scholarly journals Key Points of Acoustic Consultation for Highway Noise barrier Design Optimization

2020 ◽  
Vol 145 ◽  
pp. 02008
Author(s):  
Shufang Huang ◽  
Zhiqiang Sun ◽  
Huan Liu ◽  
Yanqin Wang ◽  
Minmin Yuan
Keyword(s):  
Noise Reduction ◽  
Traffic Noise ◽  
Pollution Prevention ◽  
Noise Pollution ◽  
Acoustic Environment ◽  
Technical Requirements ◽  
Prevention Project ◽  
Noise Barrier ◽  
Reducing Costs ◽  
The Cost

Noise barrier treatment is a traffic noise pollution prevention project. Many domestic residents along high-grade highways are densely distributed and there are many sensitive points in the acoustic environment. Traffic noise will have a large environmental impact along the route. The design of the noise barrier from the EIA stage to the construction stage is inconsistent with the actual situation. Therefore, in order to improve and optimize the noise reduction measures along the line and reasonably control the cost of the noise barrier project, many should be optimized. We shoud clarify the noise barrier installation location, scale, acoustic material technical requirements, standards, and engineering cost estimates, focusing on the principle of no reduction in noise reduction, strong operability, and economical practicality, in order to highlight the purpose of reducing costs and increasing efficiency.

scholarly journals Optimized design research of fully enclosed noise barrier

2022 ◽  
Vol 355 ◽  
pp. 02061
Author(s):  
Jiang Li ◽  
YongBin Li ◽  
Jinhua Tan ◽  
Zhimin Yang
Keyword(s):  
Design Research ◽  
Traffic Noise ◽  
Noise Pollution ◽  
Optimized Design ◽  
High Rise ◽  
Noise Barrier ◽  
The Cost ◽  
Technical Solutions ◽  
And Control ◽  
Control Traffic

Fully enclosed noise barrier has been used to prevent and control traffic noise pollution because of its effectiveness. It has become the best solution for controlling environmental noise of high-rise buildings from expressways, urban viaducts and railways that cross the crowded downtown area. However, its high cost has become an important retarding factor on its application and popularization, so reducing the cost become an urgent problem. The research theory, structure frame, sound absorbing and insulating materials are investigated for the fully enclosed noise barrier, so as to provide technical solutions for optimizing the design scheme and reducing the construction cost.

Research for Noise Reduction Performance of Rubberized Asphalt Overlay

2015 ◽  
Vol 744-746 ◽  
pp. 1335-1338 ◽  
Author(s):  
Hong Bo Zhang ◽  
Hua Tan
Keyword(s):  
Noise Reduction ◽  
Road Traffic ◽  
Traffic Noise ◽  
Noise Pollution ◽  
Test Method ◽  
Good Effect ◽  
Road Traffic Noise ◽  
Asphalt Overlay ◽  
Sources Of Pollution ◽  
Reduction Effect

In the environment of noise pollution, the noise of pavement is one of the main sources of pollution. It has serious impact on the natural and social environment and interference with people's learning and work. The research shows that the tire or road noise will be a major part of the traffic noise when the car speed is greater than 30km/h and the truck speed is greater than 50km/h [1]. This paper analyzes the status quo of study of rubber asphalt overlay noise reduction and mechanism. Through effective traffic noise test method, we have analysis the noise reduction effect of rubber asphalt overlay. Results of the study shows that rubber asphalt overlay can well reduce road traffic noise and it has a good effect of improving the comfort of driving.

Assessment of Noise Pollution of Kolkata Metro Railway System and Its Impact on Urban Receptors A Case Study

2020 ◽  
Vol 8 (11) ◽  
pp. 1-13
Author(s):  
Argha Kamal Guha ◽  
Anirban Kundu Chowdhury ◽  
Anupam Debsarkar ◽  
Shibnath Chakrabarty
Keyword(s):  
Traffic Noise ◽  
Weighted Average ◽  
Noise Pollution ◽  
Strong Relationship ◽  
Mean Value ◽  
Noise Index ◽  
Plot Analysis ◽  
Study Results ◽  
Noise Barrier ◽  
Railway System

