• Title/Summary/Keyword: sound vibration

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The selection to position visco-elastic material for reduction radiated sound power from a stiffened plate (보강판의 음향방사파워저감을 위한 제진재의 위치선정)

  • 안호일;김사수
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 1996.04a
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    • pp.257-262
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    • 1996

  • The first purpose of this study investigates the influence of stiffening on the acoustic response of stiffened plates, which are often employed in steel structures. And the radiation efficiency is measured by average mean square velocity and sound intensity of stiffened plates. The second, it determines influence of mass, damp and stiffeness due to the partial adhesive visco-elastic material to reduce radiated sound power.

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Construction of acoustics laboratory on the basis of ISO regulations (ISO 음향시험동 설치사례)

  • Han, Hee-Gap;Kim, Kyong-Ho
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2005.05a
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    • pp.379-382
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    • 2005

  • Recently, we founded acoustic research laboratory consist of five reverberation rooms on the basis of ISO regulations. Four kinds of experiment are possible in our laboratory such as sound transmission loss of wall, sound attenuation of suspended ceiling, absorption coefficient, reduction of transmitted impact sound by floor coverings. We are going to provide our customers with officially authorized acoustics data.

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