Method and device for automated observation fitting

• US 8,798,757 B2
• Filed: 05/08/2007
• Issued: 08/05/2014
• Est. Priority Date: 05/08/2006
• Status: Active Grant

• Current Assignee: Cochlear Limited
• Original Assignee: Cochlear Limited
• Inventors: Van den Heuvel, Koen
• Primary Examiner(s): Porter, Jr., Allen
• Application Number:
  US12/299,773
• Publication Number:
  US 20090306743A1
• Time in Patent Office: 2,646 Days
• Field of Search: 607 55- 57
• US Class Current: 607/57
• CPC Class Codes: A61N 1/36039 fitting procedures
• CPC Class Codes: A61N 1/37235 Aspects of the external programmer
• CPC Class Codes: H04R 25/70 Adaptation of deaf aid to hearing loss, e.g. initial electronic fitting

Abstract

Fitting an auditory prosthesis to a recipient by automatically determining operational thresholds of the prosthesis based on changes in the activity of the recipient that occur in response to applied stimulation signals. Such changes in recipient activity are detected by an inertial measurement unit (IMU) permanently or temporarily secured to or implanted in the recipient as an integral part of the prosthesis or a separate device operationally coupled to the prosthesis.

Claims

1. A method for fitting an auditory prosthesis to a recipient, comprising:

applying, via the auditory prosthesis, at least one stimulation signal having one or more characteristics to the recipient;

generating, via an inertial measurement unit, inertia data indicating changes in the recipient'"'"'s physical activity;

assigning, with a determinator, a confidence value to said one or more characteristics of said at least one stimulation signal based on said inertia data, wherein said confidence value is representative of a likelihood a recipient has experienced a change in hearing perception;

comparing, with the determinator, said confidence value with a predetermined confidence threshold;

determining, via the determinator, whether said recipient experienced a change in hearing perception in response to the applied at least one stimulation signal based on comparing said confidence value with said predetermined confidence threshold; and

setting, in the auditory prosthesis, at least one operational parameter of the auditory prosthesis in accordance with one or more characteristics of the at least one applied stimulation signal corresponding to a determined change in hearing perception.

2. The method of claim 1, wherein said auditory prosthesis is a cochlear implant.

3. The method of claim 1, wherein said at least one operational parameter comprises:

threshold level (T-level); and

comfort level (C-level).

4. The method of claim 1, wherein said one or more characteristics comprises an amplitude of said applied at least one stimulation signal corresponding to a change in hearing perception.

5. The method of claim 4, wherein said determining comprises:

assigning a confidence value to said amplitude of said at least one stimulation signal based on said inertia data; and

comparing said assigned confidence value with a predetermined confidence threshold.

6. The method of claim 1, wherein said generating comprises generating inertia data by one or more of either a gyroscope and accelerometer.

7. The method of claim 1, wherein said at least one stimulation signal comprises one or more of either an electrical stimulation signal, acoustic stimulation signal, and mechanical stimulation signal.

8. The method of claim 1, wherein the setting comprises:

setting at least one of an movement level (M-level) and an stop level (S-level) in accordance with an amplitude of said applied at least one stimulation signal when said changes in said recipient'"'"'s activity comprises an increase or decrease in recipient'"'"'s activity, respectively, representative of a hearing perception experienced determined to be in response to said applied at least one stimulation signal.

9. The method of claim 8, wherein setting an operational parameter of the auditory prosthesis comprises:

providing at least one of said M-level and said S-level to a fitting system as at least one of either a threshold level (T-level) or comfort level (C-level) of the auditory prosthesis based on a manner in which said at least one of said M-level and said S-level are determined.

10. The method of claim 1,

wherein said one or more characteristics comprises an amplitude of said applied at least one stimulation signal corresponding to a determined change in hearing perception each having substantially the same amplitude,

wherein said applying, generating and determining are performed iteratively with each of said at least one stimulation signals until a predetermined confidence value is obtained.

11. The method of claim 1, wherein said change in recipient'"'"'s activity comprises one or more of the group consisting of:

an increase in recipient'"'"'s activity; and

a decrease in recipient'"'"'s activity.

12. The method of claim 11, wherein said increase in recipient'"'"'s comprises at least one of the group consisting of:

an initiation of recipient activity; and

an increase from a relatively lower degree of activity to a relatively greater degree of activity.

13. The method of claim 11, wherein said decrease in recipient'"'"'s activity comprises at least one of the group consisting of:

a cessation of recipient activity;

an decrease from a relatively higher degree of activity to a relatively lower degree of activity.

14. A system for providing at least one operational parameter to a fitting system of an auditory prosthesis of a recipient, comprising:

an inertial measurement unit constructed and arranged to generate inertia data indicating changes in the recipient'"'"'s physical activity; and

a determinator configured to determine whether said recipient experienced a change in hearing perception in response to applied stimulation signals based on said inertia data, and configured to assign a confidence value to said amplitude of said plurality of said stimulation signals based on said recipient activity changes; and

compare said assigned confidence value with a predetermined confidence threshold representative of a change in hearing perception.

