Parametric system for generating a sound halo, and methods of use thereof
First Claim
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1. A parametric system for generating audible sound, the parametric system comprising:
- a transducer array free of paraxial transducers and configured to emit modulated ultrasonic waves in a converging wave pattern toward a focal volume, wherein the modulated ultrasonic waves are configured to demodulate to generate audible sound waves in the focal volume, and wherein the generated audible sound waves emanate from the focal volume with a diverging wave pattern;
a controller configured to operate the transducer array to emit the modulated ultrasonic waves; and
wherein the transducer array comprises planar sheets of a transducer material with patterned electrodes such that the electrodes comprise a contiguous electrode at a constant distance from the center of the focal volume.
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Abstract
A parametric system for generating audible sound, comprising a transducer array configured to emit modulated ultrasonic waves in a converging wave pattern toward a focal volume, where the modulated ultrasonic waves are configured to demodulate to generate audible sound waves in the focal volume, and where the generated audible sound waves emanate from the focal volume with a diverging wave pattern.
16 Citations
18 Claims
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1. A parametric system for generating audible sound, the parametric system comprising:
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a transducer array free of paraxial transducers and configured to emit modulated ultrasonic waves in a converging wave pattern toward a focal volume, wherein the modulated ultrasonic waves are configured to demodulate to generate audible sound waves in the focal volume, and wherein the generated audible sound waves emanate from the focal volume with a diverging wave pattern; a controller configured to operate the transducer array to emit the modulated ultrasonic waves; and wherein the transducer array comprises planar sheets of a transducer material with patterned electrodes such that the electrodes comprise a contiguous electrode at a constant distance from the center of the focal volume. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A parametric system for generating audible sound, the parametric system comprising:
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a transducer array that is free of paraxial transducers, wherein the transducer array is configured to emit modulated ultrasonic waves with a numerical aperture ranging from greater than about 0.05 to about 0.5 toward a focal volume, such that the emitted modulated ultrasonic waves generate a sound pressure level in the focal volume of at least about 150 decibels; and a controller configured to operate the transducer array to emit the modulated ultrasonic waves, wherein the transducer array comprises a plurality of transducers that are spaced an integer number of wavelengths apart from the center of the focal volume. - View Dependent Claims (8, 9, 10, 11)
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12. A method for generating audible sound, the method comprising:
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emitting modulated ultrasonic waves in a converging wave pattern toward a focal volume with an array of transducers comprising a plurality of transducers spaced around the center of the focal volume and the array being free of paraxial transducers; demodulating the emitted ultrasonic waves to generate audible sound waves in the focal volume; and emanating the generated audible sound waves from the focal volume in a diverging wave pattern. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification