MINIATURE ELECTRO-ACOUSTIC TRANSDUCER WITH INTEGRATED COUPLING COIL

摘要

The present invention relates to a miniature electro-acoustic transducer assembly comprising a magnet circuit comprising a permanent magnet assembly arranged to generate a magnetic flux in an air gap, a voice coil positioned at least partly in t he air gap, the voice coil being operatively connected to a displaceable diaphragm, and a coupling coil formed by an electrically conducting path, the coupling coil being adapted to couple to a T-coil of an associated hearing aid by generating, in relation to the miniature electro-acoustic transducer, an external electro- magnetic field having a spatial extension overlapping said coil of the associated hearing aid, wherein diaphragm displacements are essentially unaffected by current flowing in the electrically conducting path forming the coupling coil.