Adverse effects of long term exposure to road traffic noise

Road traffic is a prominent source of environmental noise exposure in urbanized areas. Because of its common presence, traffic is a source of exposure that is not easy to avoid. As a consequence, it is affecting a substantial proportion of residents in their homes, and in their living environment more in general. In view of reducing the number...

Active noise control with fast array recursive least squares filters using a parallel implementation for numerical stability

Noise reduction in feedforward active noise control systems with a rapidly changing primary path requires rapid convergence and fast tracking. This can be accomplished with a fast-array Kalman method which uses an efficient rotation matrix technique to calculate the filter parameters. However, finite precision effects lead to unstable behavior....

Model based monitoring for industrial and traffic noise control

Noise control starts by understanding the actual noise situation. Especially for situations where the distance between industrial and traffic noise sources and a local community is in the order of one kilometer or more, it may not be clear what sources are the main contributors to annoyance. Then a combination of monitoring and modeling is...

Imputation of systematically missing predictors in an individual participant data meta-analysis: A generalized approach using MICE

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...

Toekosmtverkenning weg- en railverkeersgeluid : Een blik in de toekomst: hoe kan geluidhinder van weg en railverkeer veranderen door mobiliteitsgroei, technologie en wetgeving?

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...

Separating underwater ambient noise from flow noise recorded on stereo acoustic tags attached to marine mammals

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...

The ODELIA Study on Noise Limits for Outdoor Machinery

In the ODELIA study for the European Commission an assessment of the outdoor equipment noise directive 2000/14/EC and its amendment 2005/88/EC has been performed. The directive requires noise marking for 57 types of equipment used outdoors, and sets noise limits for 22 of these. Since the limits have remained unchanged for many years, there is...

A numerically stable, finite memory, fast array recursive least squares filter for broadband active noise control

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...

Simulation of sound waves using the Lattice Boltzmann Method for fluid flow: Benchmark cases for outdoor sound propagation

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...

The swarms approach to integration of underwater and overwater communication sub-networks and integration of heterogeneous underwater communication systems

The management of a heterogeneous mix of underwater vehicles needs a robust and reliable communication network, able to connect the remote command and control station (typically ashore or on board of a support ship) with nodes and vehicles in the deep sea. on the basis of this scenario, the infrastructure shall satisfy requirements such as:...

Developments in Regulations for Sound Emission of L-category vehicles

Acoustic characteristics and noise control measures for steel road bridges