scholarly journals The study for installing noise barrier on highway route no.9

2018 ◽  
Vol 169 ◽  
pp. 01012
Author(s):  
Chaddanai Jiradecha ◽  
Pruethipong Singhatiraj
Keyword(s):  
Traffic Congestion ◽  
Noise Level ◽  
Noise Pollution ◽  
Mathematic Model ◽  
Rapid Expansion ◽  
Noise Barriers ◽  
Sensitive Areas ◽  
The People ◽  
Noise Barrier ◽  
A New Technique

Highway Route No. 9 is a Bangkok bypass motorway that aims to alleviate traffic congestion in greater Bangkok areas. Presently, it is found a rapid expansion of new communities residing along both side of Highway No. 9. To lessen the noise level, Department of Highways installed the noise barrier on the sensitive locations. However, people from communities living on both sides of highway still demand some additional noise pollution improvement. To improve the efficiency of using noise barriers and to promote environmental and social quality for the people on the sensitive communities along the highway route, the Department of Highways, therefore, designs a new technique for installing noise barrier on the sensitive areas, i.e. education institutions, temple, residential area. In addition, the mathematic model is applied to 12 selected locations of sensitive areas for monitoring the effectiveness of the new installation technique. The mathematic model is used for predict the future noise level after installation of noise barrier in year 2037. The results confirm that the appropriate height and width of noise barrier can improve the comfortable of the people on the sensitive area.

Research of Different Noise Barriers Efficiency at Different Temperature

2017 ◽  
Author(s):  
Tomas Vilniškis ◽  
Tomas Januševicius
Keyword(s):  
Air Temperature ◽  
Noise Level ◽  
Structural Changes ◽  
Field Measurements ◽  
Sound Waves ◽  
Noise Barriers ◽  
Different Temperatures ◽  
Noise Measurements ◽  
Noise Barrier ◽  
Key Aspects

In this article was analyzed acoustic efficiency of two different construction noise barriers. Field measurements of noise tests were carried out before and behind a wooden barrier, which height was 2.9 meters and a wooden wall with equipped roof, which height was 3.2 m. As is known the length of the wall, height, surface roughness, shape and material of the wall – key aspects of determining the effectiveness of noise barrier. Different materials, depending on their characteristics of the hard or soft, porous or dense, interact differently with the sound of waves. Article contains research results of noise measurements at positive and negative air temperature. There analyzing wooden noise barrier acoustic efficiency at different temperatures and the effects of temperature to the diffraction of sound waves through the peak of the barrier. Test results show, that noise barrier without structural changes reduced noise level to 14–22 dB, noise barrier with structural changes reduced noise level to 20–23,1 dB, when air temperature was positive. When air temperature was negative, noise barrier without structural changes reduced noise level to 15,5–21,4 dB, noise level with structural changes to 19–26,6 dB.

scholarly journals Operational Noise Assessment in an Open Cycle Power Plant: Study on the Existing Acoustical Performance.

2018 ◽  
Vol 7 (4.35) ◽  
pp. 11 ◽  
Author(s):  
Helmi A Halim ◽  
Gasim Hayder
Keyword(s):  
Power Plant ◽  
Noise Level ◽  
Performance Study ◽  
Noise Barriers ◽  
Noise Assessment ◽  
Noise Barrier ◽  
Open Cycle ◽  
Gas Turbine Power Plant ◽  
The Impact

This research is an acoustical performance study in an open cycle peaking gas turbine power plant located at the southern coast of Peninsula Malaysia. Referring to its location at the middle of residence and tourism area, throughout its operation years, several complains from public has been lodged about the excessive operational noise at the perimeter of the plant and statistically from the last decade, twenty-four (24) noise related public complains were recorded. This issue has initiated a study to determine the current operational noise level as well as the effectiveness of the existing noise barriers. Based on EIA approval, the boundary noise for the operation should be limited to 55 dB(A) at any time. The field measurement of noise level at two (2) different locations are assessed in-situ and continuously noise monitoring covering all the plant’s operational regime and at different plant operational pattern. These results are compared with the initial noise report during its early year of operation in 1999. Finally the hypotheses then compared with the referenced legislations. Results from all the methodologies show the current operational noise level of the plant are within the permissible limit, however the overall operational noise of the plant is increasing compared with 1999 report due to the increasing of surrounding activities as well as deteriorating of current engineering and natural noise barrier arrangement. Mitigation plans has been recommended to the management to minimize the impact of the excessive noise to surrounding residence and to the plant workers. On top of that, the theoretical and commercial implication of the research is also discussed.

