Dual coil floating mass transducers

• US 5,897,486 A
• Filed: 03/11/1997
• Issued: 04/27/1999
• Est. Priority Date: 07/01/1993
• Status: Expired due to Term

• Current Assignee: MED-EL Elektromedizinische Gerate GmbH (MED-EL Corporation)
• Original Assignee: Symphonix Devices, Inc. (MED-EL Corporation)
• Inventors: Ball, Geoffrey R., Dietz, Timothy G., Jaeger, Eric M., Katz, Bob H., Julian, Christopher A., Pombo, August C.
• Primary Examiner(s): Lacyk, John P.
• Application Number:
  US08/816,115
• Time in Patent Office: 777 Days
• Field of Search: 600/25, 181/126-137, 381/68-69.2, 607/55-57
• US Class Current: 600/25
• CPC Class Codes: H04R 11/00 Transducers of moving-armature or moving-core type acoustic diaphragm of magnetisable material directly coacting with electromagnet H04R13/00
• CPC Class Codes: H04R 2209/041 Voice coil arrangements comprising more than one voice coil unit on the same bobbin
• CPC Class Codes: H04R 25/606 acting directly on the eardrum, the ossicles or the skull, e.g. mastoid, tooth, maxillary or mandibular bone, or mechanically stimulating the cochlea, e.g. at the oval window
• CPC Class Codes: H04R 25/75 Electric tinnitus maskers providing an auditory perception
• CPC Class Codes: Y10T 29/49071 by winding or coiling

Abstract

A dual coil floating mass transducer for assisting a person'"'"'s hearing is provided. Inertial vibration of the housing of the floating mass transducer produces vibrations in the inner ear. A magnet is disposed within the housing biased by silicone springs so that friction is reduced between the magnet and the interior surface of the housing. Two coils reside within grooves in the exterior of the housing which cause the magnet to vibrate when an electrical signal is applied to the coils.

Claims

1. An apparatus for improving hearing, comprising:

a housing;

at least one coil coupled to an exterior of the housing; and

a magnet positioned within the housing so that an electrical signal through the at least one coil causes the magnet to vibrate relative to the housing, wherein vibration of the magnet causes inertial vibration of the housing in order to improve hearing.

2. The apparatus of claim 1, wherein the at least one coil is a pair of coils, each coil wound around the housing in opposite directions.

3. The apparatus of claim 1, wherein the housing is a sealed cylinder.

4. The apparatus of claim 1, wherein the housing includes a groove for each of the at least one coil, each of the at least one coil being wound around a groove.

5. The apparatus of claim 1, further comprising a biasing mechanism secured to the housing, the biasing mechanism biasing movement of the magnet within the housing.

6. The apparatus of claim 1, further comprising a biasing mechanism secured to the magnet, the biasing mechanism biasing movement of the magnet within the housing.

7. The apparatus of claim 6, wherein the biasing mechanism is coupled to the housing in order to restrict the magnet to linear movement within the housing.

8. The apparatus of claim 7, wherein the biasing mechanism includes silicone.

9. The apparatus of claim 1, further comprising a clip coupled to the housing adapted for attachment to an ossicle.

10. The apparatus of claim 9, wherein the clip includes at least two pairs of opposing prongs.

11. The apparatus of claim 7, wherein the clip includes rectangular prongs with openings therethrough.

12. An apparatus for improving hearing, comprising:

a cylindrical housing having two ends;

a pair of coils coupled to an exterior of the housing; and

a cylindrical magnet positioned within the housing so that an electrical signal through the at least one coil causes the magnet to vibrate relative to the housing, wherein vibration of the magnet causes inertial vibration of the housing in order to improve hearing.

13. The apparatus of claim 12, wherein each coil is wound around the housing in an opposite direction.

14. The apparatus of claim 12, wherein the housing is a sealed cylinder and at least one end is welded to seal the housing.

15. The apparatus of claim 12, wherein the housing includes two grooves on the exterior between the two ends, each coil being wound around a groove.

16. The apparatus of claim 12, further comprising a pair of silicone biasing mechanisms within the housing, the biasing mechanisms biasing movement of the magnet within the housing.

17. The apparatus of claim 16, wherein each biasing mechanism is secured to an end of the magnet.

18. The apparatus of claim 17, wherein each end of the housing has an indentation on an interior of the housing so that each biasing mechanism is positioned partially within an indentation in order to restrict the magnet to linear movement within the housing.

19. The apparatus of claim 16, wherein each biasing mechanism is secured to an end of the magnet with an adhesive.

20. An apparatus for improving hearing, comprising:

a cylindrical housing having two ends and a pair of grooves between the two ends;

a pair of coils coupled to an exterior of the housing, each coil being wound around one of the pair of grooves; and

a cylindrical magnet positioned within the housing so that an electrical signal through the at least one coil causes the magnet to vibrate relative to the housing, wherein vibration of the magnet causes inertial vibration of the housing in order to improve hearing.

21. The apparatus of claim 20, wherein each coil is wound around the housing in an opposite direction.

22. The apparatus of claim 20, wherein the housing is a sealed cylinder and at least one end is welded to seal the housing.

23. The apparatus of claim 20, further comprising a pair of silicone biasing mechanisms within the housing, the biasing mechanisms biasing movement of the magnet within the housing.

24. The apparatus of claim 23, wherein each biasing mechanism is secured to an end of the magnet.

25. The apparatus of claim 24, wherein each end of the housing has an indentation on an interior of the housing so that each biasing mechanism is positioned partially within an indentation in order to restrict the magnet to linear movement within the housing.

26. The apparatus of claim 23, wherein each biasing mechanism is secured to an end of the magnet with an adhesive.

27. A system for improving hearing, comprising:

an audio processor that generates electrical signals in response to ambient sounds; and

a transducer electrically coupled to the audio processor, the transducer comprising;

a housing;

at least one coil coupled to an exterior of the housing; and

a magnet positioned within the housing so that an electrical signal through the at least one coil causes the magnet to vibrate relative to the housing, wherein vibration of the magnet causes inertial vibration of the housing in order to improve hearing.