Sound field controller
First Claim
Patent Images
1. A method of influencing propagation of sound from a sound source through a region comprising:
- forming a barrier region in air between the sound source and a listener, including generating non-linear ultrasound with sound pressure of at least 140 decibels and directing the non-linear ultrasound at the region, an acoustic transducer driven at an ultrasound frequency at which the acoustic transducer mechanically resonates, the non-linear ultrasound resulting in at least one of;
(i) different acoustic impedance within the region compared to outside of the region; and
(ii) acoustic saturation of at least a portion of the region.
0 Assignments
0 Petitions
Accused Products
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.
18 Citations
17 Claims
-
1. A method of influencing propagation of sound from a sound source through a region comprising:
-
forming a barrier region in air between the sound source and a listener, including generating non-linear ultrasound with sound pressure of at least 140 decibels and directing the non-linear ultrasound at the region, an acoustic transducer driven at an ultrasound frequency at which the acoustic transducer mechanically resonates, the non-linear ultrasound resulting in at least one of; (i) 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 (2, 3, 4)
-
-
5. An apparatus for generating a barrier region in air, comprising:
-
an acoustic transducer adapted for generation of ultrasonic waves with sound pressure level of at least 140 decibels; and a signal driver adapted for 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; wherein the acoustic transducer is driven at an ultrasonic frequency at which the acoustic transducer mechanically resonates. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A method of influencing propagation of sound through a region comprising:
emitting non-linear ultrasound generated at sound pressure levels of at least 140 decibels into the 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