THE PERFORMANCE OF T-PROFILE AND ASSOCIATED NOISE BARRIERS

被引：71

作者：

HOTHERSALL, DC

CROMBIE, DH

CHANDLERWILDE, SN

机构：

[1] Department of Civil Engineering, University of Bradford, Bradford

来源：

APPLIED ACOUSTICS | 1991年 / 32卷 / 04期

关键词：

D O I：

10.1016/0003-682X(91)90075-P

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

A review is presented on the results of previous research, using experimental modelling and field measurement, of the insertion loss produced by T-, Y- and arrow-profile noise barriers. A numerical model is discussed which enables the wave field in the region of a barrier with a complex profile and surface cover to be determined. An integral equation formulation of the problem is solved using the boundary element approach. Spectra of insertion loss for T-, Y- and arrow-profile barriers calculated using the model are discussed. Results for the mean insertion loss over a range of receiver positions for a broad-band source are also presented. It is concluded that for barriers with reflecting surfaces the changes in insertion loss for different profiles can be described using the concept of path difference. The introduction of absorbing upper surfaces produces a significant increase in insertion loss. In most conditions the Y- and arrow-profiles perform less efficiently than the T-profile. The marked increase in barrier efficiency when a very thin narrow cap is added to a vertical wall which has been reported by other workers was not observed.

引用

页码：269 / 287

页数：19

共 8 条

[1]

May, Osman, Highway noise barriers: New shapes, J. Sound Vibration, 71, pp. 73-101, (1980)

[2]

May, Osman, The performance of sound absorptive, reflective and T-profile noise barriers in Toronto, J. Sound Vibration, 71, pp. 65-71, (1980)

[3]

Hajek, Blaney, Evaluation of T-profile noise barriers, Transportation Research Record, 983, pp. 8-17, (1984)

[4]

Hutchins, Jones, Russell, Model studies of barrier performance in the presence of ground surfaces. Part II—Different shapes, J. Acoustical Soc. America, 75, 6, pp. 1817-1826, (1984)

[5]

Knauer, Noise barriers adjacent to I-95 in Philadelphia, Transportation Research Record, 740, pp. 13-21, (1980)

[6]

Chandler-Wilde, Hothersall, The boundary integral equation method in outdoor sound propagation, Proc. Inst. Acoustics, 9, pp. 37-44, (1987)

[7]

Delany, Bazley, Acoustical properties of fibrous absorbent materials, App. Acoustics, 3, pp. 105-116, (1970)

[8]

Bies, Hansen, Flow resistance information for acoustical design, App. Acoustics, 13, pp. 357-391, (1980)

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