Patent ID: 11889258
Assignee: POLK AUDIO, LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A loudspeaker driver or tweeter comprising:
a chassis; and
a magnet system defining an annular air gap for a voice coil; and
a loudspeaker diaphragm connected with the voice coil, the loudspeaker diaphragm comprising:
a substantially circular diaphragm portion which connects to the voice coil at a voice coil attachment segment and the chassis that includes an annular, arch-profiled strip area;
a first roll portion having a substantially circular first outer edge and an elliptical, non-circular first inner edge defining a central recessed area, the central recessed area having an elliptical major or long axis and a minor or short axis, the central recessed area being rigidly fixed to one of the magnet system and the chassis;
a second roll portion defining an outer area that is rigidly fixed to one of the magnet system and the chassis, the second roll portion having a substantially circular second inner edge and an elliptical, non-circular second outer edge having a major and minor axis,
wherein the substantially circular first outer edge of the first roll portion and the substantially circular second inner edge of the second roll portion connect to the voice coil attachment segment.