Hypersonic transducer
First Claim
Patent Images
1. A method for transmitting audio information, comprising:
- receiving at least two audio signals, the audio signals comprising different audio information;
synthesizing a carrier signal and at least two side band signals;
encoding the at least two side band signals with different ones of the different audio information;
transmitting the carrier signal and the encoded side band signals to a plurality of transducers;
transmitting the carrier signal and the encoded side band signals from the plurality of transducers; and
actively adjusting a phase of the carrier signal and the encoded side band signal transmitted by at least one of the transducers relative to a phase of the carrier signal and the encoded side band signal transmitted by at least one other of the transducers for the purpose of controlling the directivity or focus of at least two hypersonic beams produced by the transducers, whereinat least two of the hypersonic beams produce different auditory signals, the auditory signals corresponding to different ones of the audio signals.
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Abstract
This invention provides methods and apparatus for focusing a hypersonic beam to control both a direction and depth of audible formation delivery. Signals that are delivered to each of a plurality of hypersonic transducer elements are adjusted in phase so that transmitted hypersonic signals are focused at a focal point anywhere in space. The focal point of a focused hypersonic beam may be used to scan a space of interest when used in a receive mode in a pinging process. When objects are detected, a focused hypersonic beam may be used to deliver audible information substantially only to a neighborhood of the detected object.
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Citations
11 Claims
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1. A method for transmitting audio information, comprising:
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receiving at least two audio signals, the audio signals comprising different audio information; synthesizing a carrier signal and at least two side band signals; encoding the at least two side band signals with different ones of the different audio information; transmitting the carrier signal and the encoded side band signals to a plurality of transducers; transmitting the carrier signal and the encoded side band signals from the plurality of transducers; and actively adjusting a phase of the carrier signal and the encoded side band signal transmitted by at least one of the transducers relative to a phase of the carrier signal and the encoded side band signal transmitted by at least one other of the transducers for the purpose of controlling the directivity or focus of at least two hypersonic beams produced by the transducers, wherein at least two of the hypersonic beams produce different auditory signals, the auditory signals corresponding to different ones of the audio signals. - View Dependent Claims (2, 3, 4, 5)
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6. A hypersonic transducer, comprising:
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means for synthesizing a carrier signal and at least two side band signals encoded with different audio information; means for transmitting the carrier signal and the encoded side band signals to a plurality of transducers; means for transmitting the carrier signal and encoded side band signals from the plurality of transducers, the transducers outputting at least two hypersonic beams that produce different auditory signals corresponding to different ones of the different audio information; and means for actively adjusting a phase of the carrier signal and the encoded side band signals transmitted by at least one of the transducers relative to a phase of the carrier signal and the encoded side band signal transmitted by at least one other of the transducers for the purpose of controlling the directivity or focus of the hypersonic beams produced by the transducers.
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7. A hypersonic transducer system for transmitting audio information with hypersonic beams, the system comprising:
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at least one transducer array, each transducer array comprising a plurality of transducers; two or more audio sources, each audio source outputting a corresponding audio signal; at least one means for generating a carrier signal; at least one means for generating a sideband signal encoded with at least one of the audio signals; a plurality of signal conditioning circuits; a plurality of delay circuits; a plurality of drive circuits that drive the transducers; and at least one controller that controls generation of input signals for the drive circuits, the input signals being generated from the at least one carrier signal and the at least one sideband signal, wherein the controller controls the signal conditioning circuits to adjust amplitudes of the input signals, and controls the delay circuits to adjust delays of the input signals so that the at least one transducer array outputs at least two hypersonic beams focused to deliver different audio information to different audio information recipients. - View Dependent Claims (8, 9, 10, 11)
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Specification