Diffusion coef?cient : measurement apparatus and achieved results

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Diffusion coef?cient : measurement apparatus and achieved results

Popis výsledku v původním jazyce

Materials used in civil engineering for room acoustic treatment are often characterized with practical or weighted absorption coefficient which refers to material's ability to absorb sound energy. Another important property of acoustic materials is the amount of scattering of incident sound. Research in terms of expression, simulation and measurement of scattering sound on diffuse structures is a topical issue nowadays (2012). Based on the results of foreign research groups (ie University of Salford, prof. Trevor Cox) the research team of SONING Praha had assembled a measurement chain to determine the scattering of acoustic energy reflected from a sample surface under test. A software tool to process acquired data was also developed. The results are expressed in the form of polar plots as well as the frequency function of diffusion coefficient. Details on the measurement chain assembly and SW data processing tool development are briefly stated in the paper. The process of actual measurement is described and achieved results are discussed. Works on the improvement of measurement apparatus and SW tool for effective interior acoustic diffuser design are in progress at present.

Název v anglickém jazyce

Diffusion coef?cient : measurement apparatus and achieved results

Popis výsledku anglicky

Materials used in civil engineering for room acoustic treatment are often characterized with practical or weighted absorption coefficient which refers to material's ability to absorb sound energy. Another important property of acoustic materials is the amount of scattering of incident sound. Research in terms of expression, simulation and measurement of scattering sound on diffuse structures is a topical issue nowadays (2012). Based on the results of foreign research groups (ie University of Salford, prof. Trevor Cox) the research team of SONING Praha had assembled a measurement chain to determine the scattering of acoustic energy reflected from a sample surface under test. A software tool to process acquired data was also developed. The results are expressed in the form of polar plots as well as the frequency function of diffusion coefficient. Details on the measurement chain assembly and SW data processing tool development are briefly stated in the paper. The process of actual measurement is described and achieved results are discussed. Works on the improvement of measurement apparatus and SW tool for effective interior acoustic diffuser design are in progress at present.

Druh

D - Stať ve sborníku

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

2012

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings : European Conference on Noise Control (EURONOISE 2012)

ISBN

978-80-01-05013-2

ISSN

2226-5147

e-ISSN

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Počet stran výsledku

6

Strana od-do

1172-1177

Název nakladatele

European Acoustics Association

Místo vydání

Prague

Místo konání akce

Praha, Česká republika

Datum konání akce

10. 6. 2012

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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