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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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Stokman, G. (author), van den Hoek, A.M. (author), Denker Thorbekk, D. (author), Pieterman, E.J. (author), Skovgård Veidal, S. (author), Basta, B. (author), Iruarrizaga-Lejarreta, M. (author), van der Hoorn, J.W. (author), Verschuren, L. (author), Berbée, J.F.P. (author), Rensen, P.C.N. (author), Skjæret, T. (author), Alonso, C. (author), Feigh, M. (author), Kastelein, J.J.P. (author), Friedman, S.L. (author), Princen, H.M.G. (author), Fraser, D.A. (author)
article 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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van den Dool, T.C. (author), Kramer, L. (author), Kruidhof, R. (author), Kastelein, A. (author), Dekker, B. (author), Nieuwkoop, E. (author), Lugtenburg, J. (author)
This project is aiming to realize miniature self-contained carriers that can independently perform positioning and scanning tasks on nano-scale. Such carriers can support agents for performing tasks such as inspection, deposition, repair, and cleaning. All at the nano-scale. The carriers can make large movements in X-and Y-direction and have a...
other 2019
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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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Kastelein, R.A. (author), Helder-Hoek, L. (author), Gransier, R. (author), Terhune, J.M. (author), Jennings, N. (author), de Jong, C.A.F. (author)
Acoustic mitigation devices (AMDs) are used to deter marine mammals from construction sites to prevent hearing injury by offshore pile-driving noise. In order to quantify the distance at which AMDs designed as ‘seal scarers’ are detected by seals, the 50% hearing thresholds for playbacks of their sounds were determined. The broadband hearing...
article 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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Kastelein, R.A. (author), Hoek, L. (author), Gransier, R. (author), de Jong, C.A.F. (author), Terhune, J.M. (author), Jennings, N. (author)
Acoustic Mitigation Devices (AMDs) are used to deter marine mammals from construction sites, in order to prevent hearing injury by offshore pile driving noise. To estimate the distance at which two AMDs designed as ‘seal scarers’ (Ace Aquatec and Lofitech) are detected by harbor porpoises, the 50% hearing detection thresholds for playbacks of...
article 2015
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Moerman, F. (author), Kastelein, J. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
To satisfy consumer demand for "fresh-like" additive-free foods, many food producers nowadays apply mild processing and conservation techniques that often shorten the shelf-life of food, may put food at risk and may compromise consumer health. However, food legislation developed in many countries around the globe requires that microbiologically...
bookPart 2014
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Kastelein, R.A. (author), Hoek, L. (author), Gransier, R. (author), de Jong, C.A.F. (author)
Pile driving is presently the most common method used to attach wind turbines to the sea bed. To assess the impact of pile driving sounds on harbor porpoises, it is important to know at what distance these sounds can be detected. Using a psychophysical technique, a male porpoise’s hearing thresholds were obtained for series of five pile driving...
article 2013
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Kastelein, J. (author), van der Vossen, J.M.B.M. (author)
Kimguard One-Step sterilisation wrap has regulatory approval as a Class I medical device suitable for packaging terminally sterilised medical items. In this study, we evaluated the performance of five different grades of Kimguard One-Step sterilisation wrap after prion sterilisation cycle (134 °C for 18 minutes) using the final pack test method....
article 2013
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Kastelein, R.A. (author), Steen, N. (author), Gransier, R. (author), de Jong, C.A.F. (author)
article 2013
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Kastelein, R.A. (author), Steen, N. (author), Gransier, R. (author), Wensveen, P.J. (author), de Jong, C.A.F. (author)
Mid-frequency and low-frequency sonar systems produce frequency-modulated sweeps which may affect harbor porpoises. To study the effect of sweeps on behavioral responses (specifically startle responses, which we define as sudden changes in swimming speed and/or direction), a harbor porpoise in a large pool was exposed to three pairs of sweeps: a...
article 2012
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Kastelein, R.A. (author), Gransier, R. (author), Hoek, L. (author), de Jong, C.A.F. (author)
The distance at which harbor porpoises can hear underwater detonation sounds is unknown, but depends, among other factors, on the hearing threshold of the species for impulsive sounds. Therefore, the underwater hearing threshold of a young harbor porpoise for an impulsive sound, designed to mimic a detonation pulse, was quantified by using a...
article 2012
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Kastelein, R.A. (author), Steen, N. (author), de Jong, C.A.F. (author), Wensveen, P.J. (author), Verboom, W.C. (author)
Naval sonar systems produce signals which may affect the behavior of harbor porpoises, though their effect may be reduced by ambient noise. To show how natural ambient noise influences the effect of sonar sweeps on porpoises, a porpoise in a pool was exposed to 1-s duration up-sweeps, similar in frequency range (6-7 kHz) to those of existing...
article 2011
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Kastelein, R.A. (author), Wensveen, P.J. (author), Terhune, J.M. (author), de Jong, C.A.F. (author)
Equal-loudness functions describe relationships between the frequencies of sounds and their perceived loudness. This pilot study investigated the possibility of deriving equal-loudness contours based on the assumption that sounds of equal perceived loudness elicit equal reaction times (RTs). During a psychoacoustic underwater hearing study, the...
article 2011
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Kastelein, R.A. (author), Hoek, L. (author), de Jong, C.A.F. (author)
The distance at which active naval sonar signals can be heard by harbor porpoises depends, among other factors, on the hearing thresholds of the species for those signals. Therefore the hearing sensitivity of a harbor porpoise was determined for 1 s up-sweep and down-sweep signals, mimicking mid-frequency and low-frequency active sonar sweeps ...
article 2011
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Kastelein, R. (author), Gransier, R. (author), van Mierlo, R. (author), Hoek, L. (author), de Jong, C.A.F. (author)
To set safety criteria for levels of sounds produced during pile driving for offshore wind parks, temporary hearing threshold shifts sTTSsd were studied in a harbor porpoise and two harbor seals. A psychoacoustic behavioral technique was used to quantify TTS and hearing recovery in the animals exposed to underwater sounds swhite noise in a 1/1...
article 2011
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Kastelein, R.A. (author), Hoek, L. (author), de Jong, C.A.F. (author)
article 2011
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Kastelein, R.A. (author), Hoek, L. (author), Wensveen, P.J. (author), Terhune, J.M. (author), de Jong, C.A.F. (author), TNO Industrie en techniek (author)
The underwater hearing sensitivities of two 2-year-old female harbor seals were quantified in a pool built for acoustic research by using a behavioral psycho-acoustic technique. The animals were trained only to respond when they detected an acoustic signal (“go/no-go” response). Detection thresholds were obtained for pure tone signals ...
article 2010
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