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US 11,706,561 B1Granted
Balanced armature receiver with liquid-resistant pressure relief vent
AssigneeKnowles Electronics, LLC
InventorsBrenno Varanda, Chris Monti, Steve Kearey, Donald Verghese Jacob, Tim Wickstrom, Jose Salazar, Alex Grossman, Matt Manley
Life of this patent
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Abstract
A balanced armature receiver includes a gas permeable barrier located on a portion of the receiver defining a back volume to provide barometric relief. The barrier can be located in a wall portion or diaphragm of the receiver to vent the back volume to an exterior of the receiver directly, via a front volume, or via a nozzle. The gas permeable barrier is impermeable to liquid infiltration and can be configured to influence the low frequency response of the receiver.
Claims20
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.
3 more elements
Dependencies are inferred from the claim text.