Patent ID: 9565498
Date: 2017-02-07
CPC Classifications: H04R

Claim:
1. An apparatus including a first driver that transforms an electrical signal into air movement, wherein the first driver comprises: a source of a non-varying magnetic field; a first movable surface, wherein the first movable surface comprises an electrically insulating, non-magnetic material; a coil comprising a substantially flat planar arrangement of an electrically conductive material, wherein the coil is disposed on the first movable surface and the first movable surface is directly driven thereby; a first gap between the source of a non-varying magnetic field and the first movable surface; a second movable surface spaced apart from the first movable surface by a second gap, wherein the second movable surface comprises an electrically conductive, non-magnetic material, and wherein: (a) the second movable surface is not directly driven; (b) the second gap is not sealed; and (c) the air movement results from movement of the first movable surface and the second movable surface.