Patent ID: 6068080
Filing Date: 2000-05-30
Classification: G10K,H04R

Abstract:
An apparatus (1) for the redistribution of acoustic energy, comprising:a base (10) having an upper surface (12), a lower surface (14), a front surface (16), and a rear surface (18), said lower surface (14) positionable upon a supporting surface (20);a lens (30) having an upper surface (32), a lower surface (34), a front surface (36), and a rear surface (38); andmeans for mounting said lens (30) upon said base (10);said front surface (36) of said lens (30) including a reflective surface (50), a point (P) lying on said reflective surface (50), and at least one adjoining surface (S1), a line (L) passing through said point (P) and intersecting the lower surface (14) of said base (10) at a point (B), a point (F1) lying on said line (L) between said point (P) and said point (B), said reflective surface (50) defined by the surface of revolution (R1) of an elliptical arc (A1) rotated about said line (L) through an angle (.alpha.1) and the surface of revolution (R2) of an elliptical arc (A2) rotated about said line (L) through an angle (.alpha.2), said elliptical arc (A1) having a lower end terminating at said point (P) and constituting a portion of an ellipse (E1) having a focal point located at said point (F1), said elliptical arc (A2) having an upper end terminating at said point (P) and constituting a portion of an ellipse (E2) having a focal point located at said point (F1), said angle (.alpha.1) chosen such that said surface of revolution (R1) is convex with respect to said adjoining surface (S1), said angle (.alpha.2) chosen such that said surface of revolution (R2) is concave with respect to said adjoining surface (S1).