scholarly journals 3D noise mapping for preselected locations of urban area with and without noise barriers: A case study of Delhi, India

Noise Mapping ◽  
2020 ◽  
Vol 7 (1) ◽  
pp. 74-83
Author(s):  
Pervez Alam ◽  
Kafeel Ahmad ◽  
S. S. Afsar ◽  
Nasim Akhtar
Keyword(s):  
Noise Level ◽  
Urban Areas ◽  
Road Traffic ◽  
Traffic Noise ◽  
Residential Building ◽  
Noise Pollution ◽  
Critical Issue ◽  
Road Traffic Noise ◽  
Noise Barriers ◽  
Noise Mapping

AbstractNoise pollution has been rising as a critical issue in recent days particularly for the people living in urban areas. This study has been conducted to find out the effects of traffic induced noise on nearby residential building through 3D noise mapping with and without noise Barriers. Monitoring has been carried out at various densely populated preselected locations of Delhi, India. Thereafter, 3D noise mapping has been done using hourly average noise levels for the locations exposed with maximum noise. The developed 3D noise map shows the variation of noise level along X, Y and Z direction for all selected locations before and after installation of noise barriers. Moreover, the result also shows that exact assessment of noise impact is possible through 3D noise mapping, when a multistory building close to the source of noise is taken into consideration. This paper also elaborates the adequate height, distance and NRC value of noise barrier to reduce the effect of road traffic noise on nearby high rise building. Reduction pattern of noise level can easily be visualized and evaluated by using these maps. This type of study could support decision makers during adaptation of suitable remedial measures.

scholarly journals Noise Attenuation Using Vegetal Supported Barriers and Buffers Zones in Obio/Akpor, Port Harcourt, Nigeria

2020 ◽  
pp. 49-60
Author(s):  
Mark Ogoro ◽  
Idika Sandra Ezinne ◽  
Dollah Osademe Chukwudi
Keyword(s):  
Urban Space ◽  
Noise Level ◽  
Noise Exposure ◽  
Noise Pollution ◽  
Environmental Research ◽  
Noise Levels ◽  
Port Harcourt ◽  
Noise Barrier ◽  
Vegetal Cover

Noise pollution is an unwanted sound which degrades the quality of our environment  therefore, making the environment we live and work unpleasant for living. This situation is not different in Port Harcourt metropolis in the wake of increased human activities, which has   resulted to and accelerates noise level. This situation has led to the adoption of possible  measures to check noise levels using vegetal cover supported barriers. Hence, the need to examine environmental noise exposure attenuation using vegetal cover and its supported     barriers. Environmental research design was employed and a total of twelve samples were collected for each barrier types with the aid of the digital noise meter (EXTECH instrument    digital sound meter with RS232) to measure noise level in decibels (dBA). Findings revealed  that areas with bare surfaces across its property corridor witnessed did not decrease noise   levels at destination while surface with vegetation such as lawns within its property  boundary corridor witnessed reduced noise levels of destination. It is therefore, recommended    that vegetal surfaces walls should be encouraged to support erected noise barrier walls across    the urban space in the bid of attenuating urban noise and make urban regions/areas more habitable.

EFFICIENCY EVALUATION OF A NOISE BARRIER

2007 ◽  
Vol 15 (3) ◽  
pp. 125-134 ◽  
Author(s):  
Pranas Baltrėnas ◽  
Donatas Butkus ◽  
Vytautas Nainys ◽  
Raimondas Grubliauskas ◽  
Jurgita Gudaitytė
Keyword(s):  
Agricultural Production ◽  
Noise Level ◽  
Measuring Equipment ◽  
Rapid Expansion ◽  
Local People ◽  
Efficiency Evaluation ◽  
Traffic Flows ◽  
Human Comfort ◽  
Noise Barrier ◽  
Production Increase

