Searched for: subject%3A%22Noise%22
(1 - 20 of 469)

Pages

document
Korevaar, C.W. (author), Boschma, J.J. (author), den Breeje, R. (author), Ebert, J. (author)
Optical feeder links (OFLs) benefit from the vast amount of bandwidth available in the THz-regime of the electro-magnetic spectrum, and could enable future terabit-per-second satellite systems. This study assesses the end-to-end performance of analog coherent OFLs for digital video broadcasting (DVB) applications, employing phase modulation (PM)...
conference paper 2022
document
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
document
Wei, X. (author), Urbach, H.P. (author), van der Walle, P. (author), Coene, W.M.J. (author)
We present a parameter retrieval method which incorporates prior knowledge about the object into ptychography. The proposed method is applied to two applications: (1) parameter retrieval of small particles from Fourier ptychographic dark field measurements; (2) parameter retrieval of a rectangular structure with realspace ptychography. The...
article 2021
document
Braat-Eggen, E. (author), Reinten, J. (author), Hornikx, M. (author), Kohlrausch, A. (author)
Students can be disturbed by background noise while working in an open-plan study environment. To improve the acoustic quality of open-plan study environments a study was done on the influence of different sound scenarios on students working on a typical student task, “studying for an exam”. Three sound scenarios and a quiet reference sound...
article 2021
document
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
document
Weemstra, C. (author), de Laat, J.I. (author), Verdel, A. (author), Smets, P. (author)
Instrumental timing and phase errors are a notorious problem in seismic data acquisition and processing. These can be frequency independent, for example due to clock drift, but may also be frequency dependent, for example due to imperfectly known instrument responses. A technique is presented that allows both types of errors to be recovered in a...
article 2021
document
Isojunno, S. (author), von Benda-Beckmann, A.M. (author), Wensveen, P.J. (author), Kvadsheim. P.H., (author), Frans-Peter A. Lam, (author), Gkikopoulou, K.C. (author), Pöyhönen, V. (author), Tyack, P.L. (author), Benti, B. (author), Foskolos, I. (author), Bort, J. (author), Miguel Neves, M. (author), Biassoni, N. (author), Miller, P.J.O. (author)
Auditory masking by anthropogenic noise may impact marine mammals relying on sound for important life functions, including echolocation. Animals have evolved antimasking strategies, but they may not be completely effective or cost-free. We formulated seven a priori hypotheses on how odontocete echolocation behavior could indicate masking. We...
article 2021
document
Bottenheft, C. (author), Brouwer, A.M. (author), Stuldreher, I. (author), Groen, E. (author), van Erp, J. (author)
Effects of stressors on cognitive task performance have primarily been studied in isolation, and little is known about the combined effects of two or more stressors. This study examined how a metabolic stressor (skipping breakfast) and a sensory stressor (noise) affect cognitive task performance in isolation and combined. In addition to...
article 2021
document
H. Hildmann, , (author), Eledlebi, K. (author), Saffre, F. (author), Isakovic, A.F. (author)
This chapter reports on a family of nature-inspired algorithms that were successfully used to deploy a drone-based wireless sensor network into (simulated) indoor environments. The algorithms are designed to work in a decentralised manner, with each drone operating autonomously, using only local (subjective) information about a drone’s own...
conference paper 2021
document
de Martin, L. (author), van Rossum, W. (author), Ribeiro, D. (author), Anitori, L. (author)
It is well known that noise-like waveforms have the inherent property of suppressing ambiguities due to their nonrepetitive nature, as opposed to the more classical linear frequency modulated (LFM) pulsed waveforms. This aperiodicity also improves the robustness against jammers, making these waveforms harder to detect and classify by an enemy....
article 2020
document
Isojunno, S. (author), Wensveen, P.J. (author), Lam, F.P.A. (author), Kvadsheim, P.H. (author), von Benda-Beckmann, A.M. (author), Lopez, L.M. Martín (author), Kleivane, L. (author), Siegal, E.M. (author), Miller, P.J.O. (author)
Anthropogenic noise sources range from intermittent to continuous, with seismic and navy sonar technology moving towards nearcontinuous transmissions. Continuous active sonar (CAS) may be used at a lower amplitude than traditional pulsed active sonar (PAS), but potentially with greater cumulative sound energy. We conducted at-sea experiments to...
article 2020
document
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
document
Müller, R.A.J. (author), von Benda-Beckmann, A.M. (author), Halvorsen, M.B. (author), Ainslie, M.A. (author)
Regulations for underwater anthropogenic noise are typically formulated in terms of peak sound pressure, root-mean-square sound pressure, and (weighted or unweighted) sound exposure. Sound effect studies on humans and other terrestrial mammals suggest that in addition to these metrics, the impulsiveness of sound (often quantified by its kurtosis...
article 2020
document
Tajdari, F. (author), Berkhoff, A.P. (author), de Boer, A. (author)
This paper focuses on extensive numerical and experimental investigations of a thin sandwich acoustic source. Due to an energy inefficient actuation design, a thin sandwich acoustic source that was proposed in an early study is redesigned and reconstructed in the current research. The thin acoustic source in the present paper is actuated by long...
article 2020
document
Tajdari, F. (author), Berkhoff, A.P. (author), van der Zee, R.A.R. (author), de Boer, A. (author)
article 2020
document
Tajdari, F. (author), Berkhoff, A.P. (author), de Boer, A. (author)
This paper studies an acoustic source with a relatively small thickness and a high bending stiffness. The acoustic source operates in the low frequency, quasi-static regime. The focus of the current study is on the actuation part in order to design an appropriate excitation mechanism. A flexural mechanism is modeled in combination with a...
article 2020
document
Eledlebi, K. (author), Ruta, D. (author), Hildmann, H. (author), Saffre, F. (author), Alhammadi, Y. (author), Isakovic, A. (author)
When deploying a wireless sensor network (WSN) identifying optimal locations for the nodes is challenging, especially so if the environment is either (i) unknown or (ii) obstacle-rich. We proposes BISON (Bio-Inspired Self- Organizing Network), a variant of the Voronoi algorithm to address this challenge. Among the features of the approach are...
article 2020
document
Berkhoff, A. (author)
conference paper 2020
document
Lodari, M. (author), Hendrickx, N.W. (author), Lawrie, W.I.L. (author), Hsiao, T.K. (author), Vandersypen, L.M.K. (author), Sammak, A. (author), Veldhorst, M. (author), Scappucci, G. (author)
conference paper 2020
document
Mueller, W. (author), Steinle, S. (author), Pärkkä, J. (author), Parmes, E. (author), Liedes, H. (author), Kuijpers, E. (author), Pronk, A. (author), Sarigiannis, D. (author), Karakitsios, S. (author), Chapizanis, D. (author), Maggos, T. (author), Stamatelopoulou, A. (author), Wilkinson, P. (author), Milner, J. (author), Vardoulakis, S. (author), Loh, M. (author)
Background/Aim: The exposome includes urban greenspace, which may affect health via a complex set of pathways, including reducing exposure to particulate matter (PM) and noise. We assessed these pathways using indoor exposure monitoring data from the HEALS study in four European urban areas (Edinburgh, UK; Utrecht, Netherlands; Athens and...
article 2020
Searched for: subject%3A%22Noise%22
(1 - 20 of 469)

Pages