Apparatus for creating acoustic energy in a balanced receiver assembly and manufacturing method thereof
AssigneeKnowles Electronics, LLC
InventorsDavid Earl Schafer, Mekell Jiles
Life of this patent
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Abstract
A paddle (142) of a diaphragm (118) of a receiver (100) is manufactured using one or more layers of a material selected for their inertial mass and rigidity. The paddle may have a layered structure with stiff outer layers such as aluminum and a less dense inner layer, such as thermoplastic adhesive. The inner and outer layers are selected to give an inertial mass matching that of an armature (124) of the receiver (100) and to give a lowest frequency bending resonance above a desired range, for example, 14 KHz.
Claims36
A diaphragm for a receiver, the receiver having a linkage assembly and an armature coupled thereto, the armature having a first inertial mass, the diaphragm comprising:
- an attachment point for connectively coupling to the linkage assembly;
- and
- a paddle, responsive to a movement of the linkage assembly, the paddle generally flat, having an upper surface and a lower surface, the paddle defining a plane, the paddle for creating sound pressure according to the movement of the linkage assembly, wherein the paddle has a second inertial mass such that momentum created by a movement of the armature is approximately equal to a momentum created by movement of the diaphragm.
A diaphragm for a receiver, the receiver having a linkage assembly and an armature coupled thereto, the armature having a first inertial mass, the diaphragm comprising:
- an attachment point for connectively coupling to the linkage assembly;
- and
- a paddle, responsive to a movement of the linkage assembly, the paddle generally flat, having an upper surface and a lower surface, the paddle defining a plane, the paddle for creating sound pressure according to the movement of the linkage assembly, wherein the paddle has a lowest frequency resonance greater than 7.5 KHz.
A diaphragm for a receiver, the receiver having a linkage assembly and an armature coupled thereto, the armature having a first inertial mass, the diaphragm comprising:
- an attachment point for connectively coupling to the linkage assembly;
- and
- a paddle, responsive to a movement of the linkage assembly, the paddle generally flat, having an upper surface and a lower surface, the paddle defining a plane, the paddle for creating sound pressure according to the movement of the linkage assembly, wherein the paddle a lowest frequency resonance greater than 7.5 KHz and has a has a second inertial mass such that momentum created by a movement of the armature is approximately equal to a momentum created by movement of the diaphragm.
A method of forming a paddle for use in a diaphragm of a receiver, the paddle having an inertial mass approximately equal to an inertial mass of an armature of the receiver and the diaphragm having a resonant frequency above an operational target, the method comprising:
- providing a first layer, the first layer being substantially two dimensional and defining a first plane, the first layer being a material selected having a predetermined density and rigidity;
- providing a second layer, the second layer being substantially two dimensional and defining a second plane, the second being a material selected to have a predetermined density and rigidity;
- assembling the first layer to the second layer in a co-planar fashion forming the paddle, the paddle for creating sound pressure according to a movement of the armature, the paddle having an inertial mass approximately equal to the inertial mass of the armature and further having a resonant frequency above the operational target.
Dependencies are inferred from the claim text.