ENHANCED EFFICIENCY PLANAR TRANSDUCERS

摘要

Planar magnetic transducers (20) including diaphragms (24) having electrical conductors (32) thereon which are mounted within frames (21, 22) so that spaced magnets (28) are disposed on opposite sides of central sound producing surface areas of the diaphragms. Pole elements (42) are provided in spaced relationship between each of the magnets and extend inwardly toward the diaphragms so to form pole extensions for causing magnetic flux from the poles of the magnets proximate to the diaphragms to extend more densely and generally parallel to the electrical conductors between the magnets and the pole elements. Openings (40) for acoustic waves are provided between the pole elements and adjacent magnets.