Evaluation of the Trailer Coast-by Method for Tire/road Noise Measurements PDF Download
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Author: Ulf Sandberg
Publisher:
ISBN:
Category : Traffic noise
Languages : en
Pages : 32
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Book Description
Author: Ulf Sandberg
Publisher:
ISBN:
Category : Traffic noise
Languages : en
Pages : 32
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Book Description
Author: Ulf Sandberg
Publisher:
ISBN:
Category : Tires
Languages : en
Pages : 16
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Author: Ulf Sandberg
Publisher:
ISBN:
Category : Automobiles
Languages : en
Pages : 104
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Author: Jerzy A. Ejsmont
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: U. Sandberg
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Ulf Sandberg
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
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Book Description
Author: Dae Seung Cho
Publisher:
ISBN:
Category : Coasting and steady
Languages : en
Pages : 7
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Book Description
A new close proximity (NCPX) method has been proposed and applied for the tire-road noise characterization of highway traffic. The implementation of NCPX is based on a set of surface microphones that is attached to a vehicle to directly measure the tire noise. To consider a combined effect of vehicle and road factors, a comprehensive field test has been performed with seven vehicle types at nine pavement sections of the test road. Testing parameters also include a vehicle speed ranging from 50 to 120 km/h, and two driving modes are applied at each speed: coasting and steady. It is found that asphalt pavements are quieter than all concrete pavements irrespective of testing conditions. Among concrete pavements, an 18-mm longitudinally-tined surface exhibits the quietest noise level, while a random transversely-tined surface is ineffective in minimizing the tire noise. Finally, the effect of a heavy axle load on the tire/noise generation is discussed.
Author: Abdulhaq Hadi. Abedali Al-Haddad
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 19
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Book Description
Noise pollution is another environmental pollutant to be formally recognized as an actual threat to human health and the quality of life. The growth in noise pollution is unsustainable because it involves direct and cumulative adverse health effects. Pavement characteristics are one of the important factors affecting noise generation and propagation. The selection of an appropriate pavement mixture or texture with the proper maintenance efforts is the best method to control the main cause of pavement noise. Therefore, the major objective of this research study was to develop a methodology to evaluate tire-pavement noise. Other objectives were investigating the effect of the pavement surface characteristics on the generation and propagation of the noise of asphalt concrete (AC) and portland cement concrete (PCC) at varying traffic speeds, and finally the development of a statistical model for prediction tire-pavement noise at varying traffic speeds. Field noise measurements were performed using a noise trailer developed in this study and attached to the parent vehicle. Overall, PCC sections with higher skid resistance and lower average texture depth produced the highest noise levels compared with the conventional AC sections; PCC type had an average difference of about 1 dB(A) compared with the AC pavement. The presence of surface distress led to increasing the tire-pavement noise level by 7 dB(A). There were increments of about 1 dB(A) and 7 dB(A) to change vehicle speed from 20 to 40 km/h and from 40 to 60 km/h, respectively. Regarding the measurement period effect on the tire-pavement noise level, tire-pavement noise had an increment of about 7 dB(A) during daytime compared with night.
Author: Paul R. Donavan
Publisher: Transportation Research Board
ISBN: 0309117682
Category : Tire/pavement noise
Languages : en
Pages : 47
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Book Description
Introduction -- Literature search -- Evaluation of alternative test methods -- Evaluation of OBSI Test Parameters -- Demonstration Testing of OBSI Procedure -- Conclusions, recommendations and suggested research -- References -- Attachment -- Appendices.
Author:
Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 420
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Book Description
