Systems, devices, components and methods for improved acoustic coupling between a bone conduction hearing device and a patient's head or skull

• US 9,526,810 B2
• Filed: 10/16/2014
• Issued: 12/27/2016
• Est. Priority Date: 12/09/2011
• Status: Active Grant

• Current Assignee: Sophono, Inc. (Medtronic Plc)
• Original Assignee: Sophono, Inc. (Medtronic Plc)
• Inventors: Ruppersberg, Peter
• Primary Examiner(s): Kuntz, Curtis
• Assistant Examiner(s): Zhu, Qin
• Application Number:
  US14/516,392
• Publication Number:
  US 20150038775A1
• Time in Patent Office: 803 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: A61L 24/0031 Hydrogels or hydrocolloids
• CPC Class Codes: A61L 24/06 obtained by reactions only involving carbon-to-carbon unsaturated bonds A61L24/043, A61L24/046 take precedence
• CPC Class Codes: H04R 2225/67 Implantable hearing aids or parts thereof not covered by H04R25/606
• CPC Class Codes: H04R 2460/13 Hearing devices using bone conduction transducers
• 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 3/002 Damping circuit arrangements for transducers, e.g. motional feedback circuits

Abstract

Disclosed are various embodiments of systems, devices, components and methods for improving acoustic coupling between a bone conduction hearing device (BCHD) and a patient'"'"'s head or skull. Such systems, devices, components and methods include disposing a gel or paste between the BCHD and the patient'"'"'s skin, hair and/or skull. The gel or paste improves the transmission of acoustic signals generated by a transducer in the BCHD to the patients head or skull by providing a more efficient and improved intermediary acoustic medium for the transmission of acoustic signals to the patient'"'"'s head or skull.

Claims

1. A method of improving acoustic coupling between a bone conduction hearing device (BCHD) and a patient'"'"'s head or skull, the BCHD comprising a transducer configured to generate sound signals for transmission to the patient'"'"'s skull, the method comprising applying an aqueous acoustically conductive gel or paste to a bottom surface of the BCHD, and attaching, securing or magnetically coupling the BCHD to or against the patient'"'"'s head or skull;

wherein at least portions of the acoustically conductive gel or paste are operably disposed between the bottom surface of the BCHD and the patient'"'"'s head or skull thereby to improve acoustic coupling and transmission of the audible frequency components of sound signals generated by the transducer to the patient'"'"'s skull, wherein the acoustically conductive gel or paste is water soluble, wherein the transducer is an electromagnetic (“

EM”

) transducer, wherein the sound velocity of the acoustically conductive gel or paste ranges between 1,450 meters/second and 1,700 meters/second, wherein a baseplate or spacer is operably connected to or forms a portion of the BCHD and is operably attached to or forms a portion of the transducer, and wherein the acoustically conductive gel or paste has a pH between 5.5and 6.5.

2. The method of claim 1, wherein the BCHD further comprises a piezoelectric transducer.

3. The method of claim 1, wherein the BCHD is a magnetic BCHD.

4. The method of claim 3, wherein a magnetic implant is attached to or in the patient'"'"'s skull beneath the patient'"'"'s skin at an implant location, and is configured to magnetically couple to the magnetic BCHD.

5. The method of claim 4, wherein the magnetic BCHD is magnetically attached to the patient'"'"'s skull over the implant location.

6. The method of claim 1, further comprising attaching or securing the BCHD to the patient'"'"'s skull or head with at least one of a strap, a head strap, a band, a clip, and a hair clip.

7. The method of claim 1, wherein the acoustically conductive gel or paste comprises at least one of one or more of a cross-linked polyacrylate polymer, polyalkenyl ether, divinyl glycol propylene, glycol, glycerin, a carbomer, a carbopol, theolaimne, aloe vera, carrageenan, EDTA (Ethylenediaminetetraacetic acid), salt, vitamin E, a preservative, a thickening agent, and a neutralizer.

8. The method of claim 1, wherein the acoustically, conductive gel or paste is at least one of colorless, non-sterile, bacteriostatic, non-sensitizing to human skin, non-irritating to human skin, biocompatible, orally compatible, and ingestible.

9. The method of claim 1, wherein the viscosity of the acoustically conductive gel or, paste ranges between 10 Pascal-seconds and 20 Pascal-seconds.

