Searched for: subject%3A%22Noise%255C%2Breduction%22
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Toet, A. (author)
Edge preserving filters aim to simplify the representation of images (e.g., by reducing
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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Sliggers, J. (author), Dittrich, M.G. (author)
Geleuidhinder is na luchtverontreiniging het grootste milieuprobleem voor de volksgezonheid. De meeste hinder wordt veroorzaakt door het wegverkeer. Maar liefst 3 miljoen mensen in Nederland zijn gehinderd of slaap gestoord. Ernstig gehinderd of slaapgestoord zijn bijna 1,5 miljoen mensen. Verlaging van de bron-niveaus van de voertuigen en...
article 2015
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Dittrich, M.G. (author), de Roo, F. (author), van Zyl, P.S. (author), Jansen, S.T.H. (author), de Graaff, E. (author)
Tyre-road noise is still a major and growing issue in Europe. A recent study performed in The Netherlands for the Dutch Ministry of Infrastructure and Environment examined the benefits of widescale introduction of high quality labeled tyres, with ‘Triple A’ rating for rolling resistance, wet grip and noise. Two scenarios were investigated, one...
conference paper 2015
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Dittrich, M.G. (author), Bosshaart, C. (author), Wessels, P.W. (author)
As part of a recent renovation of the Erasmus bridge in Rotterdam, improvements were made to reduce impact noise caused by trams passing a series of rai! joints. The bridge inciudes several different sections inciuding a bascule bridge and is in an inner city tocation with new adjacent apartment buildings. At request of public transport company...
conference paper 2015
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Dittrich, M.G. (author), de Roo, F. (author), Eisses, R.R. (author)
An exploratory study bas been undertaken to put into perspective future impact of road and railway noise until 2050 in The Netherlands, taking into account potential economic and mobitity growth, noise policy and legislation, demography and technical progress. Estimates were made of average noise levels and numbers of annoyed and sleep disturbed...
conference paper 2015
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Dittrich, M.G. (author), Graafland, F. (author), Eisses, A.R. (author), Nijhof, M.J.J. (author)
Rail dampers and sound absorbing plates have been tested on a high speed railway slab track in a walled cutting at a noise sensitive location. Their noise reduction has been determined from pass-by measurements during service and predicted using BEM calculations. The cutting depth, noise barrier height and configuration vary along the length of...
conference paper 2015
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Ho, J.H. (author), Berkhoff, A.P. (author)
This paper compares various decentralised control strategies, including structural and acoustic actuator-sensor configuration designs, to reduce noise transmission through a double panel structure. The comparison is based on identical control stability indexes. The double panel structure consists of two panels with air in between and offers the...
article 2014
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Salomons, E.M. (author), Janssen, S.A. (author), Verhagen, H.L.M. (author)
article 2014
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Dijk, J. (author), van Eekeren, A.W.M. (author), Toet, A. (author), den Hollander, R.J.M. (author), Schutte, K. (author), van Heijningen, A.W.P. (author), Bijl, P. (author)
For many military operations, situational awareness is of great importance. During night conditions, this situational awareness can be improved using both analog and digital image-intensified cameras. The quality of image intensifiers is a topic of interest. One of the differences between a digital and analog system is noise behavior. For...
article 2013
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Schwering, P.B.W. (author), Kemp, R.A.W. (author), Schutte, K. (author)
Recognition and identification ranges are limited to the quality of the images. Both the received contrast and the spatial resolution determine if objects are recognizable. Several aspects affect the image quality. First of all the sensor itself. The image quality depends on the size of the infrared detector array and the sensitivity. Second,...
conference paper 2013
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Clairbois, J.P. (author), de Roo, F. (author), Garai, M. (author), Conter, M. (author), Defrance, J. (author), Oltean-Dumbrava, C.A. (author), Durso, C. (author)
The aim of this guidebook is to become a reference tool for noise mitigation through a better use of Noise Reducing Devices (NRD) (e.g.: Noise Barriers or sound Absorptive Claddings). It targets all the stakeholders involved in NRD projects (designers, manufacturers, authorities, construction companies, maintenance companies...) and who are...
report 2012
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TNO Defensie en Veiligheid (author), Schutte, K. (author), Schwering, P.B.W. (author)
The current state of the art in electro-optics provides systems with high image quality for associated prices and less expensive systems with subsequent lower performance. This keynote will expound how image processing enables to obtain high quality imagery while utilizing affordable system components. Furthermore, where conventional high-end EO...
conference paper 2010
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TNO Defensie en Veiligheid (author), Toet, A. (author), Hogervorst, M.A. (author)
We present the design and first test results of the TRICLOBS (TRI-band Color Low-light OBServation) system The TRICLOBS is an all-day all-weather surveillance and navigation tool. Its sensor suite consists of two digital image intensifiers (Photonis ICU's) and an uncooled longwave infrared microbolometer (XenICS Gobi 384). The night vision...
conference paper 2009
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Vogel, I. (author), Brug, J. (author), van der Ploeg, C.P.B. (author), Raat, H. (author)
Noise-induced hearing loss is a significant social and public health problem, which is found in increasing numbers of adolescents. Young people are particularly likely to expose themselves to potentially damaging loud sounds during leisure activities. Visiting discotheques is one of the most popular leisure activities of young people. Only a few...
article 2009
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Wesselink, J.M. (author), Berkhoff, A.P. (author), TNO Industrie en Techniek (author)
In this paper, real-time results are given for broadband multichannel active noise control using the regularized modified filtered-error algorithm. As compared to the standard filtered-error algorithm, the improved convergence rate and stability of the algorithm are obtained by using an inner-outer factorization of the transfer path between the...
article 2008
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TNO Defensie en Veiligheid (author), Dijk, J. (author), den Hollander, R.J.M. (author)
Recently new techniques for night vision cameras are developed. So-called EMCCD cameras are able to record color information about the scene. However, in low-light situations this imagery becomes noisy. This is also the case for normal CCD cameras in dark situations or in shadowed areas. In this paper we present image enhancement techniques for...
conference paper 2008
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Crabtree, B. (author), Abel, S. (author), Dancer, A.L. (author), Buck, K. (author), Wessling, T. (author), Steeneker, H.J.M. (author), Verhave, J. (author), James, S.H. (author), Rood, G. (author), McKinley, R. (author)
Hearing protection with standard passive earmuffs is for many military applications insufficient. Low frequency noises (diesel engines, helicopter rotor) require increased attenuation. Active Noise Reduction (ANR) is specifically suited for reduction at low frequencies. Assessment of ANR for military applications is an important topic as the...
report 2004
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TNO Technische Menskunde (author), Steeneken, H.J.M. (author), Verhave, J.A. (author)
Active noise reduction is a successful addition to passive ear-defenders for improvement of the sound attenuation at low frequencies. Design and assessment methods are discussed, focused on subjective and objective attenuation measurements, stability, and high noise level applications. Active noise reduction systems are suitable for integration...
article 2004
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TNO Fysisch en Elektronisch Laboratorium (author), Schutte, K. (author), de Lange, D.J. (author), van den Broek, S.P. (author)
In tactical sensor imagery there always is a need for less noise, higher dynamic range and more resolution. Although recent developments lead to better and better Focal Plane Array (FPA) camera systems, modern infrared FPA camera system are still hindered by non-uniformities, a limited signal-to-noise ratio and a limited spatial resolution. The...
conference paper 2003
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