Searched for: author%3A%22de+Jong%2C+C.A.F.%22
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Heinis, F. (author), de Jong, C.A.F. (author), von Benda-Beckmann, A.M. (author)
report 2022
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Putland, R.L. (author), de Jong, C.A.F. (author), Binnerts, B. (author), Farcas, A. (author), Merchant, N.D. (author)
Underwater radiated noise from shipping is globally pervasive and can cause deleterious effects on marine life, ranging from behavioural responses to physiological effects. Acoustic modelling makes it possible to map this noise over large areas and long timescales, and to test mitigation scenarios such as ship speed reduction or spatial...
article 2022
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Kastelein, R.A. (author), de Jong, C.A.F. (author), Tougaard, J. (author), Helder-Hoek, L. (author), Defillet, L.N. (author)
article 2022
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von Benda-Beckmann, A.M. (author), Ketten, D.R. (author), Lam, F.P.A. (author), de Jong, C.A.F. (author), Muller, R.A.J. (author), Kastelein, R.A. (author)
Application of a kurtosis correction to frequency-weighted sound exposure level (SEL) improved predictions of risk of hearing damage in humans and terrestrial mammals for sound exposures with different degrees of impulsiveness. To assess whether kurtosis corrections may lead to improved predictions for marine mammals, corrections were applied to...
article 2022
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de Jong, C.A.F. (author), Jansen, H.W. (author)
This report is the result of Phase 2 of a two-phase project for the standardization of measurement, processing and reporting procedures for offshore oil and gas exploration and production-related sound sources. This project was carried out for the Sound and Marine Life Joint Industry Programme of the International Association of Oil & Gas...
report 2021
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MacGillyvray, A. (author), de Jong, C.A.F. (author)
Underwater sound mapping is increasingly being used as a tool for monitoring and managing noise pollution from shipping in the marine environment. Sound maps typically rely on tracking data from the Automated Information System (AIS), but information available from AIS is limited and not easily related to vessel noise emissions. Thus, robust...
article 2021
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Heinis, F. (author), de Jong, C.A.F (author), von Benda-Beckmann, A.M. (author)
Abstract 2 Foreword 1 Introduction 1.1 Background 1.2 Objective 1.3 Scope 1.4 Approach 1.5 Report structure 2 The determination of the cumulative effects of the development of offshore wind on marine mammals ..... 14 2.1 Overview of the steps in the staged procedure ....... 14 2.2 Calculation of sound propagation ............ 15 2.3 Dose...
report 2021
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de Jong, C.A.F. (author), Jansen, H.W. (author), Halvorsen, M.B. (author), Hannay, D.E. (author), Ainsley, M.E. (author), Racca, R.G. (author)
This report is the result of Phase 2 of a two-phase project for the standardization of measurement, processing and reporting procedures for offshore oil and gas exploration and production-related sound sources. This project was carried out for the E&P Sound and Marine Life Joint Industry Programme of the International Association of Oil & Gas...
report 2021
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Kastelein, R.A. (author), Helder-Hoek, L. (author), Cornelisse, S.A. (author), von Benda-Beckmann, A.M. (author), Lam, F.P.A. (author), de Jong, C.A.F. (author), Ketten, D.R. (author)
Noise-induced temporary hearing threshold shift (TTS) was studied in a harbor porpoise exposed to impulsive sounds of scaled-down airguns while both stationary and free-swimming for up to 90 min. In a previous study, ∼4 dB TTS was elicited in this porpoise, but despite 8 dB higher single-shot and cumulative exposure levels (up to 199 dB re 1...
article 2020
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McQueen, A.D. (author), Suedel, B.C. (author), de Jong, C.A.F. (author), Thomsen, F. (author)
There is an increasing international focus to understand and quantify the potential ecological risks of low-frequency underwater sounds produced from anthropogenic activities (e.g., commercial shipping, dredging, construction, and offshore energy production). For dredge operations, a risk-based approach has been proposed for identifying,...
