Directed acoustic sound system
First Claim
1. A system for reproducing audio signals, comprising:
- at least one source of audio signals, the audio signals corresponding to at least one audio channel;
a modulated signal generator configured to generate an ultrasonic carrier signal modulated with at least one of the audio signals;
a driver amplifier configured to amplify the modulated ultrasonic carrier signal; and
at least one directional loudspeaker, the directional loudspeaker including at least one acoustic transducer configured to receive the modulated ultrasonic carrier signal amplified by the driver amplifier, and to project a sound beam representing the modulated ultrasonic carrier signal through a propagation medium along a pre-selected path to reproduce the at least one audio signal along at least a portion of the path.
0 Assignments
0 Petitions
Accused Products
Abstract
An acoustic sound system usable in electronic entertainment systems that generates highly directional sound. The directed acoustic sound system includes a parametric audio sound system having a modulator for modulating an ultrasonic carrier signal with a processed audio signal, a driver amplifier for amplifying the modulated signal, and a parametric loudspeaker for projecting the modulated and amplified signal through the air for subsequent regeneration of the audio signal along a pre-selected path. The acoustic sound system allows a user to select the parametric loudspeaker, a connectable non-directional loudspeaker, or both loudspeakers for producing audible sound. The acoustic sound system may be employed in the home, in the workplace, or in any other environment where audio leakage is undesirable.
97 Citations
45 Claims
-
1. A system for reproducing audio signals, comprising:
-
at least one source of audio signals, the audio signals corresponding to at least one audio channel;
a modulated signal generator configured to generate an ultrasonic carrier signal modulated with at least one of the audio signals;
a driver amplifier configured to amplify the modulated ultrasonic carrier signal; and
at least one directional loudspeaker, the directional loudspeaker including at least one acoustic transducer configured to receive the modulated ultrasonic carrier signal amplified by the driver amplifier, and to project a sound beam representing the modulated ultrasonic carrier signal through a propagation medium along a pre-selected path to reproduce the at least one audio signal along at least a portion of the path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. A method of reproducing audio signals, comprising the steps of:
-
providing at least one audio signal by at least one audio source, the at least one audio signal corresponding to at least one audio channel;
generating an ultrasonic carrier signal modulated with at least one audio signal by a modulated signal generator;
amplifying the modulated ultrasonic carrier signal by a driver amplifier;
receiving the modulated ultrasonic carrier signal amplified by the driver amplifier by at least one directional loudspeaker including at least one acoustic transducer; and
projecting a sound beam representing the modulated ultrasonic carrier signal through a propagation medium along a pre-selected path to reproduce the at least one audio signal along at least a portion of the path by the at least one directional loudspeaker. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
-
-
36. A telephone system, comprising:
-
a receiver configured to receive information representative of at least one audio signal;
a modulated signal generator configured to generate an ultrasonic carrier signal modulated with the at least one audio signal;
a driver amplifier configured to amplify the modulated ultrasonic carrier signal; and
at least one directional loudspeaker, the directional loudspeaker including at least one acoustic transducer configured to receive the modulated ultrasonic carrier signal amplified by the driver amplifier, and to project a sound beam representing the modulated ultrasonic carrier signal through a propagation medium along a pre-selected path to reproduce the at least one audio signal along at least a portion of the path. - View Dependent Claims (37, 38, 39, 40)
-
-
41. A method of operating a telephone system, comprising the steps of:
-
receiving information representative of at least one audio signal by a receiver;
generating an ultrasonic carrier signal modulated with the at least one audio signal by a modulated signal generator;
amplifying the modulated ultrasonic carrier signal by a driver amplifier;
receiving the modulated ultrasonic carrier signal amplified by the driver amplifier by at least one directional loudspeaker including at least one acoustic transducer; and
projecting a sound beam representing the modulated ultrasonic carrier signal through a propagation medium along a pre-selected path by the directional loudspeaker, thereby reproducing the at least one audio signal along at least a portion of the path. - View Dependent Claims (42, 43, 44, 45)
-
Specification