Searched for: author:"Sertlek, H.O."
(1 - 14 of 14)
document
Prior, M.K. (author), Duncan, A.J. (author), Sertlek, H.Ö. (author), Ainslie, M.A. (author)
Comparisons are made of sound pressure and particle acceleration predicted by two methods in the vicinity of two arrays of marine-seismic airguns. Data describing the array properties and the environmental conditions are taken from test cases designed to facilitate intermodel comparison.The two propagation approaches, one based on method of...
article 2019
document
Ainslie, M.A. (author), Laws, R.M. (author), Sertlek, H.O. (author)
Computer models can be used to predict the sound field near an airgun or airgun array. The accuracy of such predictions can be assessed either by a process of verification (comparison with alternative theoretical solution to the same computational problem) or by validation (comparison with measurement). A set of verification test problems is...
article 2019
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Sertlek, H.O. (author), Slabbekoorn, H. (author), ten Cate, C. (author), Ainslie, M.A. (author)
Effective measures for protecting and preserving the marine environment require an understanding of the potential impact of anthropogenic sound on marine life. A crucial component is a proper assessment of the anthropogenic soundscape: which sounds are present where, when and how strong? We provide an extensive case study modelling the spatial,...
article 2019
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Sertlek, H.O. (author), Aarts, G. (author), Brasseur, S. (author), Slabbekoorn, H. (author), ten Cate, C. (author), von Benda-Beckmann, A.M. (author), Ainslie, M.A. (author)
The European Union requires member states to achieve or maintain good environmental status for their marine territorial waters and explicitly mentions potentially adverse effects of underwater sound. In this study, we focused on producing maps of underwater sound from various natural and anthropogenic origins in the Dutch North Sea. The source...
bookPart 2016
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Sertlek, H.Ö. (author), Binnerts, B. (author), Ainslie, M.A. (author)
Sound mapping over large areas can be computationally expensive because of the large number of sources and large source-receiver separations involved. In order to facilitate computation, a simplifying assumption sometimes made is to neglect the sound speed gradient in shallow water. The accuracy of this assumption is investigated for ship...
article 2016
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Colin, M.E.G.D. (author), Ainslie, M.A. (author), Binnerts, B. (author), de Jong, C.A.F. (author), Karasalo, I. (author), Östberg, M. (author), Sertlek, H.O. (author), Folegot, T. (author), Clorennec, D. (author)
The SONIC (Suppression Of underwater Noise Induced by Cavitation) and AQUO (Achieve QUieter Oceans by shipping noise footprint reduction) projects were awarded within the European Seventh Framework Program to develop tools to investigate and mitigate the effects of underwater sound generated by shipping activities on marine life. Model generated...
conference paper 2015
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von Benda-Beckmann, A.M. (author), Aarts, G. (author), Sertlek, H.O. (author), Lucke, K. (author), Verboom, W.C. (author), Kastelein, R.A. (author), Ketten, D.R. (author), van Bemmelen, R. (author), Lam, F.P.A. (author), Kirkwood, R. (author), Ainslie, M.A. (author)
(UXO) are still present in the North Sea. UXO are frequently accidentally encountered by fishermen and dredging vessels. Out of concern for human safety and to avoid damage to equipment and infrastructure from uncontrolled explosions, most reported UXO found in the Dutch Continental Shelf (DCS) are detonated in a controlled way. These underwater...
article 2015
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Sertlek, H.O. (author), Ainslie, M.A. (author)
Accurate and fast estimation of propagation loss (PL) is needed for simulations of sonar or acoustic communication performance, and for environmental risk assessment. Accurate calculation of PL in range dependent and lossy waveguides can require computationally expensive wave theory techniques . In this work, a new propagation model is...
conference paper 2014
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Sertlek, H.O. (author), Ainslie, M.A. (author)
In shallow water propagation, the sound field depends on the proximity of the receiver to the sea surface, the seabed, the source depth, and the complementary source depth. While normal mode theory can predict this depth dependence, it can be computationally intensive. In this work, an analytical solution is derived in terms of the Faddeeva...
article 2014
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Sertlek, H.O. (author), Aarts, G. (author), Brasseur, S. (author), Slabbekoorn, H. (author), ten Cate, C. (author), von Benda-Beckmann, A.M. (author), Ainslie, M.A. (author)
Regulations for protecting and preserving the marine environment (e.g. in the USA and EU) often require investigating the potential effect of anthropogenic sound on marine life. The origin of underwater sound can be natural as well as anthropogenic. To assess the potential importance of various types of sounds, we constructed sound maps for the...
conference paper 2014
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Colin, M.E.G.D. (author), Binnerts, B. (author), Ainslie, M.A. (author), Benda-Beckmann, A.M. (author), Booth, C. (author), Bouton, N. (author), Harris, C.M. (author), de Jong, C.A.F. (author), Sertlek, H.O. (author), Slabbekoorn, H.W. (author)
There is an increasing concern that anthropogenic underwater noise may have a negative impact on marine life. Governmental authorities are introducing regulations to address this problem. The European Commission, for instance, has adopted the Marine Strategy Framework Directive requiring EU Member States to achieve or maintain Good Environmental...
conference paper 2014
document
Sertlek, H.O. (author), Aarts, G. (author), Brasseur, S. (author), Slabbekoorn, H. (author), ten Cate, C. (author), von Benda-Beckmann, A.M. (author), Ainslie, M.A. (author)
The EU’s Marine Strategy Framework Directive (MSFD) requires member states (MS) to achieve or maintain Good Environmental Status (GES) by 2020. Specifically, the wording of Descriptor 11 requires “underwater noise to be at levels that do not adversely affect the marine environment”. The MSFD further requires monitoring of “trends in the ambient...
conference paper 2013
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Sertlek, H.O. (author), Ainslie, M.A. (author)
The accurate and stable calculation of underwater acoustic propagation is needed for applications such as sonar performance prediction, noise mapping and acoustic communication. In this work, some widely used acoustic propagation models, based on different methods such as normal mode, ray tracing, parabolic equation and flux theory are tested on...
conference paper 2013
document
Sertlek, H.O. (author), Ainslie, M.A. (author)
Concern about possible impact of human activity on marine life has led to regulation in the USA [1,2] and the EU [3].The EU’s Marine Strategy Framework Directive [3] requires member states to achieve Good Environmental Status (GES) by 2020. Descriptor 11 of GES is “Introduction of energy, including underwater noise, is at levels that do not...
conference paper 2012
Searched for: author:"Sertlek, H.O."
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