Spiral acoustic waveguide electroacoustical transducing system
AssigneeBose Corporation
InventorGeorge Nichols
Life of this patent
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Abstract
The invention features an acoustic waveguide and system for transmitting pressure wave energy produced by an electroacoustical transducer in a medium that propagates pressure wave energy. The acoustic waveguide and system includes a tube defining a spiral-shaped channel with a length of L. The tube has a first end and a second end with the first end closed and the second end open to the medium. The tube has a transducer opening for accommodating an electroacoustical transducer located between the first and second end of the tube. The system includes an electroacoustical transducer mounted to the acoustic waveguide.
Claims39
An acoustic waveguide for transmitting pressure wave energy produced by an electroacoustical transducer in a medium that propagates pressure wave energy, the waveguide comprising:
- a tube having a first end and a second end and formed in a spiral configuration, wherein the tube defines a spiral-shaped channel with a length L;
- and
- wherein a transducer opening for accommodating an electroacoustical transducer is adjacent to the first end of the tube and the second end of the tube is open to the medium.
An acoustic waveguide for transmitting pressure wave energy produced by an electroacoustical transducer in a medium that propagates pressure wave energy, the waveguide comprising:
- a tube having a first end and a second end and formed in a spiral configuration, the tube having a transducer opening for accommodating an electroacoustical transducer between the first end and second end of the tube;
- wherein the tube defines a first spiral-shaped channel located between the transducer opening of the tube and the first end of the tube and a contiguous second spiral-shaped channel located between the transducer opening of the tube and the second end of the tube;
- and
- wherein the first end of the tube is closed and the second end of the tube is open to the medium.
A system for transmitting pressure wave energy in a medium that propagates pressure wave energy in a medium, the system comprising:
- an electroacoustical transducer having a vibratile surface;
- and
- a spiral waveguide comprising,
- a tube having a first end and a second end and coiled in a spiral configuration, the tube defining a spiral-shaped channel with a length L;
- and
- wherein the first end of the tube is adjacent to the electroacoustical transducer and the second end of the tube is open to the medium.
A system for transmitting pressure wave energy in a medium that propagates pressure wave energy in a medium, the system comprising:
- an electroacoustical transducer having a vibratile surface;
- and
- a spiral waveguide comprising,
- a tube having a first end and a second end and coiled in a spiral configuration, he tube having a transducer opening acoustically coupled to the electroacoustical transducer between the first and second end of the tube;
- wherein the tube defines a first spiral-shaped channel located between the transducer opening of the tube and the first end of the tube and a contiguous second spiral-shaped channel located between the transducer opening of the tube and the second end of the tube;
- and
- wherein the first end of the tube is closed and the second end of the tube is open to the medium.
A method of making a spiral-shaped waveguide comprising:
- forming a first member having a top surface and a bottom surface, the top surface of the first member having a transducer opening, the bottom surface of the first member having at least one spiral-shaped tube;
- forming a second member having a top surface and a bottom surface, the top surface having at least one spiral-shaped groove that is the mirror image of the spiral-shaped groove provided on the bottom surface of the first member;
- attaching the bottom surface of the first member and the top surface of the second member such that the groove provided in the bottom surface of the first member aligns with the groove provided in the top surface of the second member, thereby forming a spiral shaped channel.
Dependencies are inferred from the claim text.