Searched for: subject%3A%22Acoustic%255C%2Bvariables%255C%2Bcontrol%22
(1 - 20 of 45)
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van der Eerden, F. (author), van den Berg, F. (author), van Heijningen, A. (author)Noise contours around military training areas are calculated by using: a) the measured source strength for the impulsive sources and b) the calculated sound propagation using a representative set of meteorological situations. For high-energy impulsive sounds the source strength is measured at distances beyond 100 meters, where peak levels are...conference paper 2022
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- Berkhoff, A. (author) conference paper 2020
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Brouns, E. (author), van der Eerden, F. (author), Eisses, A.R. (author), Kruyen, A.H.J. (author), van Vliet, W. (author)A series of resonators alongside a road or railway can be used to diffract noise upwards to create a zone of noise reduction behind the elements. The company 4Silence developed the so-called Whisstone, a concrete block with 18 resonators of different depths designed to operate in a broad frequency range. Several measurements at short distance,...conference paper 2018
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van der Eerden, F.J.M. (author), van den Berg, F.H.A. (author), Wessels, P.W. (author), Kruyen, A.H.J. (author)The use of combining sound measurements and sound propagation modelling is increasing. In this paper the acoustic situation on and around a shooting range is considered. A monitoring system that automatically detects and localizes impulsive sound events is presented. The locations of these events are obtained by combining detections from...conference paper 2018
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van der Eerden, F.J.M. (author), Wessels, P.W. (author), Basten, T.G.H. (author), Botteldooren, D. (author), van Rentherghem, T. (author), de Coensel, B. (author)A long-term monitoring project, with 12 months of continuous operation time, is described where the sound sources within a large industrial area as well as the sound levels in the nearby residential area are measured. The sources in the industrial area may give rise to complaints from the neighboring residential areas, at several kilometers...conference paper 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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Tajdari, F. (author), Berkhoff, A.P. (author), de Boer, A. (author)This paper studies a lumped model of an acoustic source with a relatively small thickness and high bending stiffness. Voice coil and piezoelectric actuators are used to drive moving components of the acoustic source. Feedback and feedforward damping control techniques are used to actively obtain a smooth frequency response, especially at low...conference paper 2017
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Botteldooren, D. (author), van Renterghem, T. (author), van der Eerden, F.J.M. (author), Wessels, P.W. (author), Basten, T.G.H. (author), de Coensel, B. (author)Source localization using microphone arrays has now become common practice for many applications. Their application for long term monitoring of industrial noise nevertheless remains uncommon. Hence, in 2016 we deployed four microphone arrays near a large industrial area for a period of 12 months and explored the challenges involved. The...conference paper 2017
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- Botteldooren, D. (author), van Renterghem, T. (author), de Coensel, B. (author), Dekoninck, L. (author), Spruytte, V. (author), Makovec, A. (author), van der Eerden, F. (author), Wessels, P. (author), Basten, T. (author) conference paper 2016
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- Berkhoff, A.P. (author), Meijer, H.J. (author), van Ophem, S. (author) conference paper 2016
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van Ophem, S. (author), Berkhoff, A.P. (author)Summary For broadband active noise control applications with a rapidly changing primary path, it is desirable to find algorithms with a rapid convergence, a fast tracking performance, and a low computational cost. Recently, a promising algorithm has been presented, called the fast-array Kalman filter, which uses rotation matrices to calculate...article 2016
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van der Eerden, F. (author), Wessels, P. (author), Segers, A. (author), Basten, T. (author), de Coensel, B. (author), Botteldooren, D. (author), Van Renterghem, T. (author), Dekoninck, L. (author), Spruytte, V. (author), Makovec, A. (author)The distance between noise sources at a large industrial area and a local community can be in the order of several kilometers. At such distances it may not be clear which sources are the main contributors to possible noise complaints. A long-term monitoring project is described that measures the sound sources in the industrial area and the sound...conference paper 2016
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- Jansen, E. (author), De Jong, C. (author) conference paper 2016
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- Berkhoff, A.P. (author), Meijer, H.J. (author), van Ophem, S. (author) conference paper 2016
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Salomons, E.M. (author), Zhou, H. (author), Lohman, W.J.A. (author)Traffic noise mapping of cities requires large computer calculation times. This originates from the large number of point-to-point sound propagation calculations that must be performed. In this article it is demonstrated that noise mapping calculation times can be reduced considerably by the use of parallel computation on the Graphics Processing...conference paper 2014
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White, K. (author), Arntzen, M. (author), Bronkhorst, A. (author), Meeter, M. (author)Annoyance reactions to different types of landing procedures were addressed in a controlled laboratory setting using a Virtual Community Noise Simulator (VCNS) with a head mounted display.Participants, standing on a virtual countryside road, experienced four types of descentflyovers by an A330 aircraft: A regular descent flyoverat 2000ft and...conference paper 2014
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Nijhof, M.J.J. (author), Binnerts, B. (author), de Jong, C.A.F. (author), Ainslie, M.A. (author)Modelling the sound levels in the water column due to pile driving operations nearby and out to large distances from the pile is crucial in assessing the likely impact on marine life. Standard numerical techniques for modelling the sound radiation from mechanical structures such as the finite element (FE) and boundary element method are not well...conference paper 2014
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van der Eerden, F. (author), Graafland, F. (author), Wessels, P. (author), Segers, A. (author), Salomons, E. (author)Noise control for an urban district starts by understanding the actual noise situation. A correct understanding is needed to take appropriate and cost efficient measures. For a noise burdened urban district, surrounded by road and rail traffic, the traffic noise as well as the annoyance has been measured. The size of the district is...conference paper 2014
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de Kluizenaar, Y. (author), Gidlöf-Gunnarsson, A. (author), Botteldooren, D. (author), Bockstael, A. (author), Janssen, S.A. (author), Vos, H. (author), van den Berg, F. (author), Salomons, E.M. (author)In urban areas, road traffrc noise is a dominant source of environmental noise and a major cause of noise annoyance and disturbed sleep. It has been hypothesized that respondents highly exposed to noise at multiple sides of their dwelling, may be expected to be worse off than respondents with the same exposure at the most exposed side, but also...conference paper 2013
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Berkhoff, A. (author), van Ophem, S. (author)The feed-forward broadband active noise control problem can be formulated as a state estimation problem to achieve a faster rate of convergence than the filtered reference least mean squares algorithm and possibly also a better tracking performance. A multiple input/multiple output Kalman algorithm is used to perform this state estimation. To...conference paper 2013
Searched for: subject%3A%22Acoustic%255C%2Bvariables%255C%2Bcontrol%22
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