Results 211 to 220 of about 109,455 (267)
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Directivity of railway noise sources
Journal of Sound and Vibration, 2006In the Harmonoise project the description of vertical and horizontal directivities of railway noise sources has been required. Other features of the source description are sound power level spectra in third octave bands as a function of speed and the physical location of the different sound sources. Based on systematic investigations methods to
Xuetao Zhang, Hans G. Jonasson
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Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 1999
Noise has long been established as having a major influence on the overall passenger environment. Unfortunately, the processes involved are often misunderstood and consequently the acoustic environment inside many vehicles is more a result of chance than any design process. By considering the user of the vehicles this paper shows how appropriate noise
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Noise has long been established as having a major influence on the overall passenger environment. Unfortunately, the processes involved are often misunderstood and consequently the acoustic environment inside many vehicles is more a result of chance than any design process. By considering the user of the vehicles this paper shows how appropriate noise
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Journal of Sound and Vibration, 1996
Abstract Strategies are much talked about, but frequently lack any substance. The general concepts of strategic planning are discussed and the need for it to have a focus, i.e., a clear objective, are emphasized. A structural approach to strategic plan development is advocated, with a definition of the relevant issues being a prerequisite for success.
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Abstract Strategies are much talked about, but frequently lack any substance. The general concepts of strategic planning are discussed and the need for it to have a focus, i.e., a clear objective, are emphasized. A structural approach to strategic plan development is advocated, with a definition of the relevant issues being a prerequisite for success.
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Railway vehicle internal noise
Journal of Sound and Vibration, 1977The mechanisms by which noise reaches the passenger in a rail vehicle are discussed. A summary is given of the basis on which suitable specifications for the interior noise level in a new vehicle can be selected. Methods are described by which the acoustic performance of a rail vehicle can be assessed at the design stage.
P.W. Eade, A.E.J. Hardy
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Applied Acoustics, 1998
Abstract Noise is assessed by the time-average sound level, LAT(x,D). The process of noise generation on a bridge and on an embankment is characterized by two parameters, λ and μ , which can be estimated from simultaneous measurements, LAT(x1,D) and LAT(x2,D).
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Abstract Noise is assessed by the time-average sound level, LAT(x,D). The process of noise generation on a bridge and on an embankment is characterized by two parameters, λ and μ , which can be estimated from simultaneous measurements, LAT(x1,D) and LAT(x2,D).
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Synthesis of pass-by railway noise
The Journal of the Acoustical Society of America, 2008Pass-by railway noise is one of the main problems in the community. Typically pass-by railway noise is estimated using Leq or Lden in dB(A) and often these methods do not reflect the listener perceptual overview. It is therefore necessary to reduce the pass-by railway noise by synthesizing the noise characters into various segments.
Shafiquzzaman Khan +2 more
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The Journal of the Acoustical Society of America, 2012
Railway tunnel portal noise is a concern in environmental impact assessment for railway projects. Railway noise is amplified inside the tunnel due to multiple reflections of highly sound reflective tunnel walls and such noise is then radiated from the tunnel portal.
Wilson HO +3 more
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Railway tunnel portal noise is a concern in environmental impact assessment for railway projects. Railway noise is amplified inside the tunnel due to multiple reflections of highly sound reflective tunnel walls and such noise is then radiated from the tunnel portal.
Wilson HO +3 more
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Noise and the docklands light railway
Applied Acoustics, 1989Abstract Railway noise has long been regarded as one of the least offensive forms of transportation noise, with relatively few complaints arising from normal operations. However, certain components of the noise from new inner-city light railway systems are generating a substantial hostile community reaction.
B. Shield, J. Roberts, M. Vuillermoz
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Abatement of Railway Noise in Germany
2018One of the most important environmental issues in densely populated areas is the problem of noise. Road traffic and railway noise and airports located in close proximity to the city is not only annoying for residents; it also leads to serious health issues and has an enormous negative economic impact.
R. Weinandy, P. Appel, T. Myck
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Railways: Noise and Vibration Issues
Noise & Vibration Worldwide, 1999Paul Eade, General Manager of Acoustic Design Ltd., describes how railways offer him and his team of noise control and vibration engineers varied and interesting technical ...
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