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Simplified Rotation In Acoustic LevitationNew technique based on old discovery used to control orientation of object levitated acoustically in axisymmetric chamber. Method does not require expensive equipment like additional acoustic drivers of precisely adjustable amplitude, phase, and frequency. Reflecting object acts as second source of sound. If reflecting object large enough, close enough to levitated object, or focuses reflected sound sufficiently, Rayleigh torque exerted on levitated object by reflected sound controls orientation of object.
Document ID
19890000263
Document Type
Other - NASA Tech Brief
Authors
Barmatz, M. B. (Caltech)
Gaspar, M. S. (Caltech)
Trinh, E. H. (Caltech)
Date Acquired
August 14, 2013
Publication Date
May 1, 1989
Publication Information
Publication: NASA Tech Briefs
Volume: 13
Issue: 5
ISSN: 0145-319X
Subject Category
FABRICATION TECHNOLOGY
Report/Patent Number
NPO-17086
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.