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On-line Access: 2011-01-06

Received: 2010-02-20

Revision Accepted: 2010-07-05

Crosschecked: 2010-12-13

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Journal of Zhejiang University SCIENCE A 2011 Vol.12 No.1 P.78-86


Performance of passive and reactive profiled median barriers in traffic noise reduction

Author(s):  Mohammad Reza Monazzam, Samaneh Momen Bellah Fard

Affiliation(s):  Occupational Hygiene Department, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran; more

Corresponding email(s):   mmonazzam@gmail.com

Key Words:  Absorption, Quadratic residue diffuser (QRD), Primitive root diffuser (PRD), Noise barrier

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Mohammad Reza Monazzam, Samaneh Momen Bellah Fard. Performance of passive and reactive profiled median barriers in traffic noise reduction[J]. Journal of Zhejiang University Science A, 2011, 12(1): 78-86.

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%T Performance of passive and reactive profiled median barriers in traffic noise reduction
%A Mohammad Reza Monazzam
%A Samaneh Momen Bellah Fard
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1000065

T1 - Performance of passive and reactive profiled median barriers in traffic noise reduction
A1 - Mohammad Reza Monazzam
A1 - Samaneh Momen Bellah Fard
J0 - Journal of Zhejiang University Science A
VL - 12
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EP - 86
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1000065

Median noise barriers, like parallel noise barriers, can be employed to reduce the impact of traffic on roadside communities via the direct propagation path. The performance of different shapes of median barriers was compared using reactive and passive surfaces and a 2D boundary element method (BEM). In the case of reactive surfaces, quadratic residue diffusers (QRDs) and primitive root diffusers (PRDs) were used on the top and stem surfaces of median barriers. To introduce passive barriers, two different absorbent materials including fibrous material and a grass surface with flow resistivity of 20 000 and 2500 kg/(s·m2), respectively, were similarly applied. The effect of thin absorptive barriers was similar at lower frequencies and better at mid and high frequencies to that of their equivalent rigid barriers. More improvement was achieved by covering the top surface of thick barriers with grass rather than with fibrous material. The performance of QRD and PRD barriers where the diffuser was located on the top surface was more frequency dependent than that of barriers coated with fibrous material. A comparison of the average A-weighted insertion loss in the thick barriers showed that the greatest improvement (2.59 dB (A)) was achieved using a barrier of 30-cm thickness covered with grass.

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[1]BS EN 1793-3:1998. Road Traffic Noise Reducing Devices— Test Method for Determining the Acoustic Performance. Part 3: Normalized Traffic Noise Spectrum. British Standard.

[2]Cheng, W.F., Ng, C.F., 2001. The acoustic performance of an inclined barrier for high-rise residents. Journal of Sound and Vibration, 242(2):295-308.

[3]Cox, T.J., D’Antonio, P., 2004. Acoustic Absorbers and Diffusers: Theory, Design and Application. Spon Press, Taylor & Francis Publications.

[4]Crombie, D.H., Hothersall, D.C., Chandler-Wilde, S.N., 1995. Multiple-edge noise barrier. Applied Acoustics, 44(4):353-367.

[5]Delany, M.E., Bazely, E.N., 1970. Acoustical properties of fibrous absorbent material. Applied Acoustics, 3(2):105-116.

[6]Donnell, E., Hughes, W., 2005. State Transportation Agency Median Design and Safety Practices: Results from a Survey. Transportation Research Board 84th Annual Meeting, Washington, DC.

[7]Fujiwara, K., 1995. A study of the sound absorption of a quadratic-residue type diffuser. Acustica, 81:370-378.

[8]Fujiwara, K., Hothersall, D.C., Kim, C., 1998. Noise barriers with reactive surfaces. Applied Acoustics, 53(4):225-272.

[9]Galland, M., Mazeaud, B., Sellen, N., 2005. Hybrid passive/ active absorbers for flow ducts. Applied Acoustics, 66(6):691-708.

[10]Hothersall, D.C., Chandler-Wilde, S.N., Hajmirzae, M.N., 1991. Efficiency of single noise barriers. Journal of Sound and Vibration, 146(2):303-322.

[11]Lamancusa, J.S., 2009. Noise Control, Outdoor Sound Propagation. Pennsylvania, USA. Available from http://www.me.psu.edu/lamancusa/me458/10_osp.pdf [Accessed on Sept. 6, 2009]

[12]Londhe, N., Rao, M.D., Blough, J.R., 2009. Application of the ISO 13472-1 in situ technique for measuring the acoustic absorption coefficient of grass and artificial turf surfaces. Applied Acoustics, 70(1):129-141.

[13]Martin, S.J., Hothersall, D.C., 2002. Numerical modeling of median road traffic noise barriers. Journal of Sound and Vibration, 251(4):671-681.

[14]May, D.N., Osman, M.M., 1980. Highway noise barriers: New shapes. Journal of Sound and Vibration, 71(1):73-101.

[15]Mechel, F.P., 1995. The wide-angle diffuser—a wide-angle absorber? Acoustica., 81:379-401.

[16]Monazzam, M.R., 2009. Optimization of profiled diffuser barrier using the new multi-impedance discontinuities model. International Journal of Environmental Research, 3(3):327-334.

[17]Monazzam, M.R., Lam, Y.W., 2005. Performance of profile single noise barriers covered with quadratic residue diffusers. Applied Acoustics, 66(6):709-730.

[18]Monazzam, M.R., Lam, Y.W., 2008. Performance of T-shape barriers with top surface covered with absorptive quadratic residue diffusers. Applied Acoustics, 69(2):93-109.

[19]Monazzam, M.R., Nassiri, P., 2009. Contribution of quadratic residue diffusers to efficiency of tilted profile parallel highway noise barriers. Iranian Journal of Environmental Health Science & Engineering, 6(4):271-284.

[20]Watts, G.R., 1996. Acoustics performance of parallel traffic noise barriers. Applied Acoustics, 47(2):95-119.

[21]Watts, G.R., Godfrey, N.S., 1999. Effects on roadside noise levels of sound absorptive materials in noise barriers. Applied Acoustics, 58(4):385-402.

[22]Watts, G.R., Crombie, D.H., Hothersall, D.C., 1994. Acoustic performance of new design of traffic noise barriers: Full scale tests. Journal of Sound and Vibration, 177(3):289-305.

[23]Wu, T., Cox, T.J., Lam, Y.W., 2000. From a profiled diffuser to an optimized absorber. The Journal of the Acoustical Society of America, 108(2):643-650.

[24]Wu, T., Cox, T.J., Lam, Y.W., 2001. A profiled structure with improved low frequency absorption. The Journal of the Acoustical Society of America, 110(6):3064-3070.

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