Wave shaping sound chamber
OwnerAlan Brock Adamsoninventor
Life of this patent
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Abstract
A loudspeaker system containing wave-shaping sound chambers with approximately rectangular inlets and outlets of substantially the same size that are used to flatten or control the curvature of the acoustic wavefronts contained within system waveguides. Control of the degree of curvature of the wavefront enables the development of a wide variety of multi-waveguide arrays. The sound chambers are placed between a waveguides and a flattened conical horns of secondary waveguides. The sound chambers transform the curvature of the typical fan shaped wavefront that results from a conical horn throat into a wavefront that approximates a planar or curved rectangular ribbon of sound.
Claims20
A sound chamber having a substantially rectangular shaped inlet aperture, a substantially rectangular shaped outlet aperture and an axis extending from a center of the inlet aperture to a center of the outlet aperture, for the purpose receiving a sound wave in said inlet aperture from a sound source and transmitting the sound wave from said outlet aperture, the sound wave having a wavefront which is curved in a longer dimension of said inlet aperture, said sound chamber defining interiorly a predefined acoustic conduit including a plurality of acoustic paths connecting said inlet aperture to said outlet aperture, wherein said plurality of acoustic paths are not all equal in length but are so defined that the sound wavefront transmitted from said outlet aperture has a different degree of curvature in the longer dimension of said outlet aperture than a curvature in said longer dimension of the wavefront received at said inlet aperture.
A sound chamber comprising an outer shell and an inner body, said outer shell comprising a substantially rectangular shaped inlet aperture and a substantially rectangular shaped outlet aperture and opposing inner surfaces, said inner body being placed within said outer shell, said inner body having an outer surface, said inner opposing surfaces and said outer surface defining a predetermined space defining an acoustic conduit, said conduit defining a plurality of separated acoustic paths connecting said inlet aperture to said outlet aperture wherein said plurality of acoustic paths are not all equal in length.
A loudspeaker comprising an acoustic transducer, a primary waveguide, a sound chamber and a secondary waveguide, said primary waveguide comprising a wedge shaped acoustic conduit, having an entrance adapted to said acoustic transducer and an exit which is substantially rectangular shaped, said sound chamber having a substantially rectangular shaped inlet aperture and a substantially rectangular shaped outlet aperture, said inlet aperture adapted in size and shape to be affixed to said outlet aperture of said primary waveguide for purpose of receiving a sound wave from said primary waveguide and transmitting a sound wave from said inlet aperture to said outlet aperture, said sound wave having a wavefront, said wavefront being curved in a longer dimension of said inlet aperture, said sound chamber including a predefined acoustic conduit defining a plurality of separately spaced acoustic paths connecting said inlet aperture to said outlet aperture, wherein the plurality of acoustic paths are not all equal in length but are so defined that the sound wavefront transmitted from said outlet aperture has a different degree of curvature in a longer dimension of said outlet aperture than a curvature in said longer dimension of the wavefront received at said inlet aperture, said secondary waveguide including a wedge shaped acoustic conduit having an inlet aperture adapted to the shape of the outlet aperture of the sound chamber and having walls and an outlet aperture, and said walls expanding the sectional area of said secondary waveguide from said inlet aperture to the outlet aperture thereof at such angles as are required to control and direct the transmitted sound wave.
A sound chamber comprising an outer shell and an inner body and having a center portion and outer end portions, said outer shell comprising a substantially rectangular shaped inlet aperture and a substantially rectangular shaped outlet aperture and opposing inner surfaces, said inner body being placed within said outer shell, said inner body having an outer surface, said inner opposing surfaces and said outer surface defining a predetermined space defining an acoustic conduit, said conduit defining a plurality of acoustic paths connecting said inlet aperture to said outlet aperture wherein said plurality of acoustic paths are not all equal in length and wherein the acoustic paths are shorter adjacent said outer end portions of the sound chamber than through said central portion of the sound chamber.
Dependencies are inferred from the claim text.