Passive directional acoustic radiating
First Claim
1. An audio system for a television comprising:
- a television cabinet;
a first slotted pipe type passive directional acoustic device comprisinga first acoustic driver, acoustically coupled to a pipe to radiate acoustic energy into the pipe,the first pipe comprisingan elongated opening along at least a portion of the length of the pipe; and
acoustically resistive material in the opening through which pressure waves are radiated to the environment,the pressure waves characterized by a volume velocity, the pipe, the opening, and the acoustically resistive material configured so that the volume velocity of the pressure waves radiated to the environment from the pipe is substantially constant along the length of the pipe; and
wherein the passive directional acoustic device is mounted in the television cabinet to directionally radiate sound waves laterally from the television cabinet.
1 Assignment
0 Petitions
Accused Products
Abstract
An audio system for a television using a pipe type passive directional acoustic device mounted in a television cabinet. The slotted pipe type passive directional acoustic device includes a first acoustic driver, acoustically coupled to a pipe to radiate acoustic energy into the pipe. The first pipe includes an elongated opening along at least a portion of the length of the pipe. Acoustically resistive material is in the opening. Pressure waves are radiated to the environment through the opening. The pressure waves are characterized by a volume velocity. The pipe, the opening, and the acoustically resistive material are configured so that the volume velocity is substantially constant along the length of the pipe. The passive directional acoustic devices directionally radiate sound waves laterally from the television cabinet.
-
Citations
19 Claims
-
1. An audio system for a television comprising:
-
a television cabinet; a first slotted pipe type passive directional acoustic device comprising a first acoustic driver, acoustically coupled to a pipe to radiate acoustic energy into the pipe, the first pipe comprising an elongated opening along at least a portion of the length of the pipe; and acoustically resistive material in the opening through which pressure waves are radiated to the environment, the pressure waves characterized by a volume velocity, the pipe, the opening, and the acoustically resistive material configured so that the volume velocity of the pressure waves radiated to the environment from the pipe is substantially constant along the length of the pipe; and wherein the passive directional acoustic device is mounted in the television cabinet to directionally radiate sound waves laterally from the television cabinet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
the other of the left channel or right channel; and a center channel.
-
-
11. The audio system of claim 1, wherein the cross sectional area of the pipe decreases along the length of the pipe.
-
12. The audio system of claim 1, further comprising a second slotted pipe type passive directional acoustic device comprising
a second acoustic driver, acoustically coupled to a pipe to radiate acoustic energy into the pipe, the second pipe comprising an elongated opening along at least a portion of the length of the pipe; - and
acoustically resistive material in the opening through which pressure waves are radiated to the environment, the pressure waves characterized by a volume velocity, the pipe, the opening, and the acoustically resistive material configured so that the volume velocity is substantially constant along the length of the pipe; and wherein the first passive directional acoustic device is mounted in the television cabinet to directionally radiate sound waves laterally leftward from the television cabinet and the second passive radiator is mounted in the television cabinet to directionally radiate sound waves laterally rightward from the television cabinet.
- and
-
13. An acoustic apparatus, comprising:
-
an acoustic driver, acoustically coupled to a passive directional device to radiate acoustic energy into the passive directional device, wherein the acoustic driver has a first radiating surface acoustically coupled to the first passive directional device and wherein the acoustic driver has a second radiating surface coupled to an acoustic device for radiating acoustic energy to the environment, wherein the acoustic device comprises a structure to reduce high frequency radiation from the acoustic source to the environment; wherein the cross sectional area of the passive directional device, normal to a central axis of the passive directional device, varies along the length of the passive directional device, the passive directional device comprising an opening in the perimeter of the passive directional device extending along at least a portion of the length of the passive directional device through which acoustic energy is radiated to the environment, the opening characterized by an opening area, wherein the opening has an acoustical resistance, and wherein substantially all of the acoustic energy radiated into the passive directional device by the acoustic driver exits the passive directional device through the opening or is dissipated in the acoustical resistance of the opening. - View Dependent Claims (14, 15, 16, 17, 18)
-
-
19. An acoustic apparatus, comprising:
-
an acoustic driver, acoustically coupled to a first end of a passive directional device to radiate acoustic energy into the passive directional device, the passive directional device comprising an opening in the perimeter of the passive directional device, the opening extending along at least a portion of a length of the passive directional device through which acoustic energy is radiated to an environment, the opening characterized by an opening area, wherein the passive directional device is characterized by a central axis extending along the length of the passive directional device, wherein the central axis of the passive directional device is at least one of;
bent and curved,wherein the opening has an acoustical resistance, wherein the acoustical resistance of the opening varies with distance from the acoustic driver along the passive directional device, and wherein the acoustic energy radiated into the passive directional device by the acoustic driver exits the passive directional device through the acoustical resistance of the opening, such that little acoustic energy remains within the passive directional device at a second end of the passive directional device.
-
Specification