Acoustic performance of noise barriers with acoustic diffusers for high speed railway
01 Jan 2015-
TL;DR: In this article, the authors studied the acoustic performance of noise barriers with quadratic residue diffusers for high speed railway noise problem by mounting the noise barrier at the side of the track.
Abstract: It is effective to solve the high speed railway noise problem by mounting the noise barrier at the side of the track. The performance of noise barriers largely depends on their profiles. This paper studied acoustic performance of noise barriers with quadratic residue diffusers for high speed railway. The properties of noise barriers are optimized based on acoustic diffuser theory. The insertion loss is simulated by establishing a numerical model to evaluate the acoustic performance of noise barriers. The introduced noise barrier is compared with the traditional rectangular and T-shaped noise barrier of the same height.
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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.
74 citations
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.
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TL;DR: In this article, a numerical model using boundary element techniques is discussed which enables the insertion loss for various noise barriers of complex profile and surface cover to be calculated, applied to single-foundation noise barriers to which additional side-panels are added to create fork-like profiles.
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TL;DR: In this article, a study of a performance of various track-side railway noise barriers, determined by using a two-dimensional numerical boundary element model, is presented, which has been adapted to allow the sources to exhibit dipole-type radiation characteristics.
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