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Indirect sound transmission with joist and solid floors

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Field values of airborne sound insulation of floating joist floors are considerably lower than laboratory values. To investigate this difference the indirect transmission past such a floor with an average airborne insulation of 43 db has been measured in the field by a method previously described. The transmission past a similarly situated floating concrete floor, insulation 49 db, has also been measured for comparison. In both cases the value of airborne insulation was found to be determined mainly by flanking transmission and it appears that the higher insulation of the concrete floor in the same structure is due to the junction of the floor with the walls attenuating the flanking energy. There is little indirect insulation with the joist floor since it connects with the walls at very few places.
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Document Type: Research Article

Publication date: January 1, 1952

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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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