Narrow angle cylindrical wave full range loudspeaker system

Claim 1

A loudspeaker system which has an output such that its frequency response at any angle at which a listener is positioned is uniform comprising, an enclosure formed with a slot near its top which substantially extends about its periphery, a low frequency speaker attached to the top of said enclosure to direct sound energy into said enclosure and out said slot, a horizontal planar member supported above said low frequency speaker, a convex radiating horn surface supported above said horizontal planar member, a hollow driving member with its center opening joined to said radiating horn, and a second speaker mounted to the top of said hollow member to supply sound energy through said hollow member such that it impinges on said horizontal planar member and radiates outwardly in the horizontal plane between said radiating horn and said horizontal planar member.

Claim 3

A system of electroacoustic transducer audio frequency drivers combined with acoustic transmission paths, all arranged symmetrically and in close proximity on the vertical axis of the system, and consisting of a vented box member and being square in cross-section, a flat top cover member of similar shape to the said cross-section of said box spaced a distance from said box less than the thickness of the walls of said box and mounted above said box, a low audio frequency electroacoustic driver whose cross-section is generally circular mounted on the flat top cover member and centered on the axis of symmetry over an opening formed in said flat top cover member, a disc shaped member mounted above and in a close vertical proximity to said low frequency driver radiation load, a high frequency electroacoustic driving means mounted above said disc-shaped member and said disc-shaped member forming one side of an acoustic transmission path for said high frequency driving means, a central hollow vertical member connected to and blending into a geometrically horizontally radiating surface member and the combination mounted above aid disc-shaped said and shaped with said disc-shaped member to form an acoustic transmission path which provides an acoustic impedance transformation between said high frequency driving means which is mounted on the top of said hollow vertical member so that said combination forms an opening for the transmission path with said high frequency driving means radiating into said acoustic transmission path, such that the combined radiation of said low frequency driver and said high frequency driving means will concentrate the radiated sound energy into a horizontal plane defined by the position of a listener's ears, and such that the sound intensity in the path directly from the system to the listener's ears is such that the intensity in any horizontal direction does not vary with direction and such that the sound intensity along the path directly from the system to the listener's ears is always greater than the intensity of any sound from the system reflected from a wall to the listener's ears.

Claim 4

A system of electroacoustic transducer audio frequency drivers combined with acoustic transmission paths, all arranged symmetrically and in close proximity on the vertical axis of the system, and consisting of a vented box member and being square in cross-section, a flat top cover member of similar shape to the said cross-section of said box spaced a distance from said box less than the thickness of the walls of said box and mounted above said box, a low audio frequency electroacoustic driver whose cross-section is generally circular mounted on the flat top cover member and centered on the axis of symmetry over an opening formed in said flat top cover member, a disc shaped member mounted above and in a close vertical proximity to said low frequency driver radiation load, a high frequency electroacoustic driving means mounted above said disc-shaped member and said disc-shaped member forming one side of an acoustic transmission path for said high frequency driving means, a central hollow vertical member connected to and blending into a geometrically horizontally radiating surface member and the combination mounted above aid disc-shaped said and shaped with said disc-shaped member to form an acoustic transmission path which provides an acoustic impedance transformation between said high frequency driving means which is mounted on the top of said hollow vertical member so that said combination forms an opening for the transmission path with said high frequency driving means radiating into said acoustic transmission path, such that the combined radiation of said low frequency driver and said high frequency driving means will concentrate the radiated sound energy into a horizontal plane defined by the position of a listener's ears, and such that the sound intensity in the path directly from the system to the listener's ears is such that the intensity in any horizontal direction does not vary with direction and such that the sound intensity along the path directly from the system to the listener's ears is always greater than the intensity of any sound from the system reflected from a wall to the listener's ears.