Mechanization of industrial and agricultural production, increase of urban and rural traffic flows, modernization of domestic facilities cause a rapid expansion of acoustic discomfort zones. Since the noise level in any environment is one of the basic factors determining the human comfort indicator, investigation into noise processes is given special attention by researchers. Seaport freight discharge terminals are also connected with noise problems. Noise from AB KLASCO fertilizer discharge terminal of Klaipeda seaport cause great concern to local people. There is a noise barrier installed near the terminal. The present paper describes the efficiency evaluation of the noise barrier according to the noise level measurements performed, modelling of noise spread and mathematical calculations. The investigation was performed with noise measuring equipment Bruel&Kjaer mediator 2260. According to measurements, it is obvious that the noise level in the residential zone is 3–4 dBA above the limits (limits are given in HN 33–1:2003) in the daytime, and by 7 dBA at night. The modelling of noise spread was performed by CadnaA program which allowed to make different models according to variations of the noise level caused by changing conditions.

scholarly journals Noise Reduction Using Concrete Barriers: A Case Study

2021 ◽  
Vol 1197 (1) ◽  
pp. 012010
Author(s):  
A. K. Dasarathy ◽  
M. Tamil selvi
Keyword(s):  
Noise Reduction ◽  
Noise Pollution ◽  
Noise Attenuation ◽  
Noise Barriers ◽  
Innovative Design ◽  
Attenuation Effect ◽  
Traffic Conditions ◽  
Sound Barriers ◽  
Noise Barrier

Abstract Noise pollution is becoming more and more acute, and hence many researchers are studying the noise attenuation effect and prevention of noise. In this study an attempt has been made to find the reduction in noise levels at National Highway 45 near peerkankaranai in Chennai. Two sensitive places were selected along NH 45 by examining attenuation of noise by providing noise barriers in the form of concrete structures. The primary goal of this project was to identify innovative design of noise barrier that has the potential to be implemented in NH 45, Chennai. Based on the research and evaluation conducted for this study, it was recommended that two innovative barrier designs be implemented in Chennai. First, a noise prediction is made at the specified location on the highway under certain traffic conditions in order to determine the noise level by measurement and decide on the barrier requirement. The installation of sound barriers is feasible enough to cause a significant decrease in noise pollution at the roads. Considerable noise attenuation is achieved by providing concrete noise barrier. The paper provides Leq at the time of traffic data recorded was 105.1 dBA at NH45 and 91.108 dBA at NH5 during the time of observation at installation of barrier the values are 70.09 dBA 79.11 dBA, respectively. Noise reduction is possible and noise reduction is predominantly reduced by providing barrier.

The Status of Noise Pollution in the Major Traffic Intersections of Khulna Metropolitan City in Bangladesh and its Possible Effect on Noise-Exposed People

2020 ◽  
Vol 1 (5) ◽  
Author(s):  
Aliza Sultana ◽  
Ashok Kumar Paul ◽  
Meher Un Nessa
Keyword(s):  
Noise Level ◽  
Noise Pollution ◽  
Pressure Level ◽  
Pollution Level ◽  
Metropolitan City ◽  
Mixed Area ◽  
Commercial Area ◽  
Significant Difference ◽  
Traffic Intersections ◽  
The Status

This study was conducted in the Khulna metropolitan city to determine the status of noise pollution at major traffic intersections and assess the possible effect of noise on regular noise afflicted people. For this research, five busiest roadways and traffic intersections; two mixed zone and three commercial zones were selected purposively and 'ST-8850 Sound Level Meter' was used to record the noise pressure level. Average noise pressure level and some noise parameters (Leq, L10, L50, L90, and Lnp) were measured at different shifts in each location both on working days and holidays. The result evidently specified that noise level in all major traffic circles of Khulna metropolitan city was much higher than the recommended threshold of acceptable noise level set by the Department of Environment (DOE) of Bangladesh. It was observed that the mixed area (Sonadanga, Gollamari) tends to have a higher average noise level than those of the commercial area (Shibbari, Notunrasta, Dakbangla). The noise pollution level (Lnp) in mixed areas varied from 92.77 dB (A) to 104.74 dB(A) on working days and 86.9 dB(A) to 105.5 dB(A) on holidays. On working days, the highest Leq was observed 92.65 ± 4.15 dB(A) in Sonadanga (mixed area), whereas the lowest was 85.13 ± 2.83 dB(A) in Dakbangla (commercial area). However, on holidays the highest level of Leq was found 90.41 ± 2.25 dB(A) in Sonadanga, while the lowest levels were 80.43 ± 3.20 dB(A) in Dakbangla. One-way ANOVA with LSD post-hoc test results illustrated that on working days there was a significant difference between the noise pollution levels (NPL) in different shifts of day time (F = 8.412, p < .05). The respondents of the study area addressed that they were the most affected by annoyance (70%), headache (62%), and hearing loss (46%) due to regular exposure to the traffic noise. Therefore, it is recommended to enhance awareness regarding the cause and effect of noise pollution among the noise producers and oppressed people. Subsequently, administrative measures have to take to attenuate noise pollution and indemnify the quality health of the citizens.

