The Acoustic Performance of a Cranked Barrier: An Approximate Integral Formulation
The problem of sound diffraction by a cranked barrier due to a single source has been investigated. The theoretical models have been extended to consider the case of sound diffraction by a finite length cranked barrier. The proposed method has been based on the boundary integral formulation. The sound field on barrier surfaces was estimated by adopting an image source method using appropriate boundary conditions. The estimated sound field on barrier surfaces has then been substituted into a set of boundary integral equations. An approximate solution has been derived to predict sound diffraction by an acoustically hard cranked barrier placed over a flat ground. The approximate solution reduces the computational time for calculating the sound field around a three-dimensional cranked barrier for practical applications. Published data and the developed ray model have been used to compare with the approximate scheme. Measurements in an anechoic chamber have been conducted to validate the proposed formulations. Satisfactory comparisons have been obtained between the theoretical predictions and experimental data.
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Document Type: Research Article
Publication date: 01 July 2005
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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