An assessment of noise quality was conducted at underground and overground metro stations, within the metro rakes (AC and Non-AC) and at an institutional building near elevated metro corridor to assess the exposure of Kolkata Metro Railway System. The present study was conducted in different hours (peak and non-peak hour) for different types of rake (AC and Non-AC) movement. Different noise descriptors including A-weighted equivalent noise (Leq), statistical noise (L10,L50,L90), noise climate (NC), traffic noise index (TNI), two hour noise dose (%ND) and corresponding time-weighted average (TWA) were calculated under the purview of the present study. Pearson’s correlation was performed between all noise descriptors to investigate the relation between them. Scatter plot analysis was conducted between L10 and %ND. In case of all study duration, all noise descriptors mostly exceeded FTA prescribed noise standard, along with 2-hr TWA which exceeded the OSHA guidelines of 100 dB for both AC and Non-AC rakes. On the other hand, at underground and overground metro stations, within metro rakes (except at day peak hour within AC coach) and at school building, mean value of traffic noise index (TNI) exceeded 74 dB (A), the threshold of over criterion. The study results indicate that Non-AC rakes are more annoying than AC-rakes. In all the study units, Leq was influenced by L10, which originates from pressure honking. There is very strong relationship observed between L10 and % ND. This study proposes that noise barrier should be installed at underground and overground metro stations, along the stretches of overground metro track, within metro rakes for developing the acoustic quality of Kolkata Metro Railway System and the areas of its immediate vicinity.

scholarly journals Flexible Ceramic Nanofibrous Aerogels with Hierarchically Entangled Graphene Networks Enable Full-Frequency Noise Absorption

2021 ◽  
Author(s):  
Dingding Zong ◽  
Leitao Cao ◽  
Xia Yin ◽  
Yang Si ◽  
Shichao Zhang ◽  
...  
Keyword(s):  
Noise Reduction ◽  
Global Economy ◽  
Dimensional Space ◽  
Traffic Noise ◽  
Three Dimensional ◽  
Hierarchical Structures ◽  
Noise Pollution ◽  
Frequency Noise ◽  
Fibrous Materials ◽  
Noise Absorption

Abstract Traffic noise pollution has posed a huge burden to the global economy, ecological environment, and human health. However, most present traffic noise reduction materials suffer from a narrow absorbing band, high weights, and poor temperature resistance. Here, we demonstrate a facile strategy to create flexible ceramic nanofibrous aerogels (GCNAs) with hierarchically entangled graphene networks, which integrate unique hierarchical structures of opened cells, closed-cell walls, and entangled networks. Under the precondition of independent of chemical crosslinking, high enhancement in buckling and compression performances of GCNAs is achieved by forming hierarchically entangled structures in all three-dimensional space. Moreover, the flexible GCNAs show striking full-frequency noise absorption performances (noise reduction coefficient of 0.56 in 63~6300 Hz) and lightweight features (9.3 mg cm-3), together with robust temperature-invariant stability in –100~500 °C. This strategy paves the way for the design of novel fibrous materials for highly efficient full-frequency noise absorption.

scholarly journals Flexible ceramic nanofibrous sponges with hierarchically entangled graphene networks enable noise absorption

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Dingding Zong ◽  
Leitao Cao ◽  
Xia Yin ◽  
Yang Si ◽  
Shichao Zhang ◽  
...  
Keyword(s):  
Noise Reduction ◽  
Global Economy ◽  
Dimensional Space ◽  
Traffic Noise ◽  
Three Dimensional ◽  
Hierarchical Structures ◽  
Noise Pollution ◽  
Broadband Noise ◽  
Fibrous Materials ◽  
Noise Absorption

AbstractTraffic noise pollution has posed a huge burden to the global economy, ecological environment and human health. However, most present traffic noise reduction materials suffer from a narrow absorbing band, large weight and poor temperature resistance. Here, we demonstrate a facile strategy to create flexible ceramic nanofibrous sponges (FCNSs) with hierarchically entangled graphene networks, which integrate unique hierarchical structures of opened cells, closed-cell walls and entangled networks. Under the precondition of independent of chemical crosslinking, high enhancement in buckling and compression performances of FCNSs is achieved by forming hierarchically entangled structures in all three-dimensional space. Moreover, the FCNSs show enhanced broadband noise absorption performance (noise reduction coefficient of 0.56 in 63–6300 Hz) and lightweight feature (9.3 mg cm–3), together with robust temperature-invariant stability from –100 to 500 °C. This strategy paves the way for the design of advanced fibrous materials for highly efficient noise absorption.

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.

