Estimation of Night Traffic Noise Levels
A method to estimate levels of night traffic noise Ln is presented with the assumption that the day levels Ld are known, applying the expression Ln = Ld –Ld – n , where Ld – n is the difference between Ld and Ln . This procedure implies the direct measurement of Ld – n in some streets of the city by means of long-term measurements (more than 24 hours) and the extrapolation of these results to the remaining streets. The estimation of Ln using this procedure allows a substantial saving of resources as it does not demand the repetition of all measurement points used in determining Ld , given that Ld – n only depends on traffic variation. It is demonstrated that Ld – n parameter can follow a normal distribution, and that statistically it is not a constant value for all streets in a given city but it is necessary to establish at least two different categories of streets to enable accurate estimation.
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Document Type: Research Article
Publication date: July 1, 2008
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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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