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Planar Reflector Panels with Convex Edges

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When designing rooms for speech or music, acoustical designers often use reflector panels to direct additional sound energy to listeners. Reflector panels introduce some coloration into the reflected signal due to edge diffraction. Furthermore, planar reflector panels reflect sound primarily into a single “specular” reflected direction. This project investigates the reflected sound field from planar acoustical reflectors with rounded reflector edges away from the source side, creating a convex edge. The authors use 2D boundary element method (BEM) sound field simulations to compare the performance of the convex-edged reflectors against flat reflectors. Results show that the convex edge increases nonspecular reflections by 3 dB with each doubling of curvature radius. Because the simulations were run in two dimensions, results generalize only to long reflectors mounted above long sources, such as an orchestra or choir.
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Document Type: Research Article

Publication date: September 1, 2010

More about this publication?
  • 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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