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Brink M.,ETH Zurich | Schreckenberg D.,ZEUS GmbH | Thomann G.,Empa Swiss Federal Laboratories for Materials Testing and Research | Basner M.,University of Pennsylvania | Basner M.,German Aerospace Center
Acta Acustica united with Acustica | Year: 2010

This article discusses aircraft noise effect assessment with noise effect indexes, such as have recently been developed for noise monitoring purposes at the airports of Zurich and Frankfurt. Aircraft noise indexes are noise assessment instruments that express the overall effects of aircraft noise as a single figure which reflects the total amount of people that are in some way affected by the noise of a particular airport. By accounting for the most important effect measures (such as annoyance or awakening reactions) and by weighting these measures according to the population density at each grid point within a defined geographic perimeter, noise effect indexes provide residents and authorities with an integral picture of the total noise effect. The paper reviews basic features of noise effect indexes and reports about the development and the current practical application of such indexes. Moreover, it points to specific not yet fully resolved issues such as accounting for the diurnal variation of noise effects, the definition of calculation perimeters, and the weighting of day and night effects including the question of unification of different effect measures into one index. © S. Hirzel Verlag.

Schreckenberg D.,ZEUS GmbH
41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012 | Year: 2012

Residents of Raunheim (a town with 15,000 inhabitants, ca. 8 km west of Frankfurt Airport) are highly exposed to aircraft noise, in particular in case of east flight operation mode (LAeq,16h > 60 to 70 dB(A) for operation mode east, LAeq,16h > 50 to 60 dB(A) for operation mode west). The whole city is included in the night protection zone and thus benefits from the airports noise protection program. That is, house owners are entitled to benefit from a 100% funding of sound proof windows combined with ventilation systems in bedrooms by the airport operator Fraport AG. To assess the residents' acceptance and use of sound proof windows and ventilators as well as the associations with aircraft noise annoyance, sleep disturbances, and the perceived room climate a telephone survey with 765 residents in Raunheim was conducted. The results indicate that sleeping with usually closed windows and active ventilators in bedrooms is associated with negative evaluation of the indoor climate, elevated aircraft noise annoyance, and reported sleep disturbances. This suggests that these insulation measures cannot replace operational measures to reduce aircraft noise such as night flight limitations, optimized take-offs, and landing procedures.

Kovacs L.,Kecskemet College | Marki F.,Budapest University of Technology and Economics | Bartha B.,Budapest University of Technology and Economics | Schreckenberg D.,ZEUS GmbH
Proceedings of Forum Acusticum | Year: 2011

Nowadays air traffic is one of the most annoying environmental noise sources. A lot of people living near airports are disturbed by aircraft noise. The prediction of the effect on disturbance of new air traffic related facilities or procedures are very complex and uncertain. On the other hand, listening tests and/or field studies related to aircraft noise are expensive and time consuming as well, especially in the case of large number of subjects. This paper aims to introduce a novel prediction tool, which can estimate the disturbance of residents living near to airports caused by air traffic. The prediction tool to be presented consists of a multi-level pre-processor and a Radial Basis Function Neural Network approximator. The pre-processor itself is based on statistical pre-filtering and hierarchical clustering techniques. The new tool has been developed based on the data of a recent field study around a large European airport. Its performance has been evaluated by cross validation technique. The achieved low estimation error will be presented to demonstrate the power of the tool.

Liepert M.,Mohler Partner Ingenieure AG | Mohler U.,Mohler Partner Ingenieure AG | Schreckenberg D.,ZEUS GmbH
42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013: Noise Control for Quality of Life | Year: 2013

Rail grinding is widely used as a noise mitigation measure. In order to assess the impact of rail grinding a socio- Acoustical field survey was carried out. In two sections along a railway line between Bavaria and Baden Württemberg railway grinding was conducted to reduce noise emission. In both sections rail condition before grinding were worse than average. Before and after the rail grinding both acoustical measurements and interviews of the residents were done. In order to investigate the influence of active information about the rail grinding measure the residents have been informed only in the Baden Württemberg section. The acoustical measurements before and after rail grinding were analyzed separating the effectiveness of the rail grinding for each type of train. As expected noise reductions were best for disc-braked trains (e.g. ICE and passenger trains about 5 to 7 dB) and less effective for freight trains (about 1 dB). Due to the failure of the rail grinding vehicle the noise reduction in the Baden Württemberg section with information was less than in the Bavarian section. The effect of grinding on the noise annoyance of the residents is described in part II of this contribution by Dirk Schreckenberg [2].

Schreckenberg D.,ZEUS GmbH | Mohler U.,Mohler Partner Ingenieure AG | Liepert M.,Mohler Partner Ingenieure AG
42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013: Noise Control for Quality of Life | Year: 2013

A socio- Acoustical field survey (see Internoise 2013 paper of Manfred Liepert et al. for study design and acoustical results) was carried out to assess the impact of rail grinding on noise levels and noise responses of residents living along the grinded railway line. This contribution deals with the role of information about the potential noise reducing effects of rail grinding given to residents. The rail grinding was done on a railway line connecting Baden-Wuerttemberg with Bavaria in South Germany. On the Baden-Wuerttemberg side communities were informed about the rail grinding and its noise-reducing effect before the grinding was done ('informed' area). On the Bavarian side this information was not given ('uninformed area'). 340 residents were interviewed about 3 months before and 1-2 months after the grinding. Noise levels were assessed for the address of each participant. The effect of grinding on noise levels was low because of technical problems: LAeq for daytime and night- Time was reduced on average about 1-2 dB after grinding. Only residents from the 'informed area' showed a significant decrease in annoyance and disturbances, whereas noise responses of participants from the 'uninformed area' did not change significantly. The results indicate that informing residents considerably supports the impact of noise abatement measures on residents' noise responses.

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