‘Low Noise Road Traffic’—The German research program, ‘LeiStra2’

2009 ◽  
Vol 57 (2) ◽  
pp. 148 ◽  
Author(s):  
Arne Lorenzen
Keyword(s):  
Research Program ◽  
Road Traffic ◽  
Low Noise ◽  
German Research

Comparison of Noise Reduction Performance Evaluation Methods for Low-Noise Pavement in Korea- Part

2021 ◽  
Vol 263 (4) ◽  
pp. 2930-2939
Author(s):  
Byungchae Kim ◽  
Hyunjin Kim ◽  
Wonuk Kang
Keyword(s):  
Noise Reduction ◽  
Noise Level ◽  
Measurement Method ◽  
Road Traffic ◽  
Low Noise ◽  
Management Standards ◽  
Close Proximity ◽  
Porous Pavement ◽  
Reduction Effect ◽  
Measurement Location

In Korea, road noise is assessed as a measurement method of exterior noise emitted by road vehicle for management standards by the National Institute of Environmental Sciences. In this method, the noise felt at the actual pickup point is measured as LAeq (the roadside equivalent noise level). Recently, to clarify the standard for measuring noise on low-noise pavements, the CPX (ISO11819-2; Close-proximity method) was first introduced in the Porous Pavement Guidelines of the Ministry of Land, Infrastructure and Transport. According to ISO, the CPX adopts the side microphone as a mandatory measurement location, and the rear optional. The side location has been a mandatory due to its high correlation with SPB (ISO 11819-1, Statistical Pass-by method). However, according to our previous study on the correlation evaluation between L and CPX rear microphone noise level, both noise reduction effect was about 9-12 dB(A) showed a high correlation in Korea where heavy road traffic is common. The following study aims to show the consistent correlation between the L and CPX rear noise level. Furthermore, it is intended to be helpful in selecting the location of the CPX microphone that can most effectively represent the actual noise on the low-noise pavement in Korea.

RESEARCH PROGRAM ON LOW-NOISE MICROWAVE RECEIVER AMPLIFYING DEVICES

1960 ◽  
Author(s):  
A. Presser ◽  
F. Sterzer ◽  
G. Hodawanec ◽  
H. Wolkstein
Keyword(s):  
Research Program ◽  
Low Noise

scholarly journals The Impact of Thin Asphalt Layers as a Road Traffic Noise Intervention in an Urban Environment

2021 ◽  
Vol 13 (22) ◽  
pp. 12561
Author(s):  
Ablenya Grangeiro de Barros ◽  
Jarl K. Kampen ◽  
Cedric Vuye
Keyword(s):  
Noise Exposure ◽  
Road Traffic ◽  
Traffic Noise ◽  
Low Noise ◽  
Urban Environments ◽  
Comfort Level ◽  
Road Traffic Noise ◽  
Acoustic Measurements ◽  
Noise Levels ◽  
The Impact

Low-noise thin asphalt layers (TALs) are a feasible solution to mitigate road traffic noise in urban environments. Nevertheless, the impacts of this type of noise intervention are reported mostly regarding noise levels, while non-acoustic aspects influencing the population perception are still little-known. This study investigates the implementation of TALs in two streets of Antwerp, Belgium. The effectiveness of the intervention was measured via noise modelling and acoustic measurements of road traffic noise. A reduction of 2.8 dB in noise exposure was observed in Lden and Lnight, while SPB measurements showed decreases up to 5.2 dB on the roadside. The subjective impacts of the TALs were evaluated via self-administered surveys and compared to results from control streets. The annoyance indicators were positively impacted by the TALs implementation, resulting in annoyance levels similar or lower than in the control streets. The TALs did not impact the reported physical complaints, sleep quality, and comfort level to perform activities.

scholarly journals Low noise levels of BEV electric cars - an advantage or disadvantage?

