic Liner,” J. Vib. Control (in press) [CrossRef].
Tao, J., Jing, R., and Qiu, X., 2013, “Sound Absorption of a Finite Micro-Perforated Panel Backed by a Shunted Loudspeaker,” J. Acoust. Soc. Am., 135(1), pp. 231–238 [CrossRef].
Park, S. H., 2013, “Acoustic Properties of Micro-Perforated Panel Absorbers Backed by Helmholtz Resonators for the Improvement of Low-Frequency Sound Absorption,” J. Sound Vib., 332(20), pp. 4895–4911. [CrossRef]
Zha, X., Kang, J., Zhang, T., Zhou, X., and Fuchs, H. V., 1994, “Application Approach for Microperforated Panel Sound Absorbers,” Acta Acust., 19(4), pp. 258–265.
Yairi, M., Sakagami, K., Takebayashi, K., and Morimoto, M., 2011, “Excess Sound Absorption at Normal Incidence by Two Microperforated Panel Absorbers With Different Impedance,” Acoust. Sci. Technol., 32(5), pp. 194–200. [CrossRef]
Sakagami, K., Nagayama, Y., Morimoto, M., and Yairi, M., 2009, “Pilot Study on Wideband Sound Absorber Obtained by Combination of Two Different Microperforated (MPP) Absorbers,” Acoust. Sci. Technol., 30(2), pp. 154–156. [CrossRef]
Wang, C. Q., and Huang, L. X., 2011, “On the Acoustic Properties of Parallel Arrangement of Multiple Micro-Perforated Panel Absorbers With Different Cavity Depths,” J. Acoust. Soc. Am., 130(1), pp. 208–218. [CrossRef] [PubMed]
Sakagami, K., Kobatake, S., Kano, K., Morimoto, M., and Yairi, M., 2011, “Sound Absorption Characteristics of a Single Microperforated Panel Absorber Backed by a Porous Absorbent Layer,” Acoust. Aust., 39(3), pp. 95–100 http://www.acoustics.asn.au/journal/2011/2011_39_3_Sakagami.pdf.
Maa, D. Y., 1987, “Microperforated Panel Wide-Band Absorber,” Noise Control Eng. J., 29(3), pp. 77–84. [CrossRef]
Allard, J. F., 1993, Propagation of Sound in Porous Media: Modeling Sound Absorbing Materials, Elsevier Applied Science, New York.
Utsuno, H., Tanaka, T., Fujikawa, T., and Seybert, A. F., 1989, “Transfer Function Method for Measuring Characteristic Impedance and Propagation Constant of Porous Materials,” J. Acoust. Soc. Am., 86(2), pp. 637–643. [CrossRef]
Johnson, D. L., Koplik, J., and Dashen, R., 1987, “Theory of Dynamic Permeability and Tortuosity in Fluid-Saturated Porous Media,” J. Fluid Mech., 176(1), pp. 379–402. [CrossRef]
ISO, 1998, “Determination of Sound Absorption Coefficient and Impedance in Impedance Tubes,” International Organization for Standardization, Geneva, Switzerland, Standard No. ISO 10534-2.
Delany, M. E., and Bazley, E. N., 1970, “Acoustic Properties of Fibrous Absorbent Materials,” Appl. Acoust., 3(2), pp. 105–116. [CrossRef]
Bies, D. A., and Hansen, C. H., 1980, “Flow Resistance Information for Acoustic Design,” Appl. Acoust., 13(5), pp. 357–391. [CrossRef]
Nennig, B., Perrey-Debain, E., and Tahar, M. B., 2010, “A Mode Matching Method for Modeling Dissipative Silencers Lined With Poroelastic Materials and Containing Mean Flow,” J. Acoust. Soc. Am., 128(6), pp. 3308–3320. [CrossRef] [PubMed]
Biot, M. A., 1956, “Theory of Propagation of Elastic Waves in a Fluid-Saturated Porous Solid. I. Low Frequency Range,” J. Acoust. Soc. Am., 28(2), pp. 168–178. [CrossRef]
Attenborough, K., 1982, “Acoustical Characteristics of Porous Materials,” Phys. Rep., 82(3), pp. 179–227. [CrossRef]
Wojtowicki, J. L., and Panneton, R., 2005, “Improving the Efficiency of Sealing Parts for Hollow Body Network,” SAE Technical Paper No. 2005-01-2279 [CrossRef].
Chevillotte, F., and Panneton, R., 2007, “Elastic Characterization of Closed Cell Foams From Impedance Tube Absorption Tests,” J. Acoust. Soc. Am., 122(5), pp. 2653–2660. [CrossRef] [PubMed]

Figures

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Fig. 1

Schematic of the compound perforated panel absorber with different cavity depths. (a) Rigid configuration and (b) Polymer-based configuration.

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Fig. 2

Photo of the prototype compound perforated panel absorber

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Fig. 3

Comparison of the measured and predicted normal incidence sound absorption coefficients of the compound absorber with rigid configuration

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Fig. 4

Measured normal incidence sound absorption coefficient of the compound absorber based on EPS foam. Default cavity: D1= 48 mm, D2= 98 mm, and D3= 24 mm; shallow cavity: D1= 42 mm, D2= 98 mm, and D3= 14 mm. Results of the corresponding rigid configuration are also shown for comparison.

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Fig. 5

Measured normal incidence sound absorption coefficient of the compound absorber based on PMI foam. Results of the corresponding rigid configuration are also shown for comparison.

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Fig. 6

Measured normal incidence sound absorption coefficient of the compound absorber based on polyester fiber. Results of the rigid-configuration are for comparison. The cavity geometry is specified in Eq. (8). The uniform cavity has a constant depth D = 98 mm.

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Fig. 7

Comparison of the measured and predicted normal incidence sound absorption coefficients of the compound absorber based on polyester fiber

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Fig. 8

The measured acoustic impedance at the surfaces of two pieces of EPS foam backed by rigid walls

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Fig. 9

The predicted normal incidence sound absorption coefficients of the compound absorber based on EPS foam. (a) Comparison of the measured results and numerical predictions and (b) variation of the predicted absorption performance by neglecting the acoustic resistance of the EPS foam.

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