Patent Application

App. No. 12/515,624

Abstract

Claims (13)

1 . A membrane for an acoustic device, the membrane comprising

a rigid membrane portion having an edge;

a flexible membrane portion being connected to the rigid membrane portion along the edge;

wherein an exterior surface of the flexible membrane portion is concave in an idle state of the membrane and shaped such that a change of the curvature of said exterior surface contributes to an air volume shifted by the rigid membrane portion when membrane is excited.

2 . The membrane according to claim 1 , wherein the rigid membrane portion is oriented essentially perpendicular to the flexible membrane portion.

3 . The membrane according to claim 1 , wherein the flexible membrane portion is essentially wheel-rim shaped.

4 . The membrane according to claim 1 , wherein a cross-section of the exterior surface of the flexible membrane portion has, in the idle state of the membrane, a shape of a half ellipse.

5 . The membrane according to claim 4 , wherein the half ellipse has a larger half axis being oriented essentially perpendicular to the rigid membrane portion.

6 . The membrane according to claim 1 , wherein a cross-section of the exterior surface of the flexible membrane portion has, in a lower dead point of the membrane, a shape of a half circle.

7 . The membrane according to claim 1 , being designed in such a manner that a total harmonic distortion of the flexible membrane portion is essentially compensated by a total harmonic distortion of the rigid membrane portion.

8 . The membrane according to claim 1 , internal to an acoustic device which is an electroacoustic transducer device, an electrodynamic acoustic device, a piezoelectric acoustic device, a speaker, a microphone, a receiver, or a vibrator.

9 . The membrane according to claim 8 , wherein the acoustic device is a transducing element attached to the membrane.

10 . The membrane according to claim 8 , wherein the acoustic device is a handheld sound reproduction system, a wearable device, a near-field sound reproduction system, headphones, earphones, a portable audio player, an audio surround system, a mobile phone, a headset, a hearing aid, a hands free system, a television device, a TV set audio player, a video recorder, a monitor, a gaming device, a laptop, a DVD player, a CD player, a hard disk based media player, an Internet radio device, a public entertainment device, an MP 3 player, a hi-fi system, a vehicle entertainment device, a car entertainment device, a medical communication system, a speech communication device, a home cinema system, a home theater system, a flat television apparatus, an ambiance creation device, or a music hall system.

Assignments (12)