Searched for: subject:"Noise%5C+abatement"
(1 - 15 of 15)
document
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
document
White, K. (author), Arntzen, M. (author), Walker, F. (author), Waiyaki, F.M. (author), Meeter, M. (author), Bronkhorst, A.W. (author)
During Continuous Descent Approaches (CDAs) aircraft glide towards the runway resulting in reduced noise and fuel usage. Here, we investigated whether such landings cause less noise annoyance than a regular stepwise approach. Both landing types were compared in a controlled laboratory setting with a Virtual Community Noise Simulator (VCNS),...
article 2017
document
Jansen, H.W. (author), Dittrich, M.G. (author), Squicciarini, G. (author), Thompson, D.J. (author), Betgen, B. (author)
New railway vehicles in Europe have to comply with noise limits as defined in the Technical Specification for Interoperability (TSI). The pass-by test has to be carried out at a site that fulfills the TSI requirements. The need has arisen to be able to perform TSI pass-by type testing at non-compliant sites. In the ACOUTRAIN project, procedures...
bookPart 2015
document
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
document
Jansen, H.W. (author), Dittrich, M.G. (author), Squicciarini, S. (author), Thompson, D.J. (author), Betgen, B. (author)
New railway vehicles in Europe have to comply with noise limits as defined in the Technical Specification for Interoperability (TSI). The pass-by test has to be carried out at a site that fulfills with TSI requirements. The need has arisen to be able to perform TSI pass-by type testing at non-compliant sites. In the ACOUTRAIN project, procedures...
conference paper 2013
document
van der Eerden, F.J.M. (author), Salomons, E.M. (author), Beeks, A.A.F.M. (author), TNO Industrie en Techniek (author)
With the extra runway at Amsterdam Schiphol Airport, introduced in 2003, the noise nuisance for local residents increased due to increased groundnoise. In a case study the effect of enhanced ground absorption on the propagation of low-frequency noise from aircraft ground operations, e.g. departing aircraft, has been investigated. The study was...
conference paper 2007
document
Shatto, D.P. (author), Belfroid, S.P.C. (author), Peters, M.C.A.M. (author), TNO Industrie en Techniek (author)
Corrugated tubes can produce a tonal noise when used for gas transport, for instance in the case of flexible risers. The whistling sound is generated by shear layer instability due to the boundary layer separation at each corrugation. This whistling is examined by investigating the frequency, amplitude and onset of the pulsations generated by 2"...
conference paper 2007
document
Borst, H.C. (author), Miedema, H.M.E. (author), TNO Bouw en Ondergrond (author)
In this paper, the following four indicators describing noise annoyance in a community are considered: the percentage of people being highly annoyed (pHA), annoyed (pA), (at least) little annoyed (p LA), and the mean of the expected individual annoyance scores (m EA) in the population concerned. These indicators are calculated for a study...
article 2005
document
Verlaan, A.L. (author), van den Dool, T.C. (author), Braam, B.C. (author), Calvel, B. (author), Sesselman, R. (author), Pöschel, W. (author), Dontsov, D. (author), Vega, I.C. (author), Manske, E. (author), Schuldt, T. (author), Sodnik, Z. (author), Technisch Physische Dienst TNO - TH (author)
A Darwin precursor breadboard, comprising both fine lateral and longitudinal metrology sensors was designed, built and partially tested. The lateral metrology sensor was designed and built by TNO TPD and more than meets the imposed requirements. The longitudinal metrology sensor consists of a dual wavelength interferometer with an integrated...
conference paper 2004
document
Vos, J. (author), TNO Technische Menskunde (author)
In a laboratory study, the annoyance caused by the passby sounds from a magnetic levitation (maglev) train was investigated. The listeners were presented with various sound fragments. The task of the listeners was to respond after each presentation to the question: "How annoying would you find the sound in the preceding period if you were...
article 2004
document
Steeneken, H.J.M. (author), Verhave, J.A. (author), TNO Technische Menskunde (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
document
TNO Fysisch en Elektronisch Laboratorium (author), van Vliet, F.E. (author), de Boer, A. (author)
This paper discusses the final result of development effort leading to a fully-integrated phased-array core chip. The MMIC is especially useful for active electronically-steered arrays, and integrates a full functionality including low-noise amplifier (LNA), a medium-power amplifier (MPA) matched to common high-power amplifiers (HPA) and all...
conference paper 2004
document
Vos, J. (author), TNO Technische Menskunde (author)
In a previous study on the annoyance caused by a great variety of shooting sounds [J. Acoust. Soc. Am. 109, 244-253 (2001)], it was shown that the annoyance, as rated indoors with the windows closed, could be adequately predicted from the outdoor A-weighted and C-weighted sound-exposure levels [ASEL (L(AE)) and CSEL (L(CE))] of the impulse...
article 2003
document
Thompson, D.J. (author), Verheij, J.W. (author), Technisch Physische Dienst TNO - TH (author)
The stiffness and damping of rail fasteners, and in particular the elastomeric pads inserted between the rail and sleeper, are important parameters determining the dynamic behaviour of railway track. For noise predictions, the frequency range from about 100 Hz up to 5000 Hz is important. Laboratory measurements are described in which the...
article 1997
document
Thompson, D.J. (author), Technisch Physische Dienst TNO - TH (author)
article 1996
Searched for: subject:"Noise%5C+abatement"
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