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US 2009/0214066 A1Published application
Waveguide electroacoustical transducing
AssigneeBose Corporation
InventorsRobert Preston Parker, Eric J. Freeman, Jeffrey J. Hoefler
Life of this patent
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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.
Claims33
A loudspeaker assembly, comprising:
- 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 having dimensions acoustically coupled to the acoustic waveguide at a position along the waveguide, wherein the position and the dimensions cause an increase in the amplitude of the sound waves radiated from the acoustic waveguide.
1 more element
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 energy from an open end of the waveguide, the waveguide comprising structure that increases the amplitude of the acoustic radiation that is radiated from the open end of the waveguide.
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 energy 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
- an acoustic volume, acoustically coupled to the waveguide 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.
2 more elements
Dependencies are inferred from the claim text.