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A high-powered siren for stable acoustic levitation of dense materials in the earth's gravityLevitation of large dense samples (e.g., 1-cm diameter steel balls) has been performed in a 1-g environment. A siren was used to study the effects of reflector geometry and variable-frequency operation in order to attain stable acoustic positioning. The harmonic content and spatial distribution of the acoustic field have been investigated. The best stability was obtained with an open reflector system, using a flat lower reflector and a slightly concave upper reflector while operating at a frequency slightly below resonance.
Document ID
19880053559
Document Type
Reprint (Version printed in journal)
Authors
Gammel, Paul M. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Croonquist, Arvid P. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Wang, Taylor G. (California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)
Date Acquired
August 13, 2013
Publication Date
February 1, 1988
Publication Information
Publication: Acoustical Society of America, Journal
Volume: 83
ISSN: 0001-4966
Subject Category
ACOUSTICS
Distribution Limits
Public
Copyright
Other