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Analytical investigation of synchrophasing as a means of reducing aircraft interior noiseThe noise control characteristics of synchrophasing are investigated using a simplified model of an aircraft fuselage. The analysis presented here includes directivity effects of the noise sources and solves in closed form the coupled motion between the interior and exterior acoustic fields and the shell vibrational response. The variation in sound pressure level at various locations inside the shell is studied for various synchrophase angles as well as the shell vibrational response and input power flow in order to uncover the principal mechanisms behind the transmission phenomena.
Document ID
19840024053
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Fuller, C. R. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Date Acquired
September 4, 2013
Publication Date
August 1, 1984
Publication Information
Publisher: NASA
Subject Category
Acoustics
Report/Patent Number
NASA-CR-3823
NAS 1.26:3823
Accession Number
84N32123
Funding Number(s)
CONTRACT_GRANT: NAG1-390
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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