Parameters of sound propagation in granular absorbent materials
From measurements of acoustical impedance of homogeneous absorbent materials made with the method of stationary waves, it is possible to determine the parameters of propagation. Measurements are made with two thicknesses of the material, one double of the other. The procedure followed for the calculation is indicated and some diagrams are proposed to obtain more easily the parameters of propagation. Examples are given of the method proposed and the parameters are calculated for small spherical leaden balls and sand of various sizes.
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Document Type: Research Article
Publication date: January 1, 1951
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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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