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    A Simplified Method to Calculate the Acoustic Pressure of Three-Dimensional Finite-Length Noise Barriers

    Source: Journal of Highway and Transportation Research and Development (English Edition):;2013:;Volume ( 007 ):;issue: 003
    Author:
    Wang Li-jun
    ,
    Guo Ping
    DOI: 10.1061/JHTRCQ.0000339
    Publisher: American Society of Civil Engineers
    Abstract: To predict the performance of three-dimensional (3D) finite-length noise barriers, a simplified method is presented to calculate the acoustic pressure of noise barriers by a theoretical approach. Based on noise diffraction theory and acoustic calculations of two-dimensional barriers, the proposed method considers diffraction around 3D barriers. This method can calculate the acoustic pressure of a one-sided noise barrier and parallel noise barriers. Comparisons are made by the fast multipole boundary element method using Virtual. Lab software. The simulation results show that the acoustic pressure and curve tendency are in very good agreement in the frequency range from 20 to 2,000 Hz. When calculating the acoustic pressure of a one-sided barrier, the absolute error is 1.95 dB and the relative error is 2.98%. When calculating the acoustic pressure of parallel barriers, the absolute error is 2.43 dB and the relative error is 3.75%. These results prove the accuracy of the simplified method. Compared with other complicated methods, the simplified method does not require integrals and is easier to perform and more useful. This method can be used to study and design 3D finite-length noise barriers.
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      A Simplified Method to Calculate the Acoustic Pressure of Three-Dimensional Finite-Length Noise Barriers

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    http://yetl.yabesh.ir/yetl1/handle/yetl/70909
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    contributor authorWang Li-jun
    contributor authorGuo Ping
    date accessioned2017-05-08T22:05:14Z
    date available2017-05-08T22:05:14Z
    date copyrightSeptember 2013
    date issued2013
    identifier otherjhtrcq%2E0000339.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/70909
    description abstractTo predict the performance of three-dimensional (3D) finite-length noise barriers, a simplified method is presented to calculate the acoustic pressure of noise barriers by a theoretical approach. Based on noise diffraction theory and acoustic calculations of two-dimensional barriers, the proposed method considers diffraction around 3D barriers. This method can calculate the acoustic pressure of a one-sided noise barrier and parallel noise barriers. Comparisons are made by the fast multipole boundary element method using Virtual. Lab software. The simulation results show that the acoustic pressure and curve tendency are in very good agreement in the frequency range from 20 to 2,000 Hz. When calculating the acoustic pressure of a one-sided barrier, the absolute error is 1.95 dB and the relative error is 2.98%. When calculating the acoustic pressure of parallel barriers, the absolute error is 2.43 dB and the relative error is 3.75%. These results prove the accuracy of the simplified method. Compared with other complicated methods, the simplified method does not require integrals and is easier to perform and more useful. This method can be used to study and design 3D finite-length noise barriers.
    publisherAmerican Society of Civil Engineers
    titleA Simplified Method to Calculate the Acoustic Pressure of Three-Dimensional Finite-Length Noise Barriers
    typeJournal Paper
    journal volume7
    journal issue3
    journal titleJournal of Highway and Transportation Research and Development (English Edition)
    identifier doi10.1061/JHTRCQ.0000339
    treeJournal of Highway and Transportation Research and Development (English Edition):;2013:;Volume ( 007 ):;issue: 003
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian