Patent ID: 9100753
Filing Date: 2015-08-04
Classification: H04R

Abstract:
1. An electro-magnetic transducer, comprising: a. a housing; b. a plurality of magnetic circuits supported by the housing, one or more of the plurality of magnetic circuits forming end surfaces at predetermined spaced locations within the housing, the end surfaces or the one or more magnetic circuits being operative to emanate magnetic flux densities of equal and opposite polarities at the predetermined spaced locations; c. a further magnetic circuit, the further magnetic circuit being structurally configured so that components of the further magnetic circuit terminate with their respective ends facing one another across a predetermined expanse with a movable dipole of magnetically permeable material residing in the predetermined expanse, the dipole having its opposite longitudinal ends in spaced relationship to the respective facing ends of the circuit components so as to form two gaps, one at each end of the dipole, the dipole being configured and positioned so that its opposite ends reside in proximity to the predetermined spaced locations in magnetic flux of equal and opposite polarities emanating at the end surfaces of the one or more magnetic surfaces; and d. a non-magnetic permeable support member affixed to and supporting the dipole, said support member providing selective positional compliance so that its support of the dipole is compliant in the direction generally perpendicular to the plane of the support surface and generally non-compliant within such plane, at least one of the plurality of magnetic circuits being non-static and operative to vary the magnetic flux in the proximity of the predetermined spaces, the dipole being operative to move under the influence of the interaction of the magnetic fluxes at the predetermined spaced locations in response to a changes in the magnetic flux created by at least one of the magnetic circuits.