The Uncertainty Declaration of Building Acoustics Measurements: How to Select the Uncertainty of Reproducibility from Inter-Laboratory Tests
This paper deals with the standard deviation of reproducibility obtained from multiple Inter-Laboratory Tests (ILTs), whose average values were standardized in ISO 12999-1. The reproducibility obtained in this way is intended to be used for the declaration of uncertainty in test reports of building acoustics measurements. Therefore it is necessary that the declared uncertainty be representative of all the specimens, or products, that could be tested. This paper demonstrates that the new standard deviation σR95 , introduced for the first time in ISO 12999-1, leads to an overcoverage with respect to the desired 95% coverage probability. Moreover, two other methods are presented, the former based on a Bayesian analysis and the latter on random variance and fixed mean, to demonstrate that the reproducibility standard deviation σR , where the reproducibility variance σ 2 R is the mean value of the variances of all the ILTs included in ISO 12999-1, is the natural choice for the declaration of uncertainty.
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Document Type: Research Article
Publication date: 01 March 2018
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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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