Calculation of the Sound Attenuation by a Noise Barrier in Homogeneous Conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F14%3A00219875" target="_blank" >RIV/68407700:21110/14:00219875 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Calculation of the Sound Attenuation by a Noise Barrier in Homogeneous Conditions

Popis výsledku v původním jazyce

The purpose of this paper is to present an algorithm for the calculation of the sound attenuation caused by a thin straight noise barrier in homogeneous conditions of sound propagation. The development of the algorithm was done with the boundary elementmethod (the BEM) and the least squares method. The BEM was used to obtain the data, i.e. to calculate the sound attenuation by a noise barrier in different situations. The curve fitting was processed in Matlab with the tool for non-linear curve fitting tasks in the least square sense. The curve fitting was done for 1/1 octave band centre frequencies usually considered in the road traffic noise. The new algorithm was compared with commonly used engineering methods (NMPB-Routes-1996, formula of Kurze & Anderson and Deygout's method). The values of the sound attenuation estimated by the presented algorithm are except low frequencies lower than the values calculated by Deygout and higher than the values calculated by NMPB-Routes-1996 and Ku

Název v anglickém jazyce

Calculation of the Sound Attenuation by a Noise Barrier in Homogeneous Conditions

Popis výsledku anglicky

The purpose of this paper is to present an algorithm for the calculation of the sound attenuation caused by a thin straight noise barrier in homogeneous conditions of sound propagation. The development of the algorithm was done with the boundary elementmethod (the BEM) and the least squares method. The BEM was used to obtain the data, i.e. to calculate the sound attenuation by a noise barrier in different situations. The curve fitting was processed in Matlab with the tool for non-linear curve fitting tasks in the least square sense. The curve fitting was done for 1/1 octave band centre frequencies usually considered in the road traffic noise. The new algorithm was compared with commonly used engineering methods (NMPB-Routes-1996, formula of Kurze & Anderson and Deygout's method). The values of the sound attenuation estimated by the presented algorithm are except low frequencies lower than the values calculated by Deygout and higher than the values calculated by NMPB-Routes-1996 and Ku

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BI - Akustika a kmity

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Akustika

ISSN

1801-9064

e-ISSN

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Svazek periodika

22

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

6

Strana od-do

6-11

Kód UT WoS článku

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EID výsledku v databázi Scopus

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