Searched for: subject:"Sound%5C+levels"
(1 - 16 of 16)
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Bolle, L. (author), de Jong, C.A.F. (author), Bierman, S.M. (author), van Beek, P.J.G. (author), Wessels, P.W. (author), Blom, E. (author), van Damme, C.J.G. (author), Winter, H.V. (author), Dekeling, R.P.A. (author)
In view of the rapid extension of offshore wind farms, there is an urgent need to improve our knowledge on possible adverse effects of underwater sound generated by pile-driving. Mortality and injuries have been observed in fish exposed to loud impulse sounds, but knowledge on the sound levels at which (sub-)lethal effects occur is limited,...
conference paper 2013
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Dekeling, R.P.A. (author), Tasker, M. (author), Ainslie, M.A. (author), Andersson, M. (author), André, M. (author), Borsani, F. (author), Brensing, K. (author), Castellote, M. (author), Dalen, J. (author), Folegot, T. (author), van der Graaf, S. (author), Leaper, R. (author), Liebschner, A. (author), Pajala, J. (author), Robinson, S. (author), Sigray, P. (author), Sutton, G. (author), Thomsen, F. (author), Werner, S. (author), Wittekind, D. (author)
The European Marine Strategy Framework Directive requires European member states to develop strategies for their marine waters that should lead to programmes of measures that achieve or maintain Good Environmental Status (GES) in all European seas by 2020. As an essential step towards reaching GES, member states should establish monitoring...
conference paper 2013
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de Jong, C.A.F. (author), Ainslie, M.A. (author), Heinis, F. (author), Janmaat, J. (author)
The Port of Rotterdam is expanding to meet the growing demand to accommodate large cargo vessels. One of the licensing conditions was the monitoring of the underwater sound produced during its construction, with an emphasis on the establishment of acoustic source levels of the Trailing Suction Hopper Dredgers during their various activities:...
conference paper 2013
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Thomsen, F. (author), Borsani, F. (author), Clarke, D. (author), de Jong, C.A.F. (author), de Witt, P. (author), Holtkamp, M. (author), Goethals, F. (author), San Martin, E. (author), Spadaro, P. (author), van Raalte, G. (author), Jensen, A. (author)
The World Organisation of Dredging Associations (WODA) has identified underwater sound as an environmental issue that needs further consideration. A WODA Expert Group on Underwater Sound (WEGUS) was established to provide a guidance paper on dredging sound, impact on aquatic biota and advice on underwater sound monitoring procedures. The paper...
conference paper 2013
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Nijhof, M.J.J. (author), van der Eerden, F.J.M. (author)
National legislation enforces a limit on the Sound Levels of outdoor military shooting ranges observed in nearby residential areas. These restrictions directly influence the number of shots that may be fired at a specific shooting range, which may conflict with the required/ scheduled training capacity for that specific range. If desired, sound...
conference paper 2013
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Vos, J. (author), Houben, M.M.J. (author), van der Ploeg, F. (author), Buikema, E. (author)
The objective of the present laboratory studies was to enable refinements of the current rating procedure for low frequency sounds. To increase our insight into a relevant spectral issue, groups of adjacent frequency bands around 40, 50, and 63 Hz were presented at various sound level combinations. It was concluded that an energy-based summation...
conference paper 2010
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Wessels, P.W. (author), Basten, T.G.H. (author), van der Eerden, F.J.M. (author)
In this paper the approach for an acoustical model based monitoring network is demonstrated. This network is capable of reconstructing a noise map, based on the combination of measured sound levels and an acoustic model of the area. By pre-calculating the sound attenuation within the network the noise map can be shown in real-time. The...
conference paper 2010
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van der Eerden, F.J.M. (author), van der Berg, F. (author)
In the densely populated area of the Netherlands, the objective of the Netherlands Ministry of Defence is to find an optimal balance between military training and the impact on the surrounding civilian community. A special case concerns large weapons, such as artillery or demolitions, which create high-energy blast waves. These waves have a low...
conference paper 2010
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Salomons, E.M. (author), Polinder, H. (author), Lohman, W. (author), Zhou, H. (author), Borst, H. (author), TNO Bouw en Ondergrond (author)
A new engineering model for sound propagation in cities is presented. The model is based on numerical and experimental studies of sound propagation between street canyons. Multiple reflections in the source canyon and the receiver canyon are taken into account in an efficient way, while weak reflections by distant buildings involving multiple...
conference paper 2009
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de Bree, H.E. (author), Basten, T.G.H. (author), TNO Industrie en Techniek (author)
For compliance test purposes, the noise level of a HVAC is usually measured with a pressure microphone positioned at a certain distance. This measurement is normally performed in an anechoic room. However, this method doesn't provide the engineer any insight on what noise sources do contribute to the overall noise level measured. A new...
conference paper 2008
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van der Eerden, F.J.M. (author), Salomons, E.M. (author), Beeks, A.A.F.M. (author), TNO Industrie en Techniek (author)
With the extra runway at Amsterdam Schiphol Airport, introduced in 2003, the noise nuisance for local residents increased due to increased groundnoise. In a case study the effect of enhanced ground absorption on the propagation of low-frequency noise from aircraft ground operations, e.g. departing aircraft, has been investigated. The study was...
conference paper 2007
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van den Berg, F. (author), van der Eerden, F.J.M. (author), TNO Industry and Science, Acoustics Department, Stieltjesweg 1, 2628 CK Delft, Netherlands (author)
Large weapons, such as armor, artillery or demolitions, create a high-energy blast wave. It has a low frequency content, typically between 15 and 125 Hz, and can propagate over large distances. As a result it is a relative important cause for annoyance. Mitigation measures need to be close to the source for best effectiveness, but due to the...
conference paper 2007
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Gerretsen, E. (author), TNO Industrie en Techniek (author)
The best approach to include lightweight building elements in prediction models for airborne and impact sound insulation between rooms, as in EN 12354, is not yet completely clear. Two aspects are at least of importance, i.e. to derive the sound reduction index R for lightweight elements for resonant vibrations only and the appropriate method to...
conference paper 2007
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Miedema, H.M.E. (author), Instituut voor Ruimtelijke Organisatie TNO (author)
Relationships between exposure to noise [metric: day-night level (DNL) or day-evening-night level (DENL)] from a single source (aircraft, road traffic, or railways) and annoyance based on a large international dataset have been published earlier. Also for stationary sources relationships have been assessed. Here the annoyance equivalents model...
article 2004
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Vos, J. (author), TNO Technische Menskunde (author)
In a previous study on the annoyance caused by a great variety of shooting sounds [J. Acoust. Soc. Am. 109, 244-253 (2001)], it was shown that the annoyance, as rated indoors with the windows closed, could be adequately predicted from the outdoor A-weighted and C-weighted sound-exposure levels [ASEL (L(AE)) and CSEL (L(CE))] of the impulse...
article 2003
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Dings, P.C. (author), Dittrich, M.G. (author), Technisch Physische Dienst TNO - TH (author)
Surface roughness on 150 railway wheels and on the rails of 30 sites in the Netherlands have been measured. Block braked wheels were found to show higher roughnesses than the rail at any site. The smoothest rail is 8 dB smoother than the smoothest wheel. It was concluded that in reducing railway rolling noise NS must start to find ways to lower...
article 1996
Searched for: subject:"Sound%5C+levels"
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