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Dittrich, M.G. (author)
De overheid wil negatieve effecten van verkeersgeluid in Nederland aanpakken vanuit een brede visie gericht op de periode tot 2050. Daarvoor is inzicht nodig in de effecten van ontwikkelingen in die periode in beleid, mobiliteit en technologie. TNO heeft een verkennende studie uitgevoerd en daarna een beleidsindicator ontwikkeld waarmee deze...
article 2016
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von Benda-Beckmann, A.M. (author), Wensveen, P.J. (author), Samarra, F.I.P. (author), Beerens, S.P. (author), Miller, P.J.O. (author)
Sound-recording acoustic tags attached to marine animals are commonly used in behavioural studies. Measuring ambient noise is of interest to efforts to understand responses of marine mammals to anthropogenic underwater sound, or to assess their communication space. Noise of water flowing around the tag reflects the speed of the animal, but...
article 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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Salomons, E.M. (author), Lohman, W.J.A. (author), Zhou, H. (author)
Propagation of sound waves in air can be considered as a special case of fluid dynamics. Consequently, the lattice Boltzmann method (LBM) for fluid flow can be used for simulating sound propagation. In this article application of the LBM to sound propagation is illustrated for various cases: free-field propagation, propagation over porous and...
article 2016
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Bronkhorst, A.W. (author)
How do we recognize what one person is saying when others are speaking at the same time? This review summarizes widespread research in psychoacoustics, auditory scene analysis, and attention, all dealing with early processing and selection of speech, which has been stimulated by this question. Important effects occurring at the peripheral and...
article 2015
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van der Rots, R. (author), Berkhoff, A.P. (author)
This paper describes numerical and experimental results of beamforming algorithms for generation of directional sound. The intended application is a sound source for cars with the objective to warn vulnerable road users while minimising noise pollution. Nowadays, sensors exist which are able to reveal the position of the vulnerable road users,...
article 2015
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Ho, J.H. (author), Berkhoff, A.P. (author)
This paper presents an acoustic source with a small thickness and high bending stiffness. The high bending stiffness is obtained with a sandwich structure in which the face of the sandwich structure internal to the source is perforated to increase the acoustic compliance, thereby leading to increased electroacoustic conversion efficiency....
article 2015
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Jolani, S. (author), Debray, T.P.A. (author), Koffijberg, H. (author), van Buuren, S. (author), Moons, K.G.M. (author)
Individual participant data meta-analyses (IPD-MA) are increasingly used for developing and validating multivariable (diagnostic or prognostic) risk prediction models. Unfortunately, some predictors or even outcomes may not have been measured in each study and are thus systematically missing in some individual studies of the IPD-MA. As a...
article 2015
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Hornikx, M. (author), Forssén, J. (author), Botteldooren, D. (author), van Renterghem, T. (author), Wei, W. (author), Ögren, M. (author), Salomons, E. (author)
Mapping of road traffic noise in urban areas according to standardized engineering calculation methods systematically results in an underestimation of noise levels at areas shielded from direct exposure to noise, such as inner yards. In most engineering methods, road traffic lanes are represented by point sources and noise levels are computed...
article 2014
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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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Garai, M. (author), Schoen, E. (author), Behler, G. (author), Bragado, B. (author), Chudalla, M. (author), Conter, M. (author), Defrance, J. (author), Demizieux, P. (author), Glorieux, C. (author), Guidorzi, P. (author)
In Europe, in situ measurements of sound reflection and airborne sound insulation of noise barriers are usually done according to CEN/TS 1793-5. This method has been improved substantially during the EU funded QUIESST collaborative project. Within the same framework, an inter-laboratory test has been carried out to assess the repeatability and...
article 2014
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Moreau, L. (author), Hunter, A.J. (author), Velichko, A. (author), Wilcox, P.D. (author)
In nondestructive testing, being able to remotely locate and size defects with good accuracy is an important requirement in many industrial sectors, such as the petrochemical, nuclear, and aerospace industries. The potential of ultrasonic guided waves is well known for this type of problem, but interpreting the measured data and extracting...
article 2014
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Shamir, L. (author), Carol Yerby, C. (author), Simpson, R. (author), von Benda-Beckmann, A.M. (author), Tyack, P. (author), Samarra, F. (author), Miller, P. (author), Wallin, J. (author)
Vocal communication is a primary communication method of killer and pilot whales, and is used for transmitting a broad range of messages and information for short and long distance. The large variation in call types of these species makes it challenging to categorize them. In this study, sounds recorded by audio sensors carried by ten killer...
article 2014
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Wei, W. (author), Botteldooren, D. (author), van Renterghem, T. (author), Hornikx, M. (author), Forssen, J. (author), Salomons, E. (author), Ogren, M. (author)
Surveys show that inhabitants of dwellings exposed to high noise levels benefit from having access to a quiet side. However, current practice in noise prediction often underestimates the noise levels at a shielded façade. Multiple reflections between façades in street canyons and inner yards are commonly neglected and façades are approximated as...
article 2014
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Salomons, E.M. (author)
Traffic noise at an intersection controlled by traffic lights shows noise level variations due to the alternating green and red lights for the different trafficstreams. Noise peaks caused by automobiles pulling up or passing by at highspeed may be quite annoying for people living near the intersection. Detailedprediction of the variations is...
article 2014
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Vos, J. (author), Houben, M.M.J. (author), TNO Technische Menskunde (author)
In the present study relations between the level of impulse sounds and the observed proportion of behaviorally confirmed awakening reactions were determined. The sounds (shooting sounds, bangs produced by door slamming or by container transshipment, aircraft landings) were presented by means of loudspeakers in the bedrooms of 50 volunteers. The...
article 2013
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Ettwig, J.F. (author), Bronkhorst, A.W. (author)
We report a series of dual-task experiments, in which a rapid serial visual presentation (RSVP) task was combined with a visual search task. Orientation, motion, and color were used as the defining target features in the search task. Lag between target onsets was manipulated and interference between the two tasks was quantified by measuring...
article 2013
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van Ophem, S. (author), Berkhoff, A.P. (author)
By formulating the feed-forward broadband active noise control problem as a state estimation problem it is possible 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 derived to perform this state...
article 2013
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Beerends, J.G. (author), Schmidmer, C. (author), Berger, J. (author), Obermann, M. (author), Ullman, R. (author), Pomy, J. (author), Keyhl, M. (author)
In this and the companion paper Part II, the authors present the Perceptual Objective Listening Quality Assessment (POLQA), the third-generation speech quality measurement algorithm, standardized by the International Telecommunication Union in 2011 as Recommendation P.863. In contrast to the previous standard (P.862 Perceptual Evaluation of...
article 2013
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Ainslie, M.A. (author)
Passive acoustic monitoring with a single hydrophone has been suggested as a cost-effective method to monitor population density of echolocating marine mammals, by estimating the distance at which the hydrophone is able to intercept the echolocation clicks and distinguish these from the background. To avoid a bias in the estimated population...
article 2013
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