CPC H04R 1/2823 (2013.01) [H04R 11/02 (2013.01); H04R 2460/11 (2013.01)] | 20 Claims |
1. A balanced armature receiver comprising:
a housing;
a diaphragm disposed in the housing and separating an interior of the housing into a front volume and a back volume;
a sound port between the front volume and an exterior of the housing;
a motor disposed in the housing and comprising a coil located proximate an armature having a free-end portion movably located between permanent magnets retained by a yoke, the free-end portion of the armature coupled to a movable portion of the diaphragm;
a gas permeable barrier located on a portion of the receiver defining the back volume, the gas permeable barrier substantially impermeable to liquid infiltration,
wherein the gas permeable barrier provides barometric relief for the back volume of the housing.
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