Searched for: subject%3A%22Acoustic%255C%2Bvariables%255C%2Bcontrol%22
(21 - 40 of 45)
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Janssen, S.A. (author), Salomons, E.M. (author), Vos, H. (author), de Kluizenaar, Y. (author)Environmental noise annoyance due to transportation noise in the home environment has been widely studied, and exposure-response relationships have been established previously for the expected percentage of annoyed residents with the most exposed façade exposure level as a determinant. However, relatively little is known about the evaluation of...conference paper 2013
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Janssen, S.A. (author), Vos, H. (author), Koopman, A. (author)The EU-project CargoVibes aims to describe the expected annoyance due to vibration among residents living near (freight) railway lines. Compared to the state of knowledge on the annoyance response to noise, relatively little is known about the relationship between vibration exposure and annoyance. Existing evaluation criteria in use are not...conference paper 2013
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Matova, S.P. (author), Elfrink, R. (author), Vullers, R.J.M. (author), van Schaijk, R. (author)In this paper we report an airflow energy harvester that combines a piezoelectric energy harvester with a Helmholtz resonator. The resonator converts airflow energy to air oscillations which in turn are converted into electrical energy by a piezoelectric harvester. Two Helmholtz resonators with adjustable resonance frequencies have been designed...article 2011
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Berkhoff, A.P. (author)Applications are given of a preconditioned adaptive algorithm for broadband multichannel active noise control. Based on state-space descriptions of the relevant transfer functions, the algorithm uses the inverse of the minimum-phase part of the secondary path in order to improve the speed of convergence. A further improvement of the convergence...conference paper 2010
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Janssen, S.A. (author), Vos, H. (author), Eisses, A.R. (author), Pedersen, E. (author), TNO Bouw en Ondergrond (author)There are indications that, given a certain level of noise exposure, the expected annoyance by wind turbine noise is higher than that by noise from other sources such as industrial noise or transportation noise. The aim of the present study was to establish the exposure-response relationship between wind turbine noise exposure and the expected...conference paper 2009
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Salomons, E.M. (author), van Maercke, D. (author), Randrianoelina, A. (author), TNO Bouw en Ondergrond (author)The Harmonoise sound propagation model ('the Harmonoise engineering model') was developed in the European project Harmonoise (2001-2004) for road and rail traffic noise. In 2008, CSTB Grenoble and TNO Delft have prepared a detailed description of the various steps involved in a calculation with the Harmonoise model. In the course of this joint...conference paper 2009
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Borst, H.C. (author), Salomons, E.M. (author), Lohman, W.J.A. (author), Zhou, H. (author), Miedema, H.M.E. (author), TNO Bouw en Ondergrond (author)Spatial planning in urban areas is complex. Besides noise from different source types, many other aspects play a role. In order to support local authorities and others involved in spatial planning, TNO has developed an interactive instrument: 'Urban Strategy', which integrates a detailed interactive noise map with other aspects such as traffic...conference paper 2009
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Janssen, S.A. (author), Vos, H. (author), Miedema, H.M.E. (author), van Kempen, E.E.M.M. (author), Breugelmans, O.R.P. (author), TNO Bouw en Ondergrond (author)On the basis of findings from recent surveys, discussion has been raised as to whether the annoyance of residents at a given aircraft noise exposure level has increased over the years. To verify the hypothesized trend and to identify its possible causes, the large database used to establish earlier exposure-response relationships was updated...conference paper 2009
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Salomons, E.M. (author), Polinder, H. (author), Lohman, W. (author), Zhou, H. (author), Borst, H. (author), TNO Bouw en Ondergrond (author)A new engineering model for sound propagation in cities is presented. The model is based on numerical and experimental studies of sound propagation between street canyons. Multiple reflections in the source canyon and the receiver canyon are taken into account in an efficient way, while weak reflections by distant buildings involving multiple...conference paper 2009
