The Sound Absorption Properties Comparison of Metal Foams and Flexible Cellular Materials

Abstract:

The third octave sound absorption coefficient testing is conducted to compare the sound absorption properties metal foam and flexible cellular materials, by using sound absorption tester with the method of trasfer function sound absorption tester with the method of trasfer function. The sound absorption mechanisms are discussed by changing the parameters of sound absorption structure, such as the thickness of matrix materials and the thickness of cavity. The results show that pearl wool and glass wool exhibited excellent sound absorption properties. The peak value of sound absorption coefficient for pearl wool reaches to 0.991, and for glass wool, 0.985. The average sound absorption coefficient for pearl wool is 0.729, and for glass wool, 0.679. Among of three metal foams, the foamed aluminum material exhibited optimum sound absorption properties, and is superior to flexible sound absorption materials. The peak value of sound absorption coefficient reaches to 0.993, and the average value reaches to 0.781. This can be attributed to the flow resistance, porosity, thickness, cavity and structure factor, which influence the sound absorption of open cell materials.

• Periodical: Materials Science Forum (Volume 933)
• Pages: 357-366
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.933.357
• Online since: October 2018
• Authors: Li Si Liang, Xiao Lei Wu*, Na Ni Ma, Jin Jing Du, Man Bo Liu
• Keywords: Cavity, Flexible Cellular Materials, Metal Foam, Sound Absorption, Thickness

References

[1] Wang B S,Zhang J P.An investigation on manufac-ture of foamed metals and sound-absorbing property[J].Chemical Engineering,2003,(4): 8-10.

[2] Z H A N G S iw en .Locally resonantb and gaps and their applicaions in low -frequency vibration and noise reduction[D].X i'an：X i'a n Jiaotong University,(2014).

[3] MA D Y. Noise and Vibration Control[M]. Beijing Machine Press,(2002).

[4] Li Haibin. Study on sound absorption behavior of metal foam[D]. North China Electric Power University(He Bei) ,(2009).

[5] PEISKER D,DOKTOROWSKI A,DITTRICH D.Contribution on the influence of transformation structures under consideration of austenite deformation[J].Seel Res,2001,72(3):111-114.

DOI: 10.1002/srin.200100093

[6] Wang L C,Wang F. Sound Absorption Properties of Aluminium Foam[J].Metallic Functional Materials.2004,11(5):17-18.

[7] Yu Haijun,Yao Guangchun,Cheng Yan, et al.Influence factors of sound absorption properties of closed-cell aluminum foam[J]., The Chinese Journal of Nonferrous Metals,2008,18(08):1487-1491.

[8] D Oliva,V Hongisto.Sound absorption of porous materials-Accuracy of prediction methods[J].Applied Acoustics, 2013, 74(12):1473-1479.

DOI: 10.1016/j.apacoust.2013.06.004

[9] Wang Y H, Zhang C C, Wang J,et al.Analysis of sound-absorbing performance of bionic porous material[J]. Journal of Jilin University(Engineering and Technology Edition) 2012,46(2):1442-1447.

[10] Liu Y G,Wang X L.Influence of frame parameters of viscoelastic foams on sound-absorbing performance. Journal of Vibration and Shock. 2016,35(20):137-141,159.

[11] Ma S K,Yang J,Wu B B.Effects of MPP on the Sound Absorptive Property of Porous Materials[J].Journal of Qingdao University(Natural Science Edition). 2016,29(3):79-82,88.

[12] Ding Y X,Xu Y,Xu N.Experimental Study on Sound Absorption Performance of Porous Copper-Fibrous Material[J]. Journal of Northwestern Polytechnical University.2012,30 (4):553-557.

[13] Xiang J H,Liao R D,Pu D Y. Performance of Sound-Absorbing Material Based on Flow Resistivity[J]. Transactions of Beijing Institute of Technology. 2009,29(11):1018-1021,1034.

[14] Liu X,Liu J,Su X. Simulation model for the absorption coefficients of double layered nonwovens . [J]. Fibres & Textiles in Eastern Europe, 2012(04):102-107.

[15] Wu J H,Ma F Y,Zhang S W,et al. Application of Acoustic Metamaterials in Low-frequency Vibration and Noise Reduction[J]. Journal of Mechanical Engineering. 2016,52(13):68-78.

DOI: 10.3901/jme.2016.13.068

[16] Lu M,Yao X Y,Liu P S,et al.Sound Absorption Performance of Nickel Foam in Range of Intermediate Frequency[J]. Chinese Journal of Raremetals. 2015,39(1):49-54.

[17] Liang L S,Wu J N,Liu M B et al. Effect of Perforation Arrangement and Size on Sound Absorption Property of Closed-Cell Aluminum Foam[J]. Nonferrous Metals(Extractive Metallurgy).2016(2):53-57.

[18] YU H J,YAO G C,WANG X L,et al.Research on sound insulation property of Al-Si closed-cell aluminum foam bare board material[J].Trans Nonferrous Met Soc China,2007,17(1):93-98.

DOI: 10.1016/s1003-6326(07)60054-5

[19] MA D Y. Acoustic manual[M].Beijing Science Press,(2004).

[20] MA D Y. Modern acoustic theory foundation[M].Beijing Science Press,(2004).

[21] MA D Y. Noise control[M].Beijing Science Press,(1987).