Field Measurements for Traffic Noise Reduction in Highway Tunnels Using Closed-Cell Aluminum Foam Board

In order to explore the sound absorption and noise reduction performance of closed-cell aluminum foam in the tunnel, the field test of the sound absorption performance of aluminum foam board was carried out based on the installation of aluminum foam board in the whole line of Haoshanyu Tunnel on Qinglan Expressway. Combined with the existing loudspeaker test and typical tunnel measurements, a new field test method for the noise reduction performance of closed-cell aluminum foam board was proposed for two different working conditions including fixed-point pure tone sound source condition and mobile vehicle sound source condition. The testing results of the new methods were analyzed, and it showed that the closed-cell aluminum foam has good sound absorption property at the frequency spectra between 250 Hz and 1000 Hz, and the farther away from the sound source, the better the sound absorption effect. In the research on the noise reduction effect of actual vehicle, it was found that the insertion loss of the closed-cell foam aluminum board is about 4 dB(A), which indicated that the closed-cell aluminum foam can play a certain noise reduction effect in the tunnel.

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Research for Noise Reduction Performance of Rubberized Asphalt Overlay

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.744-746.1335 ◽

2015 ◽

Vol 744-746 ◽

pp. 1335-1338 ◽

Cited By ~ 1

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.

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

Environmental and Earth Sciences Research Journal ◽

10.18280/eesrj.080206 ◽

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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Study on the Noise Reduction Effect of Sound Absorption Barrier in Different Frequency Bands

DEStech Transactions on Engineering and Technology Research ◽

10.12783/dtetr/icamm2016/7399 ◽

2017 ◽

Author(s):

Wen-Jun LUO ◽

Long CHENG

Keyword(s):

Noise Reduction ◽

Sound Absorption ◽

Frequency Bands ◽

Reduction Effect

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401 Influence of sound absorption structure on the noise reduction effect

The Proceedings of Conference of Kansai Branch ◽

10.1299/jsmekansai.2014.89._4-1_ ◽

2014 ◽

Vol 2014.89 (0) ◽

pp. _4-1_

Author(s):

Tomoya ASANO ◽

Toshifumi KUBOHORI

Keyword(s):

Noise Reduction ◽

Sound Absorption ◽

Reduction Effect

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Design and Theoretical Analysis of Acoustic Enclosure for G12V190 Type Diesel Engine

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.338.392 ◽

2011 ◽

Vol 338 ◽

pp. 392-395

Author(s):

Jin Sheng Ma ◽

Na Na Dai ◽

Yang Bo ◽

Ling Zhou ◽

Zi Feng Liu ◽

...

Keyword(s):

Diesel Engine ◽

Theoretical Analysis ◽

Theoretical Calculation ◽

Noise Reduction ◽

Field Test ◽

Test Results ◽

Reduction Effect

The existing acoustic cover is improved to reduce the noise of G12V190 type diesel engine. A panel of shutters structure is designed and simulated with SYSNOISE. The structure of acoustic enclosure is also been designed according to the structure of the diesel engine. Theoretical calculation shows that the improved insulation cover has not only a good noise reduction effect, but also has been greatly improved in terms of cooling ventilation, the field test results also shows that this section of acoustic enclosure can reduce the noise about 10dB.

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Study on Influencing Factors of Noise Reduction Performance of Pervious Concrete

Materials Science Forum ◽

10.4028/www.scientific.net/msf.971.106 ◽

2019 ◽

Vol 971 ◽

pp. 106-113

Author(s):

Ji Liang Wang ◽

Zi Dong Niu ◽

Qian Chen ◽

Yong Yan Yu ◽

Xiao Chen

Keyword(s):

Absorption Coefficient ◽

Noise Reduction ◽

Influencing Factors ◽

Coating Thickness ◽

Sound Absorption ◽

Pervious Concrete ◽

Absorption Coefficients ◽

Reduction Function ◽

Reduction Effect ◽

Technical Basis

In this experiment, four kinds of pervious concrete with different porosity (10%, 15%, 20%, 25%), four kinds of paste coating thickness (0.3mm, 0.5mm, 0.7mm, 0.9mm) and four kinds of thickness (30mm, 40mm, 50mm, 60mm) were prepared and their sound absorption coefficients under different frequency bands were tested. The results show that with the increase of target porosity, the thickness of paste coating and the thickness of pervious concrete, the sound absorption coefficient of pervious concrete increases firstly and then decreases. Through comprehensive consideration, when the target porosity is 18%, the thickness of paste coating is 0.5mm and the thickness is 40mm, pervious concrete has the best noise reduction effect. It provides a technical basis for the design of pervious concrete with noise reduction function.

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