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US 7,062,063 B2Granted
Electroacoustic transducer
AssigneeSonion Horsens A/S
InventorsKaj Borge Hansen, Leif Johannsen
Life of this patent
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Abstract
An electroacoustic transducer includes a magnetic circuit of a magnetically conductive material with a pair of opposed surfaces defining a gap therebetween. The magnetic circuit includes a magnet inducing a magnetic field in the gap, the magnet having a surface constituting one of the opposed surfaces. The magnetic circuit further includes a diaphragm and a coil having electrically conducting paths secured to the diaphragm. The coil has portions of its paths situated in the gap.
Claims15
An electroacoustic transducer comprising
- a magnetic circuit of a magnetically conductive material with a pair of opposed surfaces defining a gap therebetween, the magnetic circuit comprising a magnet inducing a magnetic field in the gap, the magnet having a surface constituting one of the opposed surfaces,
- a substantially plane diaphragm, and
- a coil having electrically conducting paths secured to the substantially plane diaphragm, the coil having portions of its paths situated in the gap,
- wherein the magnetically conductive material defines magnetic return paths between the pair of opposed surfaces, said magnetic return paths extending in a plane being substantially parallel to the substantially plane diaphragm.
1 more element
Dependencies are inferred from the claim text.