Sound Absorption Coefficient of Porous Ceramic Materials.

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

Sound Absorption Coefficient of Porous Ceramic Materials.

Popis výsledku v původním jazyce

The sound absorption coefficient of composite samples made from the ceramic particulate material Liapor in a polybutadiene adhesive matrix was investigated by varying the particle size and thickness of the samples. Tests were performed with three different fractions of Liapor, with particle size varying from 0 to 2 mm, 2 to 4 mm and 0 to 4 mm. From each fraction, planar samples having relative thicknesses of 20, 30, 40, and 50 mm were prepared. For each sample, the sound absorption characteristics wereobtained using a B&K model 4206 two-microphone impedance tube. The testing system allowed the sound absorption coefficient to be measured for a wave normal to the absorber plane with a frequency in the range of 50 to 6400 Hz. The effects of thickness, density, and particle size of samples on the sound absorption coefficient were observed. By lowering the particle size and by increasing the sample thickness the absorption characteristics were improved. The composite made from smaller part

Název v anglickém jazyce

Sound Absorption Coefficient of Porous Ceramic Materials.

Popis výsledku anglicky

The sound absorption coefficient of composite samples made from the ceramic particulate material Liapor in a polybutadiene adhesive matrix was investigated by varying the particle size and thickness of the samples. Tests were performed with three different fractions of Liapor, with particle size varying from 0 to 2 mm, 2 to 4 mm and 0 to 4 mm. From each fraction, planar samples having relative thicknesses of 20, 30, 40, and 50 mm were prepared. For each sample, the sound absorption characteristics wereobtained using a B&K model 4206 two-microphone impedance tube. The testing system allowed the sound absorption coefficient to be measured for a wave normal to the absorber plane with a frequency in the range of 50 to 6400 Hz. The effects of thickness, density, and particle size of samples on the sound absorption coefficient were observed. By lowering the particle size and by increasing the sample thickness the absorption characteristics were improved. The composite made from smaller part

Druh

D - Stať ve sborníku

CEP obor

BI - Akustika a kmity

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2002

Kód důvěrnosti údajů

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

Název statě ve sborníku

International Congress and Exposition on Noise Control Engineering

ISBN

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ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

21-27

Název nakladatele

Internoise 2002

Místo vydání

Dearborn, USA

Místo konání akce

Dearborn, USA

Datum konání akce

19. 8. 2002

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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