Single magnet planar-magnetic transducer

A planar-magnetic transducer comprising:

• a magnet formed from a continuous piece of magnetic material, the magnet including a first surface and a second surface opposite the first surface, the magnet including a plurality of parallel slots extending through the magnet from the first surface to the second surface, each of the plurality of parallel slots having a width and at least one slot of the plurality of slots having a different width than other slots of the plurality of slots;
• a diaphragm mechanically coupled to a frame and disposed at a predetermined distance from the first surface of the magnet via the frame;
• and
• an electrically conductive trace coupled to the diaphragm, the trace being centered on an edge of the at least one slot.

A method of manufacturing a planar-magnetic transducer comprising:

• forming a magnet from a continuous piece of magnetic material such that the magnet includes at least one slot, the magnet including a first surface and a second surface opposite the first surface, the at least one slot extending through the magnet from the first surface to the second surface;
• attaching a diaphragm to a frame;
• mechanically coupling the magnet to the frame such that the diaphragm is disposed at a predetermined distance from the first surface of the magnet via the frame;
• and
• attaching an electrically conductive trace comprising a continuous layer of conductive material to the diaphragm, such that the continuous layer of conductive material is centered on an edge of the at least one slot.

A stereo headphone comprising:

• a headband;
• a pair of speaker support frames, each speaker support frame coupled o the headband;
• and
• a pair of planar-magnetic loudspeakers, one of the planar-magnetic loudspeakers mounted on, each of the speaker support frames;
• wherein each planar-magnetic loudspeaker include:
• a magnet formed from a continuous piece of magnetic material, the magnet including a first surface and a second surface opposite the first surface, the magnet including at least one slot extending through the magnet from the first surface to the second surface,
• a diaphragm mechanically coupled to a frame and disposed at a predetermined distance from the first surface of the magnet via the frame, and
• an electrically conductive trace coupled to the diaphragm, the trace comprising a continuous layer of conductive material centered on an edge of the at least one slot.