Light activated hearing aid device

• US 8,545,383 B2
• Filed: 01/30/2009
• Issued: 10/01/2013
• Est. Priority Date: 01/30/2009
• Status: Active Grant

• Current Assignee: Medizinische Hochschule Hannover
• Original Assignee: Medizinische Hochschule Hannover
• Inventors: Wenzel, Gentiana I., Lim, Hubert H., Lenarz, Thomas, Lubatschowski, Holger
• Primary Examiner(s): Marmor, II, Charles A
• Assistant Examiner(s): KUHLMAN, CATHERINE BURK
• Application Number:
  US12/363,291
• Publication Number:
  US 20100197995A1
• Time in Patent Office: 1,705 Days
• Field of Search: 600/25, 381/23.1, 381/60, 381312-331, D24174-175, 320/DIG.26
• US Class Current: 600/25
• CPC Class Codes: H04R 2225/67 Implantable hearing aids or parts thereof not covered by H04R25/606
• CPC Class Codes: H04R 25/604 of acoustic or vibrational 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: Y10T 29/49826 Assembling or joining

Abstract

The invention relates to a hearing aid device for humans with impaired hearing, who have an at least partially functional cochlea and a functional nervous signalling pathway from the cochlea via the auditory nerve to the brain. The hearing aid device contains a receiver, a transducer of the sound or other acoustic signals into electrical current serving as a signal representing a sound, a pulsed irradiation source connected to the transducer for receiving the electrical current and for generating modulated pulsed irradiation in dependence from the electrical current, and preferably one or more optical fibers optically coupled to the exit of the pulsed irradiation source, wherein the optical path for conduction of irradiation within the device ends directly opposite a functional element of the natural vibration transduction pathway, e.g. adjacent the skull, the tympanic membrane, the hammer, the incus, the stapes, the outside of the cochlea, the otic capsule, the round window membrane, or the oval window membrane.

Claims

1. A process for improving hearing perception in a human with an at least partially functional cochlea comprising:

the steps of

producing pulsed irradiation in a pulsed light source,

receiving an acoustic signal and generating a signal representing an acoustic signal,

controlling and modulating the intensity and frequency of the pulsed irradiation in response to the signal representing an acoustic signal,

conducting the pulsed irradiation by at least one optical fibre optically coupled to the pulsed light source to an output surface of the optical fibre opposite the pulsed light source and emitting the irradiation from the output surface onto and directly in front of is functional element of the natural vibration transduction pathway, directly stimulating the functional element by the pulses generated within the pulsed light source,

which functional element is functionally coupled for transduction of vibration to the cochlea and is selected from the group comprising the skull, the tympanic membrane, the hammer, the incus, the stapes, the outside of the cochlea, the otic capsule, the round window membrane, and the oval window membrane.

2. The process according to claim 1, wherein the pulsed light source is a pulsed laser.

3. The process according to claim 1, wherein the output surface is the cross-sectional surface of an optical fibre.

4. The process according to claim 1, wherein the output surface is a surface of as lens arranged at the cross-sectional surface of an optical fibre.

5. The process according to claim 1, wherein the output surface is arranged in an angle of 0 to 90°

from the longitudinal fibre axis.

6. The process according to claim 1, wherein the output surface is spaced by a distance of 0.1 μ

m-5 cm from the functional element.

7. A process for improving hearing perception in a human with an at least partially functional cochlea comprising the steps of

receiving, an acoustic signal and generating a signal representing an acoustic signal,

producing pulsed irradiation in a pulsed light source having an output surface for emitting irradiation,

controlling and modulating the intensity and frequency of the pulsed irradiation,

emitting the irradiation from the output surface onto and directly in front of a functional element of the natural vibration transduction pathway, directly stimulating the functional element by the pulses generated within the pulsed light source,

which functional element is functionally coupled for transduction of vibration to the cochlea and is selected from the group comprising the skull, the tympanic membrane, the hammer, the incus, the stapes, the outside of the cochlea, the ode capsule, the round window membrane, and the oval window membrane.

8. The process according to claim 7, wherein the pulsed light source is a pulsed laser.

9. The process according to claim 7, wherein the output surface is arranged in an angle of 0 to 90°

from the longitudinal axis of the pulsed light source.

10. The process according to claim 7, wherein the output surface is spaced by a distance of 0.1 μ

m-5 cm from the functional element.

11. A process for producing and using a hearing aid device for a hearing impaired human having an at least partially functional cochlea, the process comprising the steps of

providing a pulsed light source capable of producing pulsed irradiation,

coupling a control unit to the pulsed light source for controlling and modulating the frequency of pulsed irradiation, and

optically coupling at least one optical fibre to the pulsed light source for reception of pulsed irradiation produced by the pulsed light source,

arranging the pulsed light source and the optical fibre to form an optical path terminating in an output surface emitting pulsed irradiation from the end section of the optical fibre opposite the pulsed light source,

and dimensioning the optical fibre for termination in the output surface adjacent to and spaced from an at least partially functional element of the natural vibration transduction pathway of the human for transmission of irradiation to the output surface to stimulate the functional element of the natural vibration conduction pathway,

directly stimulating the functional element by the pulses generated within the pulsed light source,

which functional element is functionally coupled for transduction of vibration to the cochlea and is selected from the group comprising the skull the tympanic membrane, the hammer, the incus, the stapes, the outside of the cochlea, the otic capsule, the round window membrane, and the oval window membrane.

12. The process according to claim 11, wherein the pulsed light source is a pulsed laser.

13. The process according to claim 11, wherein the output surface is the cross-sectional surface of an optical fibre.

14. The process according to claim 11, wherein the output surface is a surface of a lens arranged at the cross-sectional surface of an optical fibre.

15. The process according to claim 11, wherein the output surface is arranged in an angle of 0 to 90°

from the longitudinal fibre axis.

16. The process according to claim 11, wherein the output surface is spaced by a distance of 0.1 μ

m-5 cm from the functional element.

17. A process for producing and using a hearing aid device for a hearing impaired human having an at least partially functional cochlea, the process comprising the steps of

providing a pulsed light source capable of producing pulsed irradiation,

coupling a control unit to the pulsed light source for controlling and modulating the frequency of pulsed irradiation, and

arranging the pulsed light source to form an optical path terminating in an output surface emitting pulsed irradiation,

dimensioning the pulsed light source for termination in the output surface adjacent to and spaced from an at least partially functional element of the natural vibration transduction pathway for transmission of pulsed irradiation to the output surface to stimulate the functional element of the natural vibration conduction pathway,

directly stimulating the functional element by the pulses generated within the pulsed light source,

which functional element is functionally coupled for transduction of vibration to the cochlea and is selected from the group comprising the skull the tympanic membrane, the hammer, the incus, the stapes, the outside of the cochlea, the otic capsule, the round window membrane, and the oval window membrane.

18. The process according to claim 17, wherein the pulsed light source is a pulsed laser.

19. The process according to claim 17, wherein the output surface is the cross-sectional surface of an optical fibre.

20. The process according to claim 17, wherein the output surface is a surface of a lens arranged at the cross-sectional surface of an optical fibre.

21. The process according to claim 17, wherein the output surface is arranged in an angle of 0 to 90°

from the longitudinal fibre axis.

22. The process according to claim 17, wherein the output surface is spaced by a distance of 0.1 μ

m-5 cm from the functional element.