Sound Field Controller
First Claim
Patent Images
1. A method of influencing propagation of sound through a region comprising:
- emitting non-linear ultrasound into a region, the non-linear ultrasound resulting in at least one of;
(i) a different acoustic impedance within the region compared to outside of the region; and
(ii) acoustic saturation of at least a portion of the region.
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Abstract
A region of air is manipulated to reflect, absorb, or redirect sound energy to prevent the sound energy from reaching a listener separated from the sound source by the region of air. The region of air may be manipulated by directing ultrasonic sound waves with a sound pressure level of at least 140 decibels at the region of air.
31 Citations
78 Claims
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1. A method of influencing propagation of sound through a region comprising:
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emitting non-linear ultrasound into a region, the non-linear ultrasound resulting in at least one of; (i) a different acoustic impedance within the region compared to outside of the region; and (ii) acoustic saturation of at least a portion of the region. - View Dependent Claims (4, 9, 12, 14)
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2-3. -3. (canceled)
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5-8. -8. (canceled)
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10-11. -11. (canceled)
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13. (canceled)
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15-18. -18. (canceled)
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19. An apparatus for generating a barrier region in air, comprising:
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an acoustic transducer; and a signal driver providing a driving signal to the acoustic transducer to generate non-linear ultrasound in a region, the non-linear ultrasound resulting in at least one of; (i) a different acoustic impedance within the region compared to outside of the region; and (ii) acoustic saturation of at least a portion of the region. - View Dependent Claims (21, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 37, 40)
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20. (canceled)
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22. (canceled)
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33-36. -36. (canceled)
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38-39. -39. (canceled)
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41-77. -77. (canceled)
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78. A method of influencing propagation of sound through a region comprising:
emitting non-linear ultrasound into a region, the non-linear ultrasound resulting in at least one of; (i) reflecting the sound; (ii) refracting the sound; and (iii) converting the sound energy to heat energy.
Specification