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Rotating Microphone Rake Measures Spinning Acoustic ModesRotating rake of pressure transducers developed for use in experimental studies of sources and propagation of noise generated by subsonic fan engines. Pressure transducers used as microphones to measure acoustic modes generated by, and spin with, fans. Versatility of control software used in rake-drive system enables measurements of acoustic modes on wide range of test-engine configurations. Rake-drive hardware easily adapted to different engines because not mechanically coupled to engine under test.
Document ID
19960022407
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Konno, Kevin E.
(NASA Lewis Research Center, Cleveland, OH.)
Hausmann, Clifford R.
(NASA Lewis Research Center, Cleveland, OH.)
Date Acquired
August 17, 2013
Publication Date
May 1, 1996
Publication Information
Publication: NASA Tech Briefs
Volume: 20
Issue: 5
ISSN: 0145-319X
Subject Category
Mechanics
Report/Patent Number
LEW-15892
Accession Number
96B10222
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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