| CPC H04R 9/063 (2013.01) [H04R 1/403 (2013.01); H04R 7/16 (2013.01); H04R 9/025 (2013.01); H04R 9/046 (2013.01); H04R 9/06 (2013.01); H04R 2209/026 (2013.01); H04R 2400/11 (2013.01); H04R 2499/11 (2013.01)] | 25 Claims |
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1. An acoustic transducer comprising:
a plurality of acoustic diaphragms configured to vibrate in opposing directions in response to a received electrical signal;
a frame assembly comprising at least one frame component, the frame assembly coupled to a first diaphragm and a second diaphragm of the plurality of acoustic diaphragms;
a plurality of suspension elements comprising at least two primary-suspension-elements and at least two secondary-suspension-elements, each acoustic diaphragm connected to a first end of a primary-suspension-element and coupled to a first end of a secondary-suspension-element, each primary-suspension-element having a second end connected to an external section of the frame assembly, each secondary-suspension-element having a second end connected to an internal extended section of the frame assembly; and
a magnet assembly fixedly positioned within the frame assembly, the magnet assembly including a housing, at least two magnets, a first pole piece mounted on a first magnet of the at least two magnets and a second pole piece mounted on a second magnet of the at least two magnets, the housing having at least a first region for placement of the first magnet and a first vertical portion having a vertical height greater than a vertical height of the first magnet or the second magnet of the at least two magnets, the first magnet and the second magnet having a directionally similar magnetic orientation,
wherein the housing is one of a ferrous cup and a sleeve structure, a first ferrous cup and a second ferrous cup, or a dual-cup structure,
wherein the ferrous cup includes a base having a thickness less than a width of the first vertical portion,
wherein the first ferrous cup includes a first base and the second ferrous cup includes a second base, the first base having a thickness less than the width of the first vertical portion, the second base having a thickness less than a width of a second vertical portion of the second ferrous cup, and
wherein the dual-cup structure includes a base and a wall extending in equal and opposite directions from the base in place of the first vertical portion, a vertical height of the wall in each direction greater than the vertical height of the first magnet or the second magnet, the base having a thickness less than a width of the wall.
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