noise barrier
Recently Published Documents


TOTAL DOCUMENTS

381
(FIVE YEARS 99)

H-INDEX

18
(FIVE YEARS 3)

2022 ◽  
Vol 355 ◽  
pp. 02061
Author(s):  
Jiang Li ◽  
YongBin Li ◽  
Jinhua Tan ◽  
Zhimin Yang

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.


2021 ◽  
Author(s):  
◽  
Jonathan Lim

<p>As urban regions increase in population and density, the need for quietness and spaces of relative calm becomes important to inhabitants’ physiological and psychological health and wellbeing. Noises, and the sounds that create them, are treated as a by-product of urban densification and the advancement of technology. This led to uncontrolled and incidental acoustic environments around notable points of urban densification. Each sound adds together in the acoustic environment to create a composition that is labelled collectively as noise. Those in the professions of planning and designing these urban environments have a responsibility to become the composers of the grand aural experience that is the worldly soundscape.  In response to this design problem, this portfolio explored how architecture can be designed to enable this sustainable densification of noisy urban environments. It proposed the incorporation of psychoacoustics and R. Murray Schafer’s soundscape philosophy (and ongoing related research) into acoustic design. By understanding the complex creation of the aural experience, this portfolio investigated whether the key to living healthily and sustainably in an inevitably sound-filled urban environment laid in the design of soundscape as a perceptual construct.  The investigation translated relevant literature into broad explorations of soundscape design elements at a variety of architectural scales. Using soundscape principles in a design process produced a strong architectural proposition that could solve both densification and acoustic problems. This had widespread and profound implications on architectural design practices. The portfolio therefore prompts further explorations into soundscape design for other architectural problems and applications.</p>


2021 ◽  
Author(s):  
◽  
Jonathan Lim

<p>As urban regions increase in population and density, the need for quietness and spaces of relative calm becomes important to inhabitants’ physiological and psychological health and wellbeing. Noises, and the sounds that create them, are treated as a by-product of urban densification and the advancement of technology. This led to uncontrolled and incidental acoustic environments around notable points of urban densification. Each sound adds together in the acoustic environment to create a composition that is labelled collectively as noise. Those in the professions of planning and designing these urban environments have a responsibility to become the composers of the grand aural experience that is the worldly soundscape.  In response to this design problem, this portfolio explored how architecture can be designed to enable this sustainable densification of noisy urban environments. It proposed the incorporation of psychoacoustics and R. Murray Schafer’s soundscape philosophy (and ongoing related research) into acoustic design. By understanding the complex creation of the aural experience, this portfolio investigated whether the key to living healthily and sustainably in an inevitably sound-filled urban environment laid in the design of soundscape as a perceptual construct.  The investigation translated relevant literature into broad explorations of soundscape design elements at a variety of architectural scales. Using soundscape principles in a design process produced a strong architectural proposition that could solve both densification and acoustic problems. This had widespread and profound implications on architectural design practices. The portfolio therefore prompts further explorations into soundscape design for other architectural problems and applications.</p>


Computation ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 129
Author(s):  
Mihai Bugaru ◽  
Ovidiu Vasile ◽  
Marian Neagoe

The aim of this research is to provide a better prediction for noise attenuation using thin rigid barriers. In particular, the paper presents an analysis on four methods of computing the noise attenuation using acoustic barriers: Maekawa-Tatge formulation, Kurze and Anderson algorithm, Menounou formulation, and the general prediction method (GPM-ISO 9613). Accordingly, to improve the GPM, the prediction computation of noise attenuation was optimized for an acoustic barrier by considering new effects, such as attenuation due to geometrical divergence, ground absorption-reflections, and atmospheric absorption. The new method, modified GPM (MGPM), was tested for the optimization of an y-shape edge geometry of the noise barrier and a closed agreement with the experimental data was found in the published literature. The specific y-shape edge geometry of the noise barrier contributes to the attenuation due to the diffraction phenomena. This aspect is based on the Kirchhoff diffraction theory that contains the Huygens-Fresnel theory, which is applied to a semi-infinite acoustic barrier. The new method MGPM of predicting the noise attenuation using acoustic barriers takes into consideration the next phenomena: The effect of the relative position of the receiver, the effect of the proximity of the source or receiver to the midplane of the barrier, the effect of the proximity of the receiver to the shadow boundary, the effect of ground absorption-reflections, the effect of atmospheric absorption, and the meteorological effect due to downwind. The conclusion of the paper reveals the optimization of the method for computing the noise attenuation using acoustic barriers, including the necessary corrections for ISO-9613 and the Sound PLAN software, as well as the optimization on a case study of a specific geometry of the edge barrier.


