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.

Optimized Asphalt Mixtures for Noise Reduction in Lithuanian Roads

2014 ◽  
Vol 614 ◽  
pp. 618-621
Author(s):  
Audrius Vaitkus ◽  
Tadas Andriejauskas ◽  
Laura Čygaitė ◽  
Jurgita Židanavičiūtė
Keyword(s):  
Noise Reduction ◽  
Noise Pollution ◽  
Low Noise ◽  
Asphalt Pavements ◽  
Noise Levels ◽  
Road Noise ◽  
Negative Effects ◽  
Development Experience ◽  
Growing Economy ◽  
Generation Mechanisms

In the world of growing economy and population, the need of transportation is rapidly increasing also raising problems of noise pollution. Environmental noise levels are increasing in parallel with increasing traffic flows resulting negative effects for society, wildlife and economy. The article gives an overview about the main transport noise source tyre/road noise, its generation mechanisms and influencing factors. One of the most effective and promising tyre/road noise solutions is low noise pavements, which has different noise reduction approaches. Low noise asphalt pavements and theoretical noise reduction principles are analysed in the paper as well as the development experience of particular low noise asphalt pavements for Lithuanian conditions.

scholarly journals New Risk Situations Related to Low Noise from Electric Vehicles: Perception of Workers as Pedestrians and Other Vehicle Drivers

2020 ◽  
Vol 17 (18) ◽  
pp. 6701
Author(s):  
María Carmen Pardo-Ferreira ◽  
Juan Antonio Torrecilla-García ◽  
Carlos de las Heras-Rosas ◽  
Juan Carlos Rubio-Romero
Keyword(s):  
Electric Vehicles ◽  
Urban Areas ◽  
Low Noise ◽  
Hybrid Vehicles ◽  
Future Research ◽  
Noise Levels ◽  
Electric Cars ◽  
Road Users ◽  
Low Speeds ◽  
Hybrid Electric

Sales of electric and hybrid electric vehicles are increasing steadily worldwide, and consequently their presence increases in city areas. At low speeds, the low levels of noise produced by these vehicles could become a new risk factor for road users. However, the magnitude of the risk has not been accurately determined. In addition, its inclusion in the work environment could pose a new risk that should be managed. Thus, in relation to low noise levels of electric and hybrid vehicles, this study aimed to characterise the risk situations and determine the risk perception of workers as pedestrians and internal combustion engine vehicle drivers coming into contact with these vehicles. The data were extracted from 417 questionnaires filled out by the employees of public service companies who come into contact with electric and hybrid vehicles during their working day in the city of Málaga, in the region of Andalusia, Spain. According to the experiences reported, it seems that the risk due to the low noise levels of electric vehicles is moderate and does not reach alarming levels. These risk situations usually occurred in low speed urban areas, particularly when crossing the road, or in semi-pedestrian areas. Almost half the respondents considered that the electric vehicle poses a risk to other road users because it is more difficult to hear, and they believe it likely that other road users could be injured. Despite that risk, pedestrians did not change their way of walking or moving around the parking areas and other areas of the company. Electric and hybrid electric cars are now required to produce sound when travelling at low speeds. Nevertheless, the effectiveness of this measure should be assessed once implemented and future research should explore alternative non-acoustic measures.

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 Strategic directions in implementation of environmental noise directive in international and national legislation

2006 ◽  
Vol 4 (1) ◽  
pp. 21-34 ◽  
Author(s):  
D. Cvetkovic ◽  
M. Prascevic
Keyword(s):  
Road Traffic ◽  
Local Level ◽  
Environmental Noise ◽  
Green Paper ◽  
Noise Levels ◽  
Noise Emission ◽  
Noise Sources ◽  
Noise Mapping ◽  
The Public

