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Noise and vibration level reduction by covering metal structures with layers of damping materialsOne of the most important methods of reducing the noise and vibration level is the damping of the secondary sources, such as metal plates, often used in vehicle structures, by means of covering materials with high internal viscosity. Damping layers are chosen at an optimum thickness corresponding to the frequency and temperature range in which a certain structure works. The structure's response corresponding to various real situations is analyzed by means of a measuring chain including electroacoustical or electromechanical transducers. The experimental results provide the dependence of the loss factor and damping transmission coefficient as a function of the damping layer thickness or of the frequency for various viscoelastic covering materials.
Document ID
19740020289
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Rugina, I.
(Kanner (Leo) Associates Redwood City, CA, United States)
Paven, H. T. O.
(Kanner (Leo) Associates Redwood City, CA, United States)
Date Acquired
August 7, 2013
Publication Date
June 1, 1974
Publication Information
Publication: The 4th Natl. Conf. on Acoustics, Vol. 1A (NASA-TT-F-15375)
Subject Category
Structural Mechanics
Accession Number
74N28402
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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