Patent ID: 7599511
Filing Date: 2009-10-06
Classification: H04R

Abstract:
1. A loudspeaker provided with a frame ( 101 ), a membrane ( 103 ) and a drive unit ( 105 ), the membrane having an outer circumferential edge suspended from the frame and an inner circumferential edge, the drive unit having a stationary part secured to the frame and a translatable part secured to the inner circumferential edge of the membrane, wherein the membrane includes a membrane body ( 104 ) which, viewed in a circumferential direction, has a pattern of folds ( 104 c ) radially extending between the inner circumferential edge and the outer circumferential edge of the membrane, which folds, viewed from the membrane body towards the driving unit in a direction substantially perpendicular to the membrane, have a depth (d) which increases from said edges towards an area ( 104 A) situated between the inner circumferential edge and the outer circumferential edge, in which area the folds are provided with faces ( 104 C), wherein a suspension means is provided which is secured to the frame and said faces.