NASA NTRS · 19840020499
Sonic levitation apparatus
Abstract
A sonic levitation apparatus is disclosed which includes a sonic transducer which generates acoustical energy responsive to the level of an electrical amplifier. A duct communicates with an acoustical chamber to deliver an oscillatory motion of air to a plenum section which contains a collimated hole structure having a plurality of parallel orifices. The collimated hole structure converts the motion of the air to a pulsed. Unidirectional stream providing enough force to levitate a material specimen. Particular application to the production of microballoons in low gravity environment is discussed.
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Dunn, S. A., Pomplum, A. R., Paquette, E. G., Ethridge, E. C., Johnson, J. L.. 1984-05-08. Sonic levitation apparatus. https://ntrs.nasa.gov/citations/19840020499
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