article 2020
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von Benda-Beckmann, A.M. (author), Ketten, D.R. (author), de Jong, C.A.F. (author), Lam, F.P.A. (author), Kastelein, R.A. (author)
This report describes the results of two separate IOGP JIP-funded projects (I) and (II), both aimed at studying Temporary Threshold Shift (TTS) in harbor porpoises (Phocoena phocoena) exposed to repeated airgun exposures. The objective of this study was to obtain data to develop a scientifically valid method to predict TTS growth, recovery, and...
report 2020
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Kastelein, R.A. (author), Huijser, L.A.E. (author), Cornelisse, S. (author), Helder-Hoek, L. (author), Jennings, N. (author), de Jong, C.A.F. (author)
article 2019
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Kastelein, R.A. (author), von Benda-Beckmann, A.M. (author), Lam, F.-P.A. (author), Jansen, E. (author), de Jong, C.A.F. (author)
article 2019
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Jansen, H.W. (author), de Jong, C.A.F. (author)
Thecontributionofshippingnoisetothebackground noise in the seas can be estimated by shipping noise maps. Noise maps can be made by applying appropriate modeling tools for underwater sound propagation and ship source levels to information on the acoustic environment and on the ship traffic in the area of the map. The development of reliable source...
article 2017
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Bosschaart, C. (author), Jansen, H.W. (author), de Jong, C.A.F. (author), Basten, T. (author)
A concept for underwater machinery noise mitigation of future civil and military ships is the application of a common deck structure, supporting multiple machines, which is installed on resilient mounts on the ship's foundation structure. TNO is addressing the availability and testing of tools to be able to set realistic targets for the radiated...
conference paper 2017
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Kastelein, R.A. (author), Helder-Hoek, L. (author), van de Voorde, S. (author), von Von Benda-Beckmann, A.M. (author), Lam, F.P.A. (author), Jansen, E. (author), de Jong, C.A.F. (author), Ainslie, M.A. (author)
In seismic surveys, reflected sounds from airguns are used under water to detect gas and oil below the sea floor. The airguns produce broadband high-amplitude impulsive sounds, which may cause temporary or permanent threshold shifts (TTS or PTS) in cetaceans. The magnitude of the threshold shifts and the hearing frequencies at which they occur...
article 2017
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Ainslie, M.A. (author), de Jong, C.A.F. (author)
Because of the history of sonar and sonar engineering, the concept of “source level” is widely used to characterize anthropogenic sound sources, but is it useful for sources other than sonar transmitters? The concept and applicability of source level are reviewed for sonar, air guns, explosions, ships, and pile drivers. International efforts...
conference paper 2016
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Erbe, C. (author), Ainslie, M.A. (author), de Jong, C.A.F. (author), Racca, R. (author), Stocker, M. (author)
As concern about anthropogenic noise and its impacts on marine fauna is increasing around the globe, data are being compared across populations, species, noise sources, geographic regions, and time. However, much of the raw and processed data are not comparable due to differences in measurement methodology, analysis and reporting, and a lack of...
conference paper 2016
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de Jong, C.A.F. (author), Ainslie, M.A. (author), Heinis, F. (author), Janmaat, J. (author)
The underwater sound produced during construction of the Port of Rotterdam harbor extension (Maasvlakte 2) was measured, with emphasis on the contribution of the trailing suction hopper dredgers during their various activities: dredging, transport, and discharge of sediment. Measured source levels of the dredgers, estimated source levels of...
bookPart 2016
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Bolle, L.J. (author), de Jong, C.A.F. (author), Bierman, S.M. (author), van 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)
Concern exists about the potential effects of pile-driving sounds on fish, but evidence is limited, especially for fish larvae. A device was developed to expose larvae to accurately reproduced pile-driving sounds. Controlled exposure experiments were carried out to examine the lethal effects in common sole larvae. No significant effects were...
conference paper 2016
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