Patent ID: 7912240
Filing Date: 2011-03-22
Classification: H04R

Abstract:
1. A miniature electroacoustic transducer comprising: a transducer housing comprising a sound aperture, and a magnetically conductive first housing portion surrounding a magnet assembly; the magnet assembly adapted to generate a first magnetic flux with a first predetermined orientation within a first magnetic gap and adapted to generate a second magnetic flux with a second predetermined orientation within a second magnetic gap; a common magnetic flux path comprising the magnet assembly and the first and second magnetic gaps; a first moveable assembly comprising a first electrically conductive coil positioned in the first magnetic gap and coupled to a first diaphragm to enable motion of the first moveable assembly in a first direction of motion substantially perpendicular to the first magnetic flux; a second moveable assembly comprising a second electrically conductive coil positioned in the second magnetic gap and coupled to a second diaphragm to enable motion of the second moveable assembly in a second direction of motion substantially perpendicular to the second magnetic flux, wherein said magnet assembly comprises a centrally positioned permanent magnet assembly operatively secured to an inner side wall portion of the magnetically conductive first housing portion, wherein said common magnetic flux path comprises the magnetically conductive first housing portion.