Journal ArticleDOI
Noise barriers with reactive surfaces
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TLDR
In this article, the insertion loss of rectangular, T-shaped and cylindrical edged noise barriers with rigid, absorbing and soft surfaces was studied. But the authors only used the boundary element numerical modeling method.About:
This article is published in Applied Acoustics.The article was published on 1998-04-01. It has received 87 citations till now. The article focuses on the topics: Insertion loss.read more
Citations
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Acoustic design by topology optimization
TL;DR: In this article, the authors proposed a topology optimization method based on continuous material interpolation functions in the density and bulk modulus to reduce the sound pressure amplitude in the shadow zone behind a sound barrier.
Journal ArticleDOI
Performance of noise barriers with various edge shapes and acoustical conditions
Takashi Ishizuka,Kyoji Fujiwara +1 more
TL;DR: In this paper, the performance of barriers having different shapes and surface conditions were tested using the boundary element method in a well-controlled environment and the insertion losses for six receiver positions were averaged and compared.
Journal ArticleDOI
Urban cities and road traffic noise: Reduction through vegetation
Lai Fern Ow,Subhadip Ghosh +1 more
TL;DR: In this article, the effect of roadside vegetation on the reduction of road traffic noise under varying planting intensities was investigated. And the results showed that the traffic noise was reduced by 50% when vegetation was enhanced from a minimal to moderate planting intensity.
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Performance of profiled single noise barriers covered with quadratic residue diffusers
TL;DR: In this paper, the authors investigated the acoustic performance of noise barriers with quadratic residue diffuser (QRD) tops, and with T-, Arrow-, Cylindrical and Y-shape profiles.
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Optimisation with genetic algorithm of the acoustic performance of T-shaped noise barriers with a reactive top surface
TL;DR: In this paper, a 2D boundary element method code is used to simulate the acoustical efficiency of T-shaped noise barriers whose top is covered with a series of wells.
References
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Efficiency of single noise barriers
TL;DR: In this paper, a numerical model is described which enables the sound field in the region of outdoor noise barriers to be calculated by using the boundary element method, and the non-uniqueness of solution of the method, producing unreliable results in some conditions, is discussed.
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Highway noise barriers: new shapes
D.N. May,N.M. Osman +1 more
TL;DR: In this paper, the relative acoustical performance of a number of relatively novel noise barriers in typical highway situations was evaluated by scale model testing of a variety of barrier types, including thin, wide, T-profiled, cylindrically topped, corrugated, inclined, Y-profiant, arrow-profi cation, and some treated with sound absorptive material.
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Diffraction of sound around barriers: Use of the boundary elements technique
TL;DR: In this article, the use of the boundary elements technique permits precise evaluation of the acoustic pressure field diffracted by barriers of different shapes on a flat ground, and different examples are investigated and excess attenuations obtained by shape changes are compared.
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The vibro-impact response of a harmonically excited and preloaded one-dimensional linear oscillator
TL;DR: In this paper, the nonlinear response of a one-dimensional oscillator preloaded against a stop and subjected to harmonic excitation is investigated and the analysis includes a discussion of the existence and stability of subharmonic single impact responses and a comparison between the preloaded case and impacting with a clearance.
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Acoustic Performance Of New Designs Of Traffic Noise Barriers: Full Scale Tests
TL;DR: In this article, full scale tests of acoustical performance are reported on a range of promising traffic noise barrier shapes which had previously been identified by mathematical and scale modelling work. But the results of these tests were limited to a flat grassland area and at heights of 1·5 and 4·5 m.
Related Papers (5)
Performance of noise barriers with various edge shapes and acoustical conditions
Takashi Ishizuka,Kyoji Fujiwara +1 more