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Galanti, F.M.B. (author), Koopman, A. (author), TNO Bouw en Ondergrond (author)Vibration insulation of buildings is often achieved by introducing springs in the foundation. It can be a very effective measure, especially against vibration induced noise, but also a very costly one. There is a need for less costly measures which, although less effective, may achieve the required vibration reduction. For a specific case such...conference paper 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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Wesselink, J.M. (author), Berkhoff, A.P. (author)This paper discusses the influence of the reconstruction and anti-aliasing filters on the performance of a digital implementation of a Wiener filter for active noise control. The overall impact will be studied in combination with a multi-rate system approach. A reconstruction and anti-aliasing filter will be selected and its parameters will be...conference paper 2006
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Dittrich, M.G. (author), TNO Industrie en Techniek (author)Track decay rates are an important quanty relevant for raiway rolng noise. The vertical and ateral track decay rates are used to characterise he dynamc behaviour of the rack, both as an nput to calculations and for track characterisation given n EU regulations (TSIs). TNO has developed ethods and software capable of deriving he decay rates,...conference paper 2006
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Miedema, H.M.E. (author), Borst, H.C. (author), TNO Bouw en Ondergrond (author)A system that rates noise on the basis of noise maps has been developed which is based on empirical exposure-response relationships, so that effects in the community will be lower if the system gives a better rating. It is consistent with noise metrics and effect endpoint chosen in the EU, i.e., it uses L</field>den and L</field>night and...conference paper 2006
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Borst, H.C. (author), Miedema, H.M.E. (author), van der Laan, W.P.N. (author), Lohman, W.J.A. (author), TNO Bouw en Ondergrond (author)Noise annoyance due to transportation is widespread in industrialized countries and in urban areas in the developing countries. The European Noise Directive (END) requires an assessment of the noise situation as well as the formulation of action plans for the reduction of the number of people harmfully affected by environmental noise. In this...conference paper 2006
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van der Eerden, F.J.M. (author), van den Berg, F. (author), van 't Hof, J. (author), van Arkel, E. (author), TNO Industrie en Techniek (author)A blast absorber test was conducted at the Aberdeen Test Centre from 13 to 17 June 2005. The test was set up to determine the absorbing and shielding effect of a gravel pile, of 1.5 meters high and 15 by 15 meters wide, on blasts from large weapons: e.g. armor, artillery or demolition. The blast was simulated with single brick C-4 charges of 570...conference paper 2006
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Janssens, M.H.A. (author), Dittrich, M.G. (author), de Beer, F.G. (author), Jones, C.J.C. (author)In recent years, considerable effort has been spent at a European level to establish comprehensive methods for the experimental assessment of rolling noise emission of rail-bound vehicles and tracks. This work was concentrated in the European METARAIL and STAIRRS projects. The objective of these was to improve the accuracy and the...article 2006
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Berkhoff, A.P. (author), Wesselink, J.M. (author), TNO Industrie en Techniek (author)This paper discusses configurations for controlling broadband noise using piezoelectrically excited panels. The configurations can be distinguished by the physical layout and by the control structure. The physical layout of the system has some influence on the complexity of the control algorithms. For particular actuator/sensor combinations and...conference paper 2006
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Gerretsen, E. (author), TNO Industrie en Techniek (author)The standard EN 12354 gives prediction models for the airborne and impact sound transmission between rooms in buildings. For buildings with mainly heavy, monolithic structures the standard has proven to be quite useful. However, in case of lightweight building elements the standard only gives global indications about the appropriate modelling....conference paper 2006
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Dittrich, M.G. (author), van Beek, P.J.G. (author), TNO Industrie en Techniek (author)Road traffic noise is one of the major environmental noise sources that is known to cause health problems. Despite existing noise reception items, the continuing growth of traffic causes higher levels than the lims allow. Consequently, excessive costs are incurred for noise barriers along roads and motorways. It's therefore essential to...conference paper 2006
Searched for: subject%3A%22Acoustic%255C%2Bvariables%255C%2Bcontrol%22
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