Acquisition Source
Legacy CDMS
Date Acquired
August 16, 2013
Publication Date
July 1, 1948
Report/Patent Number
NACA-TN-1647Report Number: NACA-TN-1647 Accession Number
93R11554
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
SOUND MEASUREMENTSOUND - AIRPLANESSOUND - ENGINESSOUND - PROPELLERSNOISE ELIMINATIONAIRPLANES, LIGHT