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Determination of Measurement Uncertainties in Building Acoustics by Interlaboratory Tests. Part 2: Sound Absorption Measured in Reverberation Rooms

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The uncertainty of the sound absorption coefficient is investigated by a thorough analysis of interlaboratory test data. Assuming a linear relationship between the standard deviation of reproducibility and the sound absorption coefficient, an estimate for the uncertainty is derived which depends also on frequency. Additionally, a realistic estimate for the standard deviation of repeatability is given. The same basic model turns out to be applicable to the sound absorption coefficient in one-third octave bands and to the weighted sound absorption coefficient. Finally it is shown how these findings can be extended to the uncertainty of the equivalent absorption area.
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Document Type: Research Article

Publication date: November 1, 2018

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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