10. The method of claim 1, wherein the viscosity of the acoustically conductive gel or, paste is sufficient to remain attached to the baseplate or spacer when applied thereon in a layer having a thickness ranging between 1 mm and 2 mm.

11. The method of claim 1, wherein the acoustically conductive gel or paste has an acoustic impedance similar to soft human body tissue.

12. A bone conduction hearing device (BCHD), comprising:

a transducer configured to generate sound signals for transmission to the patient'"'"'s skull;

a bottom surface, and an acoustically conductive gel or paste disposed on at least portions of the bottom surface;

wherein when the BCHD is attached, secured or magnetically coupled to a patient'"'"'s skull or head at least portions of the acoustically conductive gel or paste are disposed between the bottom surface and the patient'"'"'s head or skull thereby to improve acoustic coupling and transmission of the audible frequency components of sound signals originating from the transducer to the patient'"'"'s skull, wherein the transducer is an electromagnetic (“

EM”

) to transducer, wherein the acoustically conductive gel or paste is water soluble, wherein the sound velocity of the acoustically conductive gel or paste ranges between 1,450 meters/second and 1,700 meters/second, wherein a baseplate or spacer is operably connected to or forms a portion of the BCHD, and the baseplate or spacer is operably attached to or forms a portion of the transducer, and wherein the acoustically conductive gel or paste has a pH between 5.5 and 6.5.

13. The BCHD of claim 12, further comprising a piezoelectric transducer.

14. The BCHD of claim 12, wherein a magnetic implant is attached to or in the patient'"'"'s skull beneath the patient'"'"'s skin at an implant location, and is configured to magnetically couple to the magnetic BCHD.

15. The BCHD of claim 14, wherein the magnetic BCHD is configured to be magnetically attached to the patient'"'"'s skull over the implant location.

16. The BCHD of claim 12, further comprising at least one of a strap, a head strap, la band, a clip, and a hair clip configured to attach or secure the BCHD to the patient'"'"'s skull or head.

17. The BCHD of claim 12, wherein the acoustically conductive gel or paste comprises at least one of one or more of a cross-linked polyacrylate polymer, polyalkenyl ether, divinyl glycol propylene, glycol, glycerin, a carbomer, a carbopol, theolamme, aloe vera, carrageenan, EDTA (Ethylenediaminetetraacetic acid), salt, vitamin E, a preservative, a thickening agent, and a neutralizer.

18. The BCHD of claim 12, wherein the acoustically conductive gel or paste is at least one of colorless, non-sterile, bacteriostatic, non-sensitizing to human skin, nonirritating to human skin, biocompatible, orally compatible, and ingestible.

19. The BCHD of claim 12, wherein the viscosity of the acoustically conductive gel or paste ranges between 10 Pascal-seconds and 20 Pascal-seconds.

20. The BCHD of claim 12, wherein the viscosity of the acoustically conductive gel or paste is sufficient to remain attached to the baseplate or spacer when applied thereon in a layer having a thickness ranging between 1 mm and 2 mm.

21. The BCHD of claim 12, wherein the acoustically conductive gel or paste has an acoustic impedance similar to soft human body tissue.

22. A bone conduction hearing device (BCHD) kit, comprising:

a BCHD comprising a transducer configured to generate sound signals for transmission to the patient'"'"'s skull and a bottom surface, and an acoustically conductive gel or paste configured to be disposed on at least portions of the bottom surface;

wherein when the BCHD is attached, secured or magnetically coupled to a patient'"'"'s skull or head at least portions of the acoustically conductive gel or paste can be disposed between the bottom surface and the patient'"'"'s head or skull thereby to improve acoustic coupling and transmission of the audible frequency components of sound signals originating from the transducer to the patient'"'"'s skull, wherein the transducer is an electromagnetic (“

EM”

) transducer, wherein the acoustically conductive gel or paste is water soluble, wherein the sound velocity of the acoustically conductive gel or paste ranges between 1,450 meters/second and 1,700 meters/second, wherein a baseplate or spacer is operably connected to or forms a portion of the BCHD and the baseplate or spacer is operably attached to or forms a portion of the transducer, and wherein the acoustically conductive gel or paste has a pH between 5.5 and 6.5.