The Determination of the Noise Pollution in a Production Hall and the Diseases Produced by It

2018 ◽  
Vol 69 (4) ◽  
pp. 875-880
Author(s):  
Oana Roxana Chivu ◽  
Ovidiu Mederle ◽  
Augustin Semenescu ◽  
Ileana Mates ◽  
Claudiu Babis ◽  
...  
Keyword(s):  
Risk Factor ◽  
Human Body ◽  
Noise Level ◽  
Noise Pollution ◽  
Protective Measures ◽  
Work Program ◽  
Specialized Equipment ◽  
Chemical Products ◽  
Main Activity

The paper describes how to determine the noise in a production hall where there are production machines and equipment. The chosen plant is a production unit where filling of the polyurethane foam tubes is performed. The main activity is the production of professional insulators and wholesale of other products from the same range enumerating the following: wholesale chemical products; production of professional insulators; trade in chemicals and chemical industry. The recommended maximum admissible value for a normal 8h work program is 85 dB (A). The objective is to determine the level of noise in the factory and how it acts as a physical professional risk factor and its effects on the human body. The way in which the proposed objective was achieved was to determine the value of the noise level with the specialized equipment. Following the determinations that will be presented in the following chapters, appropriate protective measures have been taken.

scholarly journals Eco-Environmental Aspects of COVID-19 Pandemic and Potential Control Strategies

2021 ◽  
Vol 18 (7) ◽  
pp. 3488
Author(s):  
Rashid Nazir ◽  
Jawad Ali ◽  
Ijaz Rasul ◽  
Emilie Widemann ◽  
Sarfraz Shafiq
Keyword(s):  
Control Strategies ◽  
Public Awareness ◽  
Noise Pollution ◽  
Environmental Aspects ◽  
Potential Control ◽  
Health Infrastructure ◽  
The People ◽  
Slum Dwellers ◽  
Hospital Wastes ◽  
Future Outbreak

A new coronavirus-strain from a zoonotic reservoir (probably bat)—termed as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)—has recently claimed more than two million deaths worldwide. Consequently, a burst of scientific reports on epidemiology, symptoms, and diagnosis came out. However, a comprehensive understanding of eco-environmental aspects that may contribute to coronavirus disease 2019 (COVID-19) spread is still missing, and we therefore aim to focus here on these aspects. In addition to human–human direct SARS-CoV-2 transmission, eco-environmental sources, such as air aerosols, different public use objects, hospital wastes, livestock/pet animals, municipal wastes, ventilation facilities, soil and groundwater potentially contribute to SARS-CoV-2 transmission. Further, high temperature and humidity were found to limit the spread of COVID-19. Although the COVID-19 pandemic led to decrease air and noise pollution during the period of lockdown, increased use of masks and gloves is threatening the environment by water and soil pollutions. COVID-19 badly impacted all the socio-economic groups in different capacities, where women, slum dwellers, and the people lacking social protections are the most vulnerable. Finally, sustainable strategies, waste management, biodiversity reclaim, eco-friendly lifestyle, improved health infrastructure and public awareness, were proposed to minimize the COVID-19 impact on our society and environment. These strategies will seemingly be equally effective against any future outbreak.

scholarly journals The optimum orientation of an absorbing barrier

2005 ◽  
Vol 461 (2060) ◽  
pp. 2369-2383 ◽  
Author(s):  
A.D Rawlins
Keyword(s):  
Noise Level ◽  
Noise Source ◽  
Shadow Region ◽  
Source Position ◽  
Absorbent Material ◽  
Noise Barrier ◽  
Receiver Point

In the following work, we solve the problem of the best orientation of a rigid noise barrier, which has one face lined with absorbent material, between a noise source and a receiver point in the shadow region of the barrier. By the ‘best orientation’, we mean that positioning of the barrier which yields the least noise level at the receiving point for a given barrier and source position.

Sign in / Sign up

Export Citation Format

Share Document