Traffic noise models and noise guidelines: A review

2021 ◽  
pp. 095745652110526
Author(s):  
Fidelma Ibili ◽  
Emmanuel K. Adanu ◽  
Charles A. Adams ◽  
Samuel A. Andam-Akorful ◽  
Simeon S. Turay ◽  
...  
Keyword(s):  
Computational Models ◽  
Traffic Noise ◽  
Noise Pollution ◽  
Noise Modeling ◽  
Body Of Knowledge ◽  
The World ◽  
The Cost ◽  
Road Characteristics ◽  
Noise Models ◽  
Different Parts

Traffic noise is a major cause of noise pollution, and impacts of noise pollution on humans have been studied extensively. Previous studies have helped in the development of traffic noise prediction analysis using robust analytical and computational models, parameters connected with traffic, road characteristics, and environment. This study reviewed 11 traffic noise modeling strategies and parameters used by various agencies in different parts of the world. Seven out of the 11 models reviewed in this paper were based on outdoor measurements while the remaining four were based on outdoor and indoor measurements. Considering the cost and time involved in developing these models, there is need to understand existing traffic noise models, differences, and assumptions before adopting or recalibrating them for local demands. This study contributes to the larger body of knowledge and intends to serve as a reference material for future researchers in the area of traffic noise modeling and techniques.

Pengaruh bising lalu lintas terhadap penurunan fungsi pendengaran pada juru parkir di kota Denpasar

2013 ◽  
Vol 40 (2) ◽  
Author(s):  
Ni Ketut Susilawati ◽  
Wayan Sudana ◽  
Eka Putra Setiawan
Keyword(s):  
Hearing Impairment ◽  
Noise Exposure ◽  
Traffic Noise ◽  
Hearing Threshold ◽  
Noise Pollution ◽  
Simple Random Sampling ◽  
Cross Sectional Study ◽  
Control Group ◽  
Cross Sectional ◽  
Hearing Function

Background: Noise pollution or noise is an unwanted sound which is disturbing to human beings.However small or soft the sound, if it is undesirable it is considered as noise. Noise induced hearingloss is a sensorineural hearing loss that is commonly encountered second to presbycusis. Purpose: Toknow the effect of traffic noise exposure on hearing impairment to the employees of the Parking DistrictCompany of the Denpasar city and to improve diagnostic detection on hearing impairment caused bynoise. Method: A cross sectional study was conducted at the Parking District Company office. Thepopulations of this study were the employees of the Parking District Company. Samples of this study were the employees who were exposed to traffic noise and control samples were an employee who was unexposed. Samples were selected by simple random sampling. Results: From 40 parking attendants,27 persons (67.5%) aged above 35 years old. The parking attendants who had been working for ten to fifteen years were 36 persons (90%) and no history using ear protection when working. Seven persons(17.5%) had referred DPOAE upon examination with increase hearing threshold on audiogram result.In this study the parking attendants who had hearing deficit induced by noise were 7 persons (17.5%)and only one person (2.5%) in control group. There was a statistically significant effect of traffic noiseto hearing function deficit (p<0.05). Conclusion: Traffic noise has effect in hearing function deficit onthe parking attendants.ORLI Vol. 40 No. 2 Tahun 2010Key words: NIHL, parking attendant, audiometry, DPOAE.

scholarly journals Traffic noise disrupts vocal development and suppresses immune function

2021 ◽  
Vol 7 (20) ◽  
pp. eabe2405
Author(s):  
Henrik Brumm ◽  
Wolfgang Goymann ◽  
Sébastien Derégnaucourt ◽  
Nicole Geberzahn ◽  
Sue Anne Zollinger
Keyword(s):  
Immune Function ◽  
Noise Exposure ◽  
Traffic Noise ◽  
Vocal Learning ◽  
Noise Pollution ◽  
Experimental Models ◽  
Speech Development ◽  
Vocal Development ◽  
Learning Impairments ◽  
Cognitive Deficiencies

Noise pollution has been linked to learning and language deficits in children, but the causal mechanisms connecting noise to cognitive deficiencies remain unclear because experimental models are lacking. Here, we investigated the effects of noise on birdsong learning, the primary animal model for vocal learning and speech development in humans. We found that traffic noise exposure retarded vocal development and led to learning inaccuracies. In addition, noise suppressed immune function during the sensitive learning period, indicating that it is a potent stressor for birds, which is likely to compromise their cognitive functions. Our results provide important insights into the consequences of noise pollution and pave the way for future studies using birdsong as an experimental model for the investigation of noise-induced learning impairments.

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