Minerals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1221
Author(s):  
Hanna Jaworska ◽  
Joanna Klimek

The distribution of Hg in the vicinity of roads is probably not exclusively dependent on car emissions, but also on the presence of other point or diffuse sources of Hg emissions located from metres to several km away. The source of mercury in urbanised areas is pollution derived from the burning of fuels and industrial and transport waste, while in agricultural areas, it is constituent in mineral fertilisers and crop protection products. The research objective was to evaluate the content and spatial distribution of mercury in arable soils adjacent to the A1 motorway in Poland. The research material consisted of 40 soil samples taken from 20 test points on four transects at distances of 5, 10, 25 and 50 m from a noise barrier and in the direction of an arable field, and 10 m from the noise barrier in the direction of the motorway. Total mercury content was determined by atomic absorption spectrometry using an AMA 254 analyser. The spatial relationship between adjacent observations of variables was assessed using Moran’s I overall autocorrelation coefficient. Probability maps of mercury distribution in the field and pollution indicators were elaborated in ArcGIS 10.4.1. using Inverse Distance Weighted interpolation. Analysis of the spatial correlation of Moran’s I showed a lack of spatial dependence between tested points, which may evidence that the motorway does not affect mercury contents in the soil. The elevated mercury content at a single test point may indicate a random event unrelated to the motorway’s operation.


2021 ◽  
Vol 323 ◽  
pp. 129169
Author(s):  
Mariam Abdulkareem ◽  
Jouni Havukainen ◽  
Jutta Nuortila-Jokinen ◽  
Mika Horttanainen

2021 ◽  
Vol 1197 (1) ◽  
pp. 012010
Author(s):  
A. K. Dasarathy ◽  
M. Tamil selvi

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.


2021 ◽  
Vol 11 (21) ◽  
pp. 10206
Author(s):  
Alžbeta Pultznerová ◽  
Ján Šimo ◽  
Juraj Grenčík

This paper presents environmental acute problems from increasing noise levels caused by automobile and rail transport. Noise barriers are considered to be an effective element in reducing noise in densely populated urban areas. However, do these barriers have the correct height, shape, material design, and construction? In the materials and methods, the basic characteristics of noise barrier, sound absorption, and sound insulation are described. Further, measurement methods of the insertion loss of outdoor noise barriers of all types using the direct and indirect method according to standard ISO 10847 and the Adrienne method according to standards EN 1793-5 and EN 1793-6 are presented. The measurement results of insertion loss of the selected noise barrier obtained by the indirect method showed a value of 19.1 dB(A) of insertion loss. This result was compared with simulation by our own software based on the CNOSSOS methodology, giving value of 19.6 dB(A), which is a good correlation. The Adrienne method was used for determination of the airborne sound insulation index of another noise barrier, giving a value of the single-number rating of the sound insulation of the barrier of 28 dB. In discussion, according to EN 1793-2, this value assigns an insulation index of category D3, which means that the barrier is high quality and has satisfactory airborne sound insulation. The advantages and disadvantages of both methods according to STN ISO 10847 and STN EN 1793-6 were discussed. We concluded that the main advantage of the method Adrienne—TN EN 1793-6 is that it can be used in situ under direct sound field conditions and can directly evaluate the sound insulation index of the whole barrier structure.


Sign in / Sign up

Export Citation Format

Share Document