Searched for: author:"de Roo, F."
(1 - 20 of 33)

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de Roo, F. (author), van Eeden, M. (author), Dittrich, M.G. (author), van Blokland, G. (author)
In het eerste deel van deze artikelenreeks* is besproken welke normalisatie-organisaties in Nederland en internationaal actief zijn op het gebied van akoestiek en geluid, hoe zij samenwerken en welke uitgangspunten worden gehanteerd bij het standaardiseren van reken-, meet- en testmethoden. Dit tweede deel behandelt hoe de normalisatie is...
article 2021
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de Roo, F. (author), van Eeden, M. (author), Dittrich, M.G. (author), van Blokland, G. (author)
Er bestaat een breed netwerk van (internationale) normalisatie werkgroepen op het gebied van akoestiek en geluid. Waar zijn ze zoal mee bezig en vooral, wat voor bijdrage leveren ze aan het reguleren van omgevingsgeluid
article 2020
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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), 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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de Roo, F. (author), van Beek, J.G. (author)
Before the end of 2013, the responsible institutions of the European Union will probably decide on a proposal for a new “Regulation on the sound level of motor vehicles.” It will specify a new type approval test method for noise emission and will give revised limit values for the permissible noise emission per vehicle (sub-)category. The new...
article 2014
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van Zyl, P.S. (author), de Roo, F. (author), Jansen, S.T.H. (author), de Graaf, E. (author)
report 2014
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de Roo, F. (author)
The sound reflectivity of noise barriers elements is one of the major acoustic product characteristics. Traditionally this property was tested in reverberation rooms according to EN 1793-1 and the results were used to predict the effect of sound reflections in the far field. As in many cases these results cannot be used directly to assess the...
conference paper 2013
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Dittrich, M.G. (author), de Roo, F. (author)
Noise emission of new road vehicles is regulated by European Directives [1] and subsequent amendments. Proposals for tighter noise emission limits for road vehicles made by the European Commission in 2011 [2] have been adopted in modified form by the European Parliament in 2013 [3]. In the VENOLIVA study on the effects of new vehicle noise...
conference paper 2013
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de Roo, F. (author)
In 2013 or early 2014 the European Union will decide upon a new “Regulation on the sound level of motor vehicles”. It will specify a new type approval test method for noise emission and will give revised limit values for the permissible noise emission per vehicle (sub- category. The new regulation may be seen as a final stage of a long series of...
conference paper 2013
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Derksen, G.B. (author), de Roo, F. (author)
One of the methods to determine the influence of the road surfaces characteristics on the emission of noise by road traffic is the so-called Close Proximity (CPX) method, which measures the noise emission of the tyre-road contact in the near field of a sound radiating tyre. These measurements are executed with CPX measurement trailers....
report 2012
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Derksen, G.B. (author), de Roo, F. (author)
In de Nederlandse praktijk van het meten van de geluidsreductie van wegdekken met behulp van de CPX-methode [1] is gebleken dat er tussen de resultaten van verschillende uitvoerders van deze methode relatief grote verschillen bestaan die voor opdrachtgevers leiden tot vragen en onduidelijkheden over de akoestische kwaliteit van de gemeten...
report 2012
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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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de Roo, F. (author), Lutgendorf, D. (author), Wessels, P.W. (author), Nederlandse Organisatie voor Toegepast-Natuurwetenschappelijk Onderzoek (author)
Sound reflectivity is one of the intrinsic acoustical characteristics of noise reducing devices (NRD’s). It describes which percentage of an incident sound field is reflected back towards the opposite side of the road. The reflectivity is determined by the absorption properties of the material of the NRD as well as by the geometrical shape of...
report 2012
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Lutgendorf, D. (author), Wessels, P.W. (author), van den Eerden, F.J.M. (author), de Roo, F. (author)
Within the EU FP7 QUIESST project, QUIeting the Environment for a Sustainable Surface Transport, a test method is being developed for the reflectivity of noise barriers. The method needs to account for a complex shape of barriers and the use of various types of absorbing materials. The performance of a barrier is to be measured in the near field...
conference paper 2012
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Clairbois, J.-P. (author), de Roo, F. (author), Garai, M. (author), Conter, M. (author), Defrance, J. (author), Oltean-Dumbrava, C. (author), Fusco, I. (author)
The research QUIESST (QUIetening the Environment of Sustainable Surface Transport) started in November 2010 for 36 months: it targets a better knowledge about the noise barriers performances, either their intrinsic (product) or their extrinsic performances (works, environment, population). QUIESST objectives and work schedule have been presented...
conference paper 2012
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Derksen, G.B. (author), de Roo, F. (author)
The Dutch practice of assessment of the noise reducing properties of pavements according to the CPX (Close Proximity) Method has revealed that relatively large differences may occur between test results produced by different CPX operators. Due to these differences road authorities are facing questions and uncertainties about the acoustical...
report 2012
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Lutgendorf, D. (author), de Roo, F. (author), Wessels, P.W. (author), Nederlandse Organisatie voor Toegepast-Natuurwetenschappelijk Onderzoek (author)
Sound reflectivity is one of the intrinsic acoustical characteristics of noise barriers. It describes which percentage of an incident sound field is reflected back towards the opposite side of the road. The reflectivity is determined by the absorption properties of the material of the barrier as well as by the geometrical shape of the barrier,...
report 2012
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van Beek, P.J.G. (author), de Roo, F. (author), Dittrich, M.G. (author)
In the EU Green Paper on Future Noise Policy of 1996 it was already concluded that the total effect of EU and Member States legislation on environmental road traffic noise was unsatisfactory until then. This was underpinned by extensive studies in the late nineties in the Netherlands, Germany and other countries. A very recent study in the...
conference paper 2011
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de Roo, F. (author), Dittrich, M.G. (author), van Beek, P.J.G. (author), Bosschaert, C. (author), Derksen, G.B. (author), de Kievit, M. (author)
conference paper 2011
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Lutgendorf, D. (author), de Roo, F. (author), van der Eerden, F.J.M. (author), Jean, P. (author), Ecotière, D. (author), Dutilleux, G. (author)
This paper deals with the first stages of the development of a new test method for evaluating the reflectivity performance of noise barriers. The reflectivity performance describes the increase in sound level at a receiver due to the presence of the noise barrier. First the current test method for sound reflectivity is simulated with three...
conference paper 2011
Searched for: author:"de Roo, F."
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