Until 1996, the noise policy in Europe had concentrated on the regulations of noise emission from noise sources as road traffic, aircraft and equipment used outdoors. Although noise limits have become increasingly stringent over the years, no corresponding significant reduction in noise emission has been observed. In response to this, the European noise policy has been revised to focus on noise reception. Thus, the Green Paper from 1996 defines as the basic aim of future noise policy that "no person should be exposed to noise levels which endanger health and quality of life". The structure of a new future noise policy has to be based on the Directive on the Assessment and Management of Environmental Noise, 2002/43/EC. The Directive defines the three key elements: assessment of environmental noise through strategic noise mapping, implementation of action plans to reduce noise where necessary and information for the public about noise levels and its effects. The Directive defines the common noise indicators and methods for strategic noise mapping as well as the deadline for the Directive implementation. The Directive implementation at national and local level means enacting the new acts or amending existing acts. In this paper, the proposal of steps that can be taken for harmonization of national acts with the basic principles and elements of the Directive is presented and discussed.

scholarly journals The most important barriers to the development of electromobility in Poland

2020 ◽  
Vol 2020 (3) ◽  
pp. 7-18
Author(s):  
Ewelina Sendek-Matysiak ◽  
Keyword(s):  
Initial Phase ◽  
External Costs ◽  
Single Charge ◽  
Noise Levels ◽  
Electric Cars ◽  
Automotive Market ◽  
Electric Car ◽  
Maintenance Requirements ◽  
Lower Noise ◽  
No Emissions

In accordance with the Strategy for Responsible Development, by 2025, over 1 million electric cars powered solely from BEV batteries are to travel on Polish roads [24]. However, although such cars have a number of advantages such as lower maintenance costs, higher acceleration, lower maintenance requirements, lower noise levels than internal combustion cars, and above all no emissions at their place of use, BEV's share in the automotive market remains small and in 2018 year was only 0.1%. Such a marginal number of currently used BEV electric cars in Poland, proves that the electric mobility market is still in the initial phase and its development limits various difficulties. This article discusses the most important barriers to the development of electromobility in Poland related to with the price of buying an electric car, the range of driving on a single charge, infrastructure dedicated to them. Solutions have also been proposed, which should certainly affect the decisions of users when choosing a vehicle with a given type of drive, and consequently the development of electromobility. Keywords: Charging point; Electric vehicle BEV; Electromobility; External costs

Road Traffic Noise Levels at Different Types of Residential Areas in Nibong Tebal, Penang

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Herni Halim ◽  
◽  
Nur Fatin Najiyah Hamid ◽  
Mohamad Firdaus Mahamad Yusob ◽  
Nur Atiqah Mohamad Nor ◽  
...  
Keyword(s):  
Road Traffic ◽  
Traffic Noise ◽  
Road Traffic Noise ◽  
Residential Areas ◽  
Noise Levels ◽  
Different Types

scholarly journals Sleep Disturbance from Road Traffic, Railways, Airplanes and from Total Environmental Noise Levels in Montreal

2016 ◽  
Vol 13 (8) ◽  
pp. 809 ◽  
Author(s):  
Stéphane Perron ◽  
Céline Plante ◽  
Martina Ragettli ◽  
David Kaiser ◽  
Sophie Goudreau ◽  
...  
Keyword(s):  
Sleep Disturbance ◽  
Road Traffic ◽  
Environmental Noise ◽  
Noise Levels

Blow-Down Valve Noise and Interactions With Downstream Orifice Plates

2003 ◽  
Author(s):  
Denis G. Karczub ◽  
Fred W. Catron ◽  
Allen C. Fagerlund
Keyword(s):  
Noise Exposure ◽  
Control Valve ◽  
Low Noise ◽  
Noise Levels ◽  
Exposure Limits ◽  
Blow Down ◽  
Gas Processing ◽  
The Impact ◽  
Acoustic Fatigue ◽  
Infrequent Event

In a blow-down situation as might occur at a natural gas processing facility, noise levels are very high and significantly exceed the noise levels one would normally associate with a control valve. As the blow-down operation is an infrequent event, this may be permissible but requires consideration of the duration of these high noise levels to ensure that occupational noise exposure limits and acoustic fatigue limits are not exceeded. Tests of noise levels due to an 8-inch control valve in a 12-inch pipeline under blow-down conditions are compared here with noise level predictions based on the IEC standard. Consideration is also given to the impact of placing an orifice plate downstream of the control valve as is often done to reduce pressure drop across the valve in the expectation that control valve noise levels will be reduced. Simple orifice plates often installed by plant operators to achieve this goal are shown to have an adverse impact, and it is shown that a multi-hole diffuser or low-noise control valve should instead be used.

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.

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