2018 ◽  
Vol 19 (12) ◽  
pp. 221-224
Author(s):  
Ewelina Sendek-Matysiak
Keyword(s):  
Co2 Emissions ◽  
Road Traffic ◽  
Development Trend ◽  
Low Noise ◽  
Electric Motors ◽  
Noise Levels ◽  
Noise Emission ◽  
Negative Effects ◽  
Electric Cars ◽  
Automotive Market

Everything indicates that the future of the automotive market is related to the use of electric motors. It is related to, among others with the introduction of increasing restrictions on CO2 emissions and noise. In addition, the fuel market itself (mining and processing) has major limitations not only ecological, but above all economical and political. Supplying cars exclusively from batteries is currently a strong development trend propagated almost by all major manufacturers. One of the researched aspects of vehicles introduced to the market is the issue of noise emission, whose emission has both positive and negative effects on road traffic.

Study of the road traffic noise prediction method applicable to low-noise road surfaces

2010 ◽  
Vol 31 (1) ◽  
pp. 102-112 ◽  
Author(s):  
Keisuke Tsukui ◽  
Yasuo Oshino ◽  
Gijsjan van Blokland ◽  
Hideki Tachibana
Keyword(s):  
Road Traffic ◽  
Traffic Noise ◽  
Prediction Method ◽  
Low Noise ◽  
Road Traffic Noise ◽  
Noise Prediction ◽  
The Road ◽  
Road Surfaces

State-of-the-Art Prediction and Control of Road Traffic Noise in France

1998 ◽  
Vol 1626 (1) ◽  
pp. 71-77 ◽  
Author(s):  
Michel C. Bérengier ◽  
Fabienne Anfosso-Lédée
Keyword(s):  
Sound Propagation ◽  
Road Traffic ◽  
Numerical Models ◽  
Traffic Noise ◽  
Low Noise ◽  
Road Traffic Noise ◽  
Road Noise ◽  
The Road ◽  
Road Pavement ◽  
Prediction And Control

Because traffic noise is considered by the French population as the primary environmental nuisance, prediction of road traffic noise and development of efficient noise control techniques is very important. The first step is to analyze the source, the main part of which is due to the contact between tires and the road pavement. Many efforts have been devoted to the assessment of a reliable measurement method, and a classification of road pavements in relation to noise has been established for some years. To abate road traffic noise, special attention has been paid to low-noise pavements. Thus, the modeling of the absorption properties of porous asphalts has been particularly studied in the past 10 years. The second step is to understand the physics of sound propagation outdoors, especially the meteorological effects on the propagation of road traffic noise. Both theoretical and experimental approaches have been undertaken. Finally, the effect of road noise barriers of any shape on the propagation of road noise and their interaction with porous road surfaces have been investigated by using numerical models.

Conceptual Design of a Medium-Endurance Research Vessel Optimized for Mission Flexibility and Seakeeping

1987 ◽  
Vol 24 (02) ◽  
pp. 170-192
Author(s):  
Bruce L. Hutchison ◽  
Duane H. Laible
Keyword(s):  
Conceptual Design ◽  
Research Program ◽  
General Purpose ◽  
Low Noise ◽  
Laboratory Work ◽  
Laboratory System ◽  
Noise And Vibration ◽  
Five Disciplines ◽  
The University ◽  
Large Vessels

This paper reports on a study to define a large, medium-endurance general-purpose oceangoing ship that can carry out an effective research program in any of the five disciplines (biological, chemical, geological, geophysical, and physical) that characterize modern oceanography. The general requirements specify a vessel of the same size, but of greater capability, than the present large vessels in the University-National Oceanographic Laboratory System fleet, carrying a team of about 25 researchers to most areas of the world's ocean in reasonable comfort and providing a platform that will allow more overside and laboratory work in higher sea states than is now possible. Other general requirements discussed herein include flexibility, low noise and vibration levels, and economy. The latter point requires that the emphasis on increased capability does not obscure the need to develop vessels that are economical to construct and operate.

scholarly journals NASA/Army/Bell XV-15 Tiltrotor Low Noise Terminal Area Operations Flight Research Program

2002 ◽  
Vol 47 (4) ◽  
pp. 219 ◽  
Author(s):  
David A. Conner ◽  
Bryan D. Edwards ◽  
William A. Decker ◽  
Michael A. Marcolini ◽  
Peter D. Klein
Keyword(s):  
Research Program ◽  
Low Noise ◽  
Terminal Area
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