Patent ID: 9173022
Filing Date: 2015-10-27
Classification: H04R

Abstract:
1. An acoustic transducer comprising a magnet system and a diaphragm having a conductive element disposed thereon which is embraced by the magnetic field of the magnet system, wherein the magnetic field has a first locus with field vectors normal to and directed away from the magnet system, a second locus with field vectors directed parallel to the magnet system, and a third locus with field vectors normal to and directed toward to the magnet system, and wherein the conductive element comprises a first outer conductive portion arranged to coincide with said first locus and a second outer conductive portion arranged to coincide with said third locus for generating force parallel to the magnet system, and a central conductive portion arranged to coincide with said second locus for generating force normal to the magnet system; and wherein application of an audio frequency signal to the conductive element causes current to be carried by the conductive element in one direction through the first and third loci of the magnetic field, and in the opposite direction through the second locus of the magnetic field, thereby causing oscillation of the diaphragm.