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TECHNICAL PAPERS

Investigation of the Sound Transmission into an Advanced Grid-Stiffened Structure

[+] Author and Article Information
Jeffrey S. Vipperman, Deyu Li, Ilya Avdeev

Department of Mechanical Engineering, University of Pittsburgh, Pittsburgh, PA 15261

Steven A. Lane

Air Force Research Laboratory, Space Vehicles Directorate, Kirtland AFB, NM 87117

J. Vib. Acoust 125(3), 257-266 (Jun 18, 2003) (10 pages) doi:10.1115/1.1569511 History: Received February 01, 2002; Revised November 01, 2002; Online June 18, 2003
Copyright © 2003 by ASME
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References

Figures

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Typical transmission loss spectrum for a flat panel
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Picture of a mock-scale AGS fairing test bed
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Cylindrical coordinate system and dimensions that describe the structure
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Details of FEA model components
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First few structural mode shapes from FEA results
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Representative FRF of structure
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First few acoustic mode shapes from FEA results
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Representative FRF between speaker and cavity microphone
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Noise transmission measurement setup
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Measured noise reduction spectrum showing acoustic and structural modes
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Measured noise reduction spectrum (NRS) showing various regions of transmission loss

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