US 9,813,805 B2
Apparatus for redistributing acoustic energy
Peter John Chapman, Lemvig (DK); and Martin Olsen, Struer (DK)
Assigned to BANG & OLUFSEN A/S, Struer (DK)
Appl. No. 15/26,078
Filed by Bang & Olufsen A/S, Struer (DK)
PCT Filed Oct. 16, 2014, PCT No. PCT/EP2014/072211
§ 371(c)(1), (2) Date Mar. 30, 2016,
PCT Pub. No. WO2015/055763, PCT Pub. Date Apr. 23, 2015.
Claims priority of application No. 2013 70588 (DK), filed on Oct. 16, 2013.
Prior Publication US 2016/0219366 A1, Jul. 28, 2016
Int. Cl. H04R 1/20 (2006.01); H04R 1/34 (2006.01); G10K 11/28 (2006.01); G10K 11/20 (2006.01)
CPC H04R 1/345 (2013.01) [G10K 11/20 (2013.01); G10K 11/28 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An apparatus for redistributing acoustic energy, the apparatus comprising a surface with:
a first part having a shape of a first surface of revolution, within a first angular interval from a first angular position to a second angular position and around an axis, of a first line extending through a point, P, on the axis;
a second part having a shape of a second surface of revolution, within a second angular interval from a fifth angular position to a sixth angular position and around the axis, of a second line extending through the point P, the first part being defined at longitudinal positions, along the axis, on one side of the point P and the second part being defined at longitudinal positions on an opposite side of the point P; and
a back surface extending, within a third angular interval from a third angular position to a fourth angular position and around the axis, the back surface being positioned further away from the axis than the first part,
wherein the first angular interval exceeds 230°.