Parametric virtual speaker and surround-sound system
First Claim
1. A method for generating at least one remote virtual speaker location in connection with at least a partial reflective environment and in combination with an audio speaker for creating a plurality of sound effects including a virtual sound source from the reflective environment which is perceived by a listener as an original sound source, said method comprising the steps of:
- a) generating a primary, direct audio output by emitting audio compression waves from audio speakers, thereby providing direct audio output to a listener;
b) generating secondary, indirect audio output from at least one virtual speaker remote from the audio speakers by emitting ultrasonic sound from at least one parametric speaker associated with the audio speakers and oriented toward at least one reflective environment which is remote from the audio speakers, thereby indirectly generating generally omni-directional sound from the reflective environment which is perceived as a virtual speaker; and
c) synchronizing the primary audio output of the audio speakers with the secondary audio output from the at least one virtual speaker such that the listener hears a plurality of sound effects from multiple directions.
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Abstract
A system for generating at least one remote virtual speaker location in connection with at least a partial reflective environment (12, 12, 14 or 15) in combination with an audio speaker for creating multiple sound effects including a virtual sound source from the reflective environment which is perceived by a listener (53) as an original sound source, by generating a primary direct audio output by emitting audio compression waves toward a listener, and generating a secondary indirect audio output from at least one virtual speaker (24, 25 or 26) remote from the audio speakers, by emitting ultrasonic sound from at least one parametric speaker (20, 21 or 22) associated with the audio speakers and oriented toward at least one reflective environment which is remote from the audio speakers
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Citations
20 Claims
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1. A method for generating at least one remote virtual speaker location in connection with at least a partial reflective environment and in combination with an audio speaker for creating a plurality of sound effects including a virtual sound source from the reflective environment which is perceived by a listener as an original sound source, said method comprising the steps of:
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a) generating a primary, direct audio output by emitting audio compression waves from audio speakers, thereby providing direct audio output to a listener;
b) generating secondary, indirect audio output from at least one virtual speaker remote from the audio speakers by emitting ultrasonic sound from at least one parametric speaker associated with the audio speakers and oriented toward at least one reflective environment which is remote from the audio speakers, thereby indirectly generating generally omni-directional sound from the reflective environment which is perceived as a virtual speaker; and
c) synchronizing the primary audio output of the audio speakers with the secondary audio output from the at least one virtual speaker such that the listener hears a plurality of sound effects from multiple directions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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- 13. A parametric sound system for providing multiple speaker locations around a listener with respect to a sound source location, said sound system including at least one parametric speaker having audio output generated in air from ultrasonic frequencies and being oriented toward at least one reflective surface which is remote from the sound source, said at least one parametric speaker providing secondary audio output along a path of reflective, parametric propagation for developing at least one virtual speaker remote from and electronically unconnected with the sound source.
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18. A method for distracting a person'"'"'s attention toward a remote location, by indirectly generating generally omni-directional sound at a remote virtual speaker source distant from the person, said generally omni-directional sound comprising at least one new sonic or subsonic frequency which corresponds to a difference between at least two interacting frequencies as part of a parametric speaker, said method comprising the steps of:
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a) emitting ultrasonic frequencies which correspond to the at least two interacting ultrasonic frequencies to generate a parametric audio output which extends along a sound column toward a reflective surface which forms the remote virtual speaker;
b) reflecting the parametric audio output from the reflective surface to develop a new direction of propagation of the sound column; and
c) distracting the adversary'"'"'s attention toward the virtual speaker as an indicator of location for the individual. - View Dependent Claims (19)
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20. A method for directing audio sound toward a location which is remote from an individual'"'"'s location and concealed around a corner of a physical structure by indirectly generating omni-directional sound at a remote virtual speaker source distant from the individual but along a common reflection surface, said omni-directional sound comprising at least one new sonic or subsonic frequency which corresponds to a difference between at least two interacting ultrasonic frequencies as part of a parametric speaker, said method comprising the steps of:
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a) emitting ultrasonic frequencies which correspond to the at least two interacting ultrasonic frequencies to generate a parametric audio output which extends along a sound column toward the reflective surface which forms the remote virtual speaker; and
b) reflecting the parametric audio output from the reflective surface to develop a new direction of propagation of the sound column which is redirected around the corner of the physical structure.
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Specification