Dynamic acoustic waveguide
AssigneeWilliam Eugene Wheeler
InventorWilliam Eugene Wheeler
Life of this patent
Estimating the term…
Abstract
A loudspeaker and a method of operation which allow for the production and emphasis of extremely low bass tones. The loudspeaker generally is formed from a loudspeaker driver cone of conventional type which is placed in a very small enclosure with two waveguides attached thereto. A smaller balance waveguide is positioned forward of the face of the cone and a larger tuning waveguide is positioned to the side of the cone. The cross-sectional area of the aperture connections of both waveguides to the enclosure are small compared to the cross-sectional area of the loudspeaker driver cone.
Claims16
A loudspeaker comprising:
- an enclosure having a back side and an opposing front side, said enclosure enclosing a loudspeaker driver cone having a cross-sectional area at a forward face, said loudspeaker driver cone being disposed in said enclosure such that said cross-sectional area is disposed concentrically with said opening and is generally flush with said front side;
- a turning waveguide coupled to said enclosure at a position lateral to the loudspeaker driver cone, said turning waveguide extending a from said enclosure in a direction generally parallel to the plane of said cross-sectional area;
- and
- a balance waveguide coupled to said front side of said enclosure at said forward face of said loudspeaker driver cone generally coaxially with said cross-sectional area, said balance waveguide being shorter than said tuning waveguide;
- wherein said tuning waveguide includes a greater volume of air than said balance waveguide which in turn includes a greater volume of air than said enclosure;
- and
- wherein said coupling of said balance waveguide to said enclosure has a cross-sectional area smaller than said cross-sectional area of said forward face of said driver cone.
The loudspeaker of claim I wherein said volume of air in said balance waveguide is at least 2.5 times the volume of air in said enclosure.
A method of producing a sound wave of less than 60 Hz, the method comprising:
- providing:
- an enclosure having a back side and an opposing front side, said enclosure enclosing a loudspeaker driver cone having a cross-sectional area at a forward face, said loudspeaker driver cone being disposed in said enclosure such that said cross-sectional area is disposed concentrically with said opening and is generally flush with said front side;
- a tuning waveguide coupled to said enclosure at a position lateral to said loudspeaker driver cone by an aperture having a cross-sectional area less than said cross-sectional area of said forward face, said tuning waveguide extending from said enclosure in a direction generally parallel to the plane of said cross-sectional area;
- and
- a balance waveguide coupled to said enclosure at said forward face of said loudspeaker driver cone generally coaxially with said cross-sectional area by an aperture having a cross-sectional area less than said cross-sectional area of said forward face;
- driving said driver cone to produce a sound wave at said forward face;
- directing at least a portion of said sound wave into both said tuning waveguide and said balance waveguide in a manner that said sound wave upon exiting said tuning waveguide and said balance waveguide is less than 60 Hz.
Dependencies are inferred from the claim text.