23. The BCHD kit of claim 22, further comprising a piezoelectric transducer.

24. The BCHD kit of claim 23, further comprising a magnetic implant configured to be attached to or in the patient'"'"'s skull beneath the patient'"'"'s skin at an implant location, and for magnetic coupling to the magnetic BCHD.

25. The BCHD kit of claim 24, wherein the magnetic BCHD is configured to be magnetically attached to the patient'"'"'s skull over the implant location.

26. The BCHD kit of claim 22, further comprising at least one of a strap, a head strap, a band, a clip, and a hair clip configured to attach or secure the BCHD to the patient'"'"'s skull or head.

27. The BCHD kit of claim 22, wherein the acoustically conductive gel or paste comprises at least one of one or more of a cross-linked polyacrylate polymer, polyalkenyl ether, divinyl glycol propylene, glycol, glycerin, a carbomer, a carbopol, theolamine, aloe vera, carrageenan, EDTA (Ethylenediaminetetraacetic acid), salt, vitamin E, a preservative, a thickening agent, and a neutralizer.

28. The BCHD kit of claim 22, wherein the acoustically conductive gel or paste is at least one of colorless, non-sterile, bacteriostatic, non-sensitizing to human skin, non-irritating to human skin, biocompatible, orally compatible, and ingestible.

29. The BCHD kit of claim 22, wherein the viscosity of the acoustically conductive gel or paste ranges between 10 Pascal-seconds and 20 Pascal-seconds.

30. The BCHD kit of claim 22, wherein the viscosity of the acoustically conductive gel or paste is sufficient to remain attached to the baseplate or spacer when applied thereon in a layer having a thickness ranging between 1 mm and 2 mm.

31. The BCHD kit of claim 22, wherein the acoustically conductive gel or paste has an acoustic impedance similar to soft human body tissue.

32. An aqueous acoustically conductive gel or paste configured for use with a bone conduction hearing device (BCHD), the acoustically conductive gel or paste comprising a cross-linked system of one or more polymers, the acoustically conductive gel or paste having a viscosity sufficient to stick to a bottom surface of the BCHD after having been disposed thereon by a user, the BCHD comprising a transducer configured to generate sound signals for transmission to a patient'"'"'s skull, wherein the transducer is an electromagnetic (“

EM”

) transducer, wherein the acoustically conductive gel or paste is configured for use in conjunction with the BCHD by being disposed over at least portions of the bottom surface and between the bottom surface and the patient'"'"'s skull when the BCHD is secured, attached or magnetically coupled to the patient'"'"'s head or skull, and the acoustically conductive gel or paste is further configured to improve acoustic coupling and transmission of the audible frequency components of sound signals originating from the transducer to the patient'"'"'s skull, wherein the acoustically conductive gel or paste is water soluble, wherein the sound velocity of the acoustically conductive gel or paste ranges between 1,450 meters/second and 1,700 meters/second, and wherein the acoustically conductive gel or paste has a pH between 5.5 and 6.5.

33. The acoustically conductive gel or paste of claim 32, wherein the acoustically, conductive gel or paste comprises at least one of one or more of a cross-linked polyacrylate polymer, polyalkenyl ether, divinyl glycol propylene, glycol, glycerin, a carbomer, a carbopol, theolarnine, aloe vera, carrageenan, EDTA (Ethylenediaminetetraacetic acid), salt, vitamin E, a preservative, a thickening agent, and a neutralizer.

34. The acoustically conductive gel or paste of claim 32, wherein the acoustically conductive gel or paste is at least one of colorless, non-sterile, bacteriostatic, non-sensitizing to human skin, non-irritating to human skin, biocompatible, orally compatible, and ingestible.

35. The acoustically conductive gel or paste of claim 32, wherein the viscosity of the acoustically conductive gel or paste ranges between 10 Pascal-seconds and 20 Pascal-seconds.

36. The acoustically conductive gel or paste of claim 32, wherein the viscosity of the acoustically conductive gel or paste is sufficient to remain attached to the baseplate or spacer when applied thereon in a layer having a thickness ranging between 1 mm and 2 mm.

37. The acoustically conductive gel or paste of claim 32, wherein the acoustically conductive gel or paste has an acoustic impedance similar to soft human body tissue.