NASA NTRS · 19790000567
Improved acoustic levitation apparatus
Abstract
Concave driver and reflector enhance and shape levitation forces in acoustic resonance system. Single-mode standing-wave pattern is focused by ring element situated between driver and reflector. Concave surfaces increase levitating forces up to factor of 6 as opposed to conventional flat surfaces, making it possible to suspend heavier objects.
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Berge, L. H., Johnson, J. L., Oran, W. A., Reiss, D. A.. 1980-06-01. Improved acoustic levitation apparatus. https://ntrs.nasa.gov/citations/19790000567
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