Patent attributes
Planar magnetic headphones include a single layer of parallel elongated magnets spaced from each other and supported on a magnet holder matrix. The holder matrix can be plastic or it can be a metallic permeability plate, with the magnets being on the inside (toward the ear) of the plate. Inboard of the magnets is a plastic dampening matrix that supports a first continuous disk-shaped dampening membrane. A serpentine circuit trace is established on a thin diaphragm that is outboard of the magnets to excite the magnets and move the diaphragm to produce sound according to the current in the trace. Still further outboard of the circuit race and positioned against a hard plastic outer cover is a second continuous disk-shaped dampening membrane. A circular pattern of holes is formed through the outer cover.
