Collimated, resonating, and tracking sound generating system

1 . A sound generating system, comprising:

a parabolic sound reflecting body; and

a speaker fixed on a support member that is connected with the parabolic sound reflecting body;

wherein the speaker generates sound in a first direction away from the parabolic sound reflecting body and in a second opposite direction toward the parabolic sound reflecting body; and

wherein the parabolic sound reflecting body is mounted on a stand and configured to rotate around two axes orthogonal to the first direction;

wherein amplitudes are constructively additive for a predetermined base frequency and one or more harmonics thereof of the sound generated by the speaker in the first direction and the sound generated by the speaker in the second direction and reflected from the parabolic sound reflecting body, and

wherein a change in a distance between the speaker and the parabolic sound reflecting body changes the predetermined frequency for which the amplitudes are constructively additive.

2 . The system of claim 1 , wherein the predetermined base frequency is in a range of frequencies from about 100 Hz to about 1200 Hz.

3 . The system of claim 1 , wherein the parabolic sound reflecting body is configured to rotate around the two axes orthogonal to the first direction via one or more rotational actuators disposed on the stand.

4 . A sound generating system, comprising:

first and second systems, each comprising:

a parabolic sound reflecting body; and

a speaker fixed on a support member that is connected with the parabolic sound reflecting body;

wherein the speaker generates sound in a first direction away from the parabolic sound reflecting body and in a second opposite direction toward the parabolic sound reflecting body:

wherein the parabolic sound reflecting body is mounted on a stand and configured to rotate around two axes orthogonal to the first direction; and

wherein the parabolic sound reflecting body is configured to rotate around the two axes orthogonal to the first direction via one or more rotational actuators disposed on the stand;

an optical sensor disposed on the support member or the stand;

a processor disposed in electrical communication with the optical sensor and the one or more rotational actuators, the processor configured to:

receive optical input from the optical sensor;

process the optical input to target recognition of a human ear, and to determine a target direction pointing toward the human ear; and

command the one or more rotational actuators to rotate the parabolic sound reflecting body so that the first direction coincides with the target direction;

wherein the processor of the first system is configured to:

receive optical input from the optical sensor of the first system;

process the optical input from the optical sensor of the first system to target recognition of a left human ear, and to determine a first target direction pointing toward the left human ear; and

command the one or more rotational actuators of the first system to rotate the parabolic sound reflecting body of the first system so that the first direction of the first system coincides with the first target direction; and

wherein the processor of the second system is configured to:

receive optical input from the optical sensor of the second system;

process the optical input from the optical sensor of the second system to target recognition of a right human ear, and to determine a second target direction pointing toward the right human ear; and

command the one or more rotational actuators of the second system to rotate the parabolic sound reflecting body of the second system so that the first direction of the second system coincides with the second target direction.

5 . The sound generating system of claim 4 , wherein:

in the first system, amplitudes are constructively additive for a first predetermined base frequency and one or more harmonics thereof of the sound generated by the speaker of the first system in the first direction and the sound generated by the speaker of the first system in the second direction and reflected from the parabolic sound reflecting body of the first system, and wherein a change in a distance between the speaker of the first system and the parabolic sound reflecting body of the first system changes the first predetermined base frequency; and

in the second system, amplitudes are constructively additive for a second predetermined base frequency and one or more harmonics thereof of the sound generated by the speaker of the second system in the first direction and the sound generated by the speaker of the second system in the second direction and reflected from the parabolic sound reflecting body of the second system, and wherein a change in a distance between the speaker of the second system and the parabolic sound reflecting body of the second system changes the second predetermined base frequency.

6 . The sound generating system of claim 5 , wherein:

the first predetermined base frequency is in a range of frequencies from about 100 Hz to about 1200 Hz;

the second predetermined base frequency is in a range of frequencies from about 100 Hz to about 1200 Hz; and

the first predetermined base frequency and the second predetermined base frequency are different frequencies, wherein the difference between the first and second base frequencies is less than or equal to 50 Hz.

7 . The sound generating system of claim 6 , wherein:

the first predetermined base frequency is about 428 Hz; and

the second predetermined base frequency is about 436 Hz.

8 . A sound generating system, comprising:

a first subassembly, comprising:

a first parabolic sound reflecting body; and

a first speaker fixed on a first support member that is connected with the first parabolic sound reflecting body;

wherein the first speaker generates sound in a first direction away from the first parabolic sound reflecting body and in a second opposite direction toward the first parabolic sound reflecting body;

wherein the first parabolic sound reflecting body is mounted on a first stand and configured to rotate around two axes orthogonal to the first direction via one or more first rotational actuators disposed on the first stand; and

a first optical sensor disposed on the first support member or the first stand; and

a second subassembly, comprising:

a second parabolic sound reflecting body; and

a second speaker fixed on a second support member that is connected with the second parabolic sound reflecting body;

wherein the second speaker generates sound in a third direction away from the second parabolic sound reflecting body and in a fourth opposite direction toward the second parabolic sound reflecting body;

wherein the second parabolic sound reflecting body is mounted on a second stand and configured to rotate around two axes orthogonal to the third direction via one or more second rotational actuators disposed on the second stand; and

a second optical sensor disposed on the second support member or the second stand; and

further comprising a processor disposed in electrical communication with the first and second optical sensors and the one or more first and second rotational actuators, the processor configured to:

receive first optical input from the first optical sensor;

receive second optical input from the second optical sensor;

process the first optical input to target recognition of a left human ear, and to determine a first target direction pointing toward the left human ear;

process the second optical input to target recognition of a right human ear, and to determine a second target direction pointing toward the right human ear;

command the one or more first rotational actuators to rotate the first parabolic sound reflecting body so that the first direction coincides with the first target direction; and

command the one or more second rotational actuators to rotate the second parabolic sound reflecting body so that the third direction coincides with the second target direction.

9 . The system of claim 8 , wherein

amplitudes are constructively additive for a first predetermined base frequency and one or more harmonics thereof of the sound generated by the first speaker in the first direction and the sound generated by the first speaker in the second direction and reflected from the first parabolic sound reflecting body; and

amplitudes are constructively additive for a second predetermined base frequency and one or more harmonics thereof of the sound generated by the second speaker in the third direction and the sound generated by the second speaker in the fourth direction and reflected from the second parabolic sound reflecting body.

10 . The sound generating system of claim 9 , wherein:

the first predetermined base frequency is in a range of frequencies from about 100 Hz to about 1200 Hz;

the second predetermined base frequency is in a range of frequencies from about 100 Hz to about 1200 Hz; and

the first predetermined base frequency and the second predetermined base frequency are different frequencies, wherein the difference between the first and second base frequencies is less than or equal to 50 Hz.

11 . The sound generating system of claim 10 , wherein:

the first predetermined base frequency is about 428 Hz; and

the second predetermined base frequency is about 436 Hz.