Searched for: subject%3A%22AS%255C%2B%255C-%255C%2BAcoustics%255C%2B%2526%255C%2BSonar%22
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Dittrich, M.G. (author), Sliggers, C.J. (author)
Wegverkeer en machines buiten zijn belangrijke bronnen van geluid-hinder en slaapverstoring. Wat is de stand van zaken en wat draagt Nederland bij aan de aanscherping van Europese limieten?
article 2017
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van Neer, P.L.M.J. (author), Piras, D. (author), Koek, W. (author), van Zwet, E. (author), Marnani, H.S. (author)
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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Binnerts, B. (author), Blom, K.C.H. (author), Giodini, S. (author)
Acoustic underwater communication is an enabler for the use of autonomous underwater vehicles (AUVs). AUVs can operate in acoustically challenging environments, e.g., near offshore platforms and in harbours. To realize robust underwater communication in such environments, the propagation conditions need to be properly understood. In this paper,...
conference paper 2017
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Noack, B. (author), Sijs, J. (author), Hanebeck, U.D. (author)
Decentralized data fusion is a challenging task. Either it is too difficult to maintain and track the information required to perform fusion optimally, or too much information is discarded to obtain informative fusion results. A well-known solution is Covariance Intersection, which may provide too conservative fusion results. A less conservative...
conference paper 2017
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Synnes, S.A.V. (author), Hunter, A.J. (author), Hansen, R.E. (author), Sabo, T.O. (author), Callow, H.J. (author), van Vossen, R. (author), Austeng, A. (author)
Wideband and widebeam synthetic aperture sonar (SAS) can provide information on the frequency- and aspect dependent scattering in a scene. We suggest an approach to predict the quality of the sensor data over the available frequencies and aspect angles. We relate the typical spatial domain quality metrics to their wave number domain (WD)...
article 2017
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Liu, Z. (author), Htein, L. (author), Cheng, L.K. (author), Martina, Q.E.V.N. (author), Jansen, T.H. (author), Tam, H.Y. (author)
In this paper, we present a miniature fluidic flowmeter based on a packaged FBG and laser-heated fibers. The flow rates of water and hydraulic oil were measured by utilizing the proposed flowmeter. The measured results exhibited good sensitivity of 0.339 nm/(m/s) for water and 0.578 nm/(m/s) for oil flow. Experimental results showed that the...
conference paper 2017
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Ainslie, M.A. (author), Ellis, D.D. (author)
article 2017
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Tuma, M. (author), Rorbech, V. (author), Prior, M. (author), Igel, C. (author)
We designed and jointly optimized an integrated signal processing chain for detection and classification of long-range passive-acoustic underwater signals recorded by the global geophysical monitoring network of the Comprehensive Nuclear-Test-Ban Treaty Organization. Starting at the level of raw waveform data, a processing chain of signal...
article 2016
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von Benda-Beckmann, A.M. (author), Wensveen, P.J. (author), Kvadsheim, P.H. (author), Lam, F.P.A. (author), Miller, P.J.O. (author), Tyack, P.L. (author), Ainslie, M.A. (author)
Ramp-up procedures are used to mitigate the impact of sound on marine mammals. Sound exposure models combined with observations of marine mammals responding to sound can be used to assess the effectiveness of ramp-up procedures. We found that ramp-up procedures before full-level sonar operations can reduce the risk of hearing threshold shifts...
bookPart 2016
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Wessels, P.W. (author), Basten, T.G.H. (author)
An increase in public awareness of noise pollution and the impact of noise on human health has led to the need for enhanced insight in complex noise situations. This insight is commonly obtained either by brief measurements or by evaluation of a simplified acoustic model. Both of these approaches however have limitations in complex noise...
article 2016
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Dittrich, M.G. (author)
De overheid wil negatieve effecten van verkeersgeluid in Nederland aanpakken vanuit een brede visie gericht op de periode tot 2050. Daarvoor is inzicht nodig in de effecten van ontwikkelingen in die periode in beleid, mobiliteit en technologie. TNO heeft een verkennende studie uitgevoerd en daarna een beleidsindicator ontwikkeld waarmee deze...
article 2016
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Volker, A.W.F. (author), van Neer, P.L.M.J. (author)
A sufficiently high spatial sampling is critical for high quality imaging. If the sampling criterion is not met, artifacts appear in the image generally referred to as grating lobes. Probes with a large aperture provide a large field of view, which allows for more efficient inspection. On the other hand this leads to an increase in the number of...
conference paper 2016
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Dol, H. (author), Blom, K. (author), van der Spek, E. (author)
conference paper 2016
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Giodini, S. (author), Binnerts, B. (author)
conference paper 2016
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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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Isojunno, S. (author), Curé, C. (author), Helgevold Kvadsheim, P. (author), Lam, F.P.A. (author), Tyack, P.L. (author), Wensveen, P.J. (author), Miller, P.J.O (author)
Abstract . The time and energetic costs of behavioral responses to incidental and experimental sonar exposures, as well as control stimuli, were quantifi ed using hidden state analysis of time series of acoustic and movement data recorded by tags ( DTAG ) attached to 12 sperm whales ( Physeter macrocephalus ) using suction cups. Behavioral state...
article 2016
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Sivle, L.D. (author), Wensveen, P.J. (author), Kvadsheim, P.H. (author), Lam, F.P.A. (author), Visser, F. (author), Curé, C. (author), Harris, C.M. (author), Tyack, P.L. (author), Miller, P.J.O. (author)
Modern long-range naval sonars are a potential disturbance for marine mammals and can cause disruption of feeding in cetaceans. We examined the lunge-feeding behaviour of humpback whales Megaptera novaeangliae before, during and after controlled exposure experiments with naval sonar by use of acoustic and motion sensor archival tags attached to...
article 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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von Benda-Beckmann, A.M. (author), Wensveen, P.J. (author), Samarra, F.I.P. (author), Beerens, S.P. (author), Miller, P.J.O. (author)
Sound-recording acoustic tags attached to marine animals are commonly used in behavioural studies. Measuring ambient noise is of interest to efforts to understand responses of marine mammals to anthropogenic underwater sound, or to assess their communication space. Noise of water flowing around the tag reflects the speed of the animal, but...
article 2016
Searched for: subject%3A%22AS%255C%2B%255C-%255C%2BAcoustics%255C%2B%2526%255C%2BSonar%22
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