Waveguide electroacoustical transducing
First Claim
Patent Images
1. A loudspeaker assembly, comprising:
- an acoustic waveguide;
an acoustic driver mounted to the waveguide so that a first surface radiates sound waves into the waveguide so that the sound waves are radiated from the waveguide and so that a second surface radiates sound waves to the environment through a path that does not include the waveguide; and
a closed acoustic volume acoustically coupled to the acoustic waveguide by an opening in the waveguide, the opening in the waveguide forming a coupling volume having a dimension determined by a thickness of a wall of the waveguide wherein the opening is positioned and the acoustic volume is dimensioned to increase the amplitude of the sound waves radiated from the acoustic waveguide at a wavelength at which radiation from the waveguide and radiation from the second surface of the acoustic driver destructively interfere.
1 Assignment
0 Petitions
Accused Products
Abstract
A loudspeaker assembly, including an acoustic waveguide; an acoustic driver mounted in the waveguide so that a first surface radiates sound waves into the waveguide so that the sound waves are radiated from the waveguide; and an acoustic volume acoustically coupled to the acoustic waveguide for increasing the amplitude of the sound waves radiated from the acoustic waveguide.
-
Citations
30 Claims
-
1. A loudspeaker assembly, comprising:
an acoustic waveguide; an acoustic driver mounted to the waveguide so that a first surface radiates sound waves into the waveguide so that the sound waves are radiated from the waveguide and so that a second surface radiates sound waves to the environment through a path that does not include the waveguide; and a closed acoustic volume acoustically coupled to the acoustic waveguide by an opening in the waveguide, the opening in the waveguide forming a coupling volume having a dimension determined by a thickness of a wall of the waveguide wherein the opening is positioned and the acoustic volume is dimensioned to increase the amplitude of the sound waves radiated from the acoustic waveguide at a wavelength at which radiation from the waveguide and radiation from the second surface of the acoustic driver destructively interfere. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
16. A loudspeaker assembly, comprising:
-
an acoustic driver; an acoustic waveguide with substantially continuous walls acoustically coupled to the acoustic driver so that a first surface of the acoustic driver radiates into the acoustic waveguide and so that the waveguide radiates acoustic radiation from an open end of the waveguide and so that a second surface radiates sound waves to the environment through a path that does not include the waveguide, the waveguide comprising a closed acoustic volume, acoustically coupled to the acoustic waveguide by an opening in the waveguide, the opening forming a coupling volume having a dimension determined by the thickness of a wall of the waveguide, wherein the closed acoustic volume is dimensioned and the opening is positioned to increase the amplitude of the acoustic radiation that is radiated from the open end of the waveguide at a wavelength at which radiation from the waveguide and radiation from the second surface of the acoustic driver destructively interfere. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
-
-
30. A loudspeaker apparatus comprising:
-
an acoustic waveguide; an acoustic driver having a first radiating surface and a second radiating surface, the acoustic driver mounted to the waveguide so that the first surface radiates acoustic energy into the acoustic waveguide so that the acoustic radiation is radiated from the waveguide; the loudspeaker apparatus characterized by a cancellation frequency at which radiation from the second surface is out of phase with the radiation from the waveguide, resulting in destructive interference between the radiation from the waveguide and the radiation from the second surface, resulting in a reduction in acoustic output from the loudspeaker apparatus at the cancellation frequency; and a closed acoustic volume, acoustically coupled to the waveguide by an opening in the waveguide, the opening forming a coupling volume having a dimension determined by a thickness of a wall of the waveguide, wherein the opening is positioned and the acoustic volume is dimensioned to increase the amplitude of the radiation from the waveguide resulting in less reduction in acoustic output from the loudspeaker apparatus at the cancellation frequency.
-
Specification