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Servo valve loudspeaker
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Method and apparatus for stabilizing levitated objects
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Rotary sound transducer
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Horn loaded transducer for acoustic levitation
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Method and apparatus for acoustic levitation
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Transducer for producing sound of very high intensity
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Loudspeaker with commutated coil drive
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EP0114910A1
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Subwoofer speaker system
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Acoustic levitation and methods for manipulating levitated objects
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