Hearing aid receiver with vibration compensation
In order to reduce feedback in a hearing aid, a hearing aid receiver is provided that comprises a housing having an inside surface and an outside surface, a motor, an active armature that is attached to the motor and attached to the inside surface of the housing, the active armature being driven in a vibrational manner by the motor, and an external passive component that is attached to the outside surface of the housing, the external passive component designed to vibrate in a direction opposed to vibrations of the active armature. A corresponding method for operating such a hearing aid receives is also provided.
1. A hearing instrument receiver, comprising:
a housing comprising inner and outer surfaces;
first and second armature support blocks affixed to the inner and outer surfaces of the housing, respectively, at a common point in the housing;
a first armature comprising a body comprising fixed and free ends, where
the first armature lies in a plane defined by its body; and
the fixed end of the first armature is affixed to the first armature support block; and
a second armature comprising fixed and free ends, where
the second armature lies in a plane defined by its body;
the fixed end of the second armature is affixed to the second armature support block; and
the second armature lies in the same plane as the first armature.
2. A hearing instrument receiver as forth in claim 1 , where the first armature comprises an active armature and the second armature comprises a passive armature.
3. A hearing instrument receiver as forth in claim 1 , where the first and second armatures comprise identically-shaped bodies.
4. A hearing instrument receiver as forth in claim 1 , where the first and second armatures comprise U-shaped bodies.
5. A hearing instrument receiver as forth in claim 1 , where the first and second armatures are resonant at the same frequencies.
6. A hearing instrument receiver as forth in claim 1 , where vibration of the first armature opposes vibration of the second armature.
7. A hearing instrument receiver as forth in claim 1 , where the second armature further comprises a damper.
8. A hearing instrument receiver as forth in claim 7 , where the damper comprises a viscous material between the fixed and free ends of the second armature.