Passive directional acoustic radiating
First Claim
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1. An acoustic apparatus, comprising:
- an acoustic driver, acoustically coupled to a pipe to radiate acoustic energy into the pipe,the pipe comprising an elongated opening along at least a portion of the length of the pipe through which acoustic energy is radiated to the environment, the opening lying in a plane that intersects an axis of the acoustic driver at a non-zero, non-perpendicular angle relative to the axis of the acoustic driver, andacoustically resistive material in the elongated opening,wherein the geometry and dimensions of the elongated opening, the non-zero, non-perpendicular angle, and the acoustic resistance of the acoustically resistive material, are configured so that the acoustic apparatus directionally radiates acoustic energy of wavelengths at least two times the diameter of a radiating surface of the acoustic driver.
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Abstract
An acoustic apparatus, including an acoustic driver, acoustically coupled to a pipe to radiate acoustic energy into the pipe. The pipe includes an elongated opening along at least a portion of the length of the pipe through which acoustic energy is radiated to the environment. The radiating is characterized by a volume velocity. The pipe and the opening are configured so that the volume velocity is substantially constant along the length of the pipe.
44 Citations
10 Claims
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1. An acoustic apparatus, comprising:
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an acoustic driver, acoustically coupled to a pipe to radiate acoustic energy into the pipe, the pipe comprising an elongated opening along at least a portion of the length of the pipe through which acoustic energy is radiated to the environment, the opening lying in a plane that intersects an axis of the acoustic driver at a non-zero, non-perpendicular angle relative to the axis of the acoustic driver, and acoustically resistive material in the elongated opening, wherein the geometry and dimensions of the elongated opening, the non-zero, non-perpendicular angle, and the acoustic resistance of the acoustically resistive material, are configured so that the acoustic apparatus directionally radiates acoustic energy of wavelengths at least two times the diameter of a radiating surface of the acoustic driver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification