Patent ID: 6597797
Filing Date: 2003-07-22
Classification: H04R

Abstract:
A loudspeaker system constructed for producing hemispherically shaped sound patterns, said system comprising:A. at least one loudspeaker driver for generating sound energy in response to the activation thereof, said driver comprising a circular shaped diaphragm mounted in juxtaposed, spaced, cooperating relationship with the portal zone of the housing; B. a housing comprising a substantially spherical shape having an upwardly facing portal zone with the loudspeaker driver supportingly maintained therein, in cooperating relationship with the portal zone; and C. a reflector a. comprising a generally circular shaped, outer peripheral edge, b. mounted to said housing in juxtaposed, spaced, facing relationship with the portal zone thereof, c. incorporating a radially and annularly symmetrical, concave shaped, downwardly facing surface formed therein, said concave shaped surface of the reflector comprising a geometric form beginning at the center or apex of the reflector and proceeding radially outwardly to the circular shaped, outer peripheral edge to a terminating, centrally disposed apex, and comprising an exponentially progressive curve, said exponentially progressive curve comprising the following formula De=(P1I)k, (P2I)k . . . (Pn)k where:De = Linear axial distance between reflector and sphere at anyincremental position along the acoustical path.and:P1, P2 . . . Pn = Linear axial distance of anyprevious (numbered) Deand:k = wavelength coefficient factor (in exponential form).Expressed as the expansion factor of the prime parameter AC/PLwhere:AC = coupling; area of cross sectionand:PL = loading; pressure units per area unitwhen:I = a fixed linear increment, andd. a plurality of vanes formed on the concave shaped surface, peripherally surrounding the apex thereof in juxtaposed, spaced, cooperating relationship with the portal zone of the housing and the loudspeaker driver maintained therewith, thereby providing a substantially improved and enhanced hemispherically shaped acoustic energy coverage pattern, while also enhancing the wide angle dispersion of high frequency bandwidths.