The Potential for Traffic Noise Reduction by Thin Masonry Panels

2009 ◽  
pp. 366-366-12
Author(s):  
ML Mehta
Keyword(s):  
Noise Reduction ◽  
Traffic Noise

Asphalt wearing course optimization for road traffic noise reduction

2017 ◽  
Vol 152 ◽  
pp. 345-356 ◽  
Author(s):  
Audrius Vaitkus ◽  
Tadas Andriejauskas ◽  
Viktoras Vorobjovas ◽  
Aleksandras Jagniatinskis ◽  
Boris Fiks ◽  
...  
Keyword(s):  
Noise Reduction ◽  
Road Traffic ◽  
Traffic Noise ◽  
Road Traffic Noise

Noise reduction of enhanced acoustic balconies on a high-rise building block

2021 ◽  
Vol 263 (1) ◽  
pp. 5327-5334
Author(s):  
SK Tang ◽  
Rudolf YC Lee
Keyword(s):  
Noise Reduction ◽  
Natural Ventilation ◽  
Traffic Noise ◽  
Elevation Angle ◽  
Noise Levels ◽  
Indoor Space ◽  
New Device ◽  
Air Inlet ◽  
The Difference ◽  
The Impact

A new device called 'enhanced acoustic balcony' is installed in a new housing estate in Hong Kong. It is intended to help reduce the impact of traffic noise on the residents. This balcony is basically an enlarged form of a plenum window and with three openings. Apart from the outdoor air inlet, there is the balcony door and a side-hung window on the interior balcony wall for natural ventilation of the indoor space. Sound absorption of NRC 0.7 is installed on the balcony ceiling and its sidewall facing the incoming traffic noise and an inclined panel is installed outside the balcony to provide noise screening. A site measurement of its noise reduction is carried out in the present study in a newly completed housing block. A 28 m long loudspeaker array is used as the sound source. The indoor noise levels are measured according to ISO standard. The results show that the difference between indoor and outdoor noise levels in the presence of this balcony form varies over a relatively narrow range between 10 to 13 dBA for an elevation angle from 25 to 60 deg. There is a weak increase of the noise level difference with elevation angle.

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.

scholarly journals Exploiting ground effects for surface transport noise abatement

Noise Mapping ◽  
2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Keith Attenborough ◽  
Imran Bashir ◽  
Shahram Taherzadeh
Keyword(s):  
Noise Reduction ◽  
Traffic Noise ◽  
Square Lattice ◽  
Artificial Roughness ◽  
Noise Mitigation ◽  
Noise Abatement ◽  
Surface Transport ◽  
Lattice Design ◽  
Parallel Wall ◽  
Ground Effects

AbstractGrowing demand on transportation, road and railway networks has increased the risk of annoyance from these sources and the need to optimise noise mitigation. The potential traffic noise reduction arising from use of acoustically-soft surfaces and artificial roughness (0.3 m high or less) is explored through laboratory experiments, outdoor measurements at short and medium ranges and predictions. Although the applicability of ground treatments depends on the space usable for the noise abatement and the receiver position, replacing acousticallyhard ground by acoustically-soft ground without or with crops and introducing artificial roughness configurations could achieve noise reduction along surface transport corridors without breaking line of sight between source and receiver, thereby proving useful alternatives to noise barriers. A particularly successful roughness design has the form of a square lattice which is found to offer a similar insertion loss to regularly-spaced parallel wall arrays of the same height but twice the width. The lattice design has less dependence on azimuthal source-receiver angle than parallel wall configurations.

scholarly journals Facade structures design and their impact on traffic noise reduction

Tehnika ◽  
2014 ◽  
Vol 69 (6) ◽  
pp. 925-930
Author(s):  
Jasmina Radosavljevic ◽  
Ana Vukadinovic
Keyword(s):  
Noise Reduction ◽  
Traffic Noise

scholarly journals Noise Reduction Effect of Porous Asphalt Pavement Based on Acoustic-Structure Coupling Model

2021 ◽  
Vol 8 (2) ◽  
pp. 97-102
Author(s):  
Jiakun Yang ◽  
Zhou Qiu ◽  
Chuanfeng Zheng
Keyword(s):  
Noise Reduction ◽  
Sound Absorption ◽  
Asphalt Pavement ◽  
Traffic Noise ◽  
Coupling Model ◽  
Comsol Multiphysics ◽  
Acoustic Structure ◽  
Porous Asphalt ◽  
Reduction Effect ◽  
Pore Depth

Nowadays, the traffic noise problem is becoming increasingly prominent. In order to study the influence of porosity and pore depth on the noise reduction performance of asphalt pavement, this paper used the software COMSOL Multiphysics to establish acoustic-structure coupling models, and simulated the sound absorption and noise reduction effect of asphalt pavement under 10%, 15%, 20%, 25%, and 30% porosity; moreover, under the condition of unchanged asphalt pavement porosity, the sound absorption and noise reduction effect of asphalt pavement under 3cm, 4cm, 5cm, 6cm, and 7cm pore depth was studied as well. The research results reveal that, with the increase of porosity and pore depth, the sound absorption and noise reduction effect of asphalt pavement gets better.

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