15. The system of claim 14, wherein said auditory prosthesis is a cochlear implant.

16. The system of claim 14, wherein said at least one operational parameter comprises:

threshold level (T-level); and

comfort level (C-level).

17. The method of claim 14, wherein said inertial measurement unit comprises one or more sensors of the group consisting of gyroscopes and accelerometers.

18. The system of claim 14, wherein the fitting system is configured to set an operational parameter of the auditory prosthesis in accordance with one or more characteristics of said applied stimulation signals, and said one or more characteristics of said applied stimulation signals comprises an amplitude of said stimulation signals.

19. The system of claim 14, wherein said plurality of stimulation signals comprises one or more of either electrical stimulation signals, acoustic stimulation signals, and mechanical stimulation signals.

20. The system of claim 14, wherein to determine whether said recipient experienced a change in hearing perception in response to said stimulation signal based on said inertia data, said determinator is configured to set at least one of an movement level (M-level) and an stop level (S-level) in accordance with an amplitude of said stimulation signals when said changes in said recipient activity comprises an increase or decrease in recipient activity, respectively, representative of a hearing perception experienced in response to said stimulation signals.

21. The system of claim 20, wherein said determinator is further configure to provide at least one of said M-level and said S-level to a fitting system as at least one of either a threshold level (T-level) or comfort level (C-level) of the auditory prosthesis based on a manner in which said at least one of said M-level and said S-level are determined.

22. The system of claim 14, wherein said change in recipient activity comprises one or more of the group consisting of:

an increase in recipient activity; and

a decrease in recipient activity.

23. The system of claim 22, wherein said increase in recipient activity comprises at least one of the group consisting of:

a initiation of recipient activity;

an increase from a relatively lower degree of activity to a relatively greater degree of activity.

24. The system of claim 22, wherein said increase in recipient activity comprises at least one of the group consisting of:

a cessation of recipient activity;

an decrease from a relatively higher degree of activity to a relatively lower degree of activity.

25. A system for automatically determining operational parameters of an auditory prosthesis for a recipient, comprising:

an apparatus configured to cause the auditory prosthesis to apply at least one stimulation signal having one or more characteristics to the recipient;

an inertial measurement unit configured to generate inertia data indicating changes in the recipient'"'"'s physical activity; and

a determinator configured to assign a confidence value to said one or more characteristics of said at least one stimulation signal based on said inertia data, wherein said confidence value is representative of a likelihood a recipient has experienced a change in hearing perception, and configured to determine whether said recipient experienced a change in hearing perception in response to said stimulation signals based on comparing the determined confidence value with a predetermined confidence threshold.

26. The system of claim 25, further comprising:

an apparatus configured to set an operational parameter of the auditory prosthesis in accordance with one or more characteristics of said stimulation signals when said determinator determines that changes in said recipient activity reflect a change in hearing perception in the recipient in response to said stimulation signals.

27. The system of claim 26, wherein said one or more characteristics of said stimulation signals comprises an amplitude of said stimulation signals.

28. The system of claim 25, wherein the auditory prosthesis is a cochlear implant.

29. The system of claim 25, wherein said operational parameters comprise one or more of either a threshold level (T-level) and a comfort level (C-level).

30. The system of claim 25, wherein said inertial measurement unit comprises one or more sensors of the group consisting of gyroscopes and accelerometers.

31. The system of claim 25, wherein said plurality of stimulation signals comprises one or more of either electrical stimulation signals, acoustic stimulation signals, and mechanical stimulation signals.

32. The system of claim 25, wherein to determine whether said recipient experienced a change in hearing perception in response to said stimulation signal based on said inertia data, said determinator is configured to set at least one of an movement level (M-level) and an stop level (S-level) in accordance with an amplitude of said stimulation signals when said changes in said recipient activity comprises an increase or decrease in recipient activity, respectively, representative of a hearing perception experienced in response to said stimulation signals.

33. The system of claim 32, wherein said determinator is further configure to provide at least one of said M-level and said S-level to a fitting system as at least one of either a threshold level (T-level) or comfort level (C-level) of the auditory prosthesis based on a manner in which said at least one of said M-level and said S-level are determined.

34. The system of claim 25, wherein said change in recipient activity comprises one or more of the group consisting of:

an increase in recipient activity; and

a decrease in recipient activity.

35. The system of claim 34, wherein said increase in recipient activity comprises at least one of the group consisting of:

an initiation of recipient activity; and

an increase from a relatively lower degree of activity to a relatively greater degree of activity.

36. The system of claim 34, wherein said decrease in recipient activity comprises at least one of the group consisting of:

a cessation of recipient activity;

an decrease from a relatively higher degree of activity to a relatively lower degree of activity.

37. The system of claim 25, wherein one or more characteristics of the amplitude of said applied at least one stimulation signal corresponds to a determined change in hearing perception and wherein said detecting and determining are performed iteratively with each of said at least one stimulation signals until a confidence value is assigned.

38. An apparatus for fitting an auditory prosthesis to a recipient, comprising:

means for applying at least one stimulation signal having one or more characteristics to the recipient;

means for generating inertia data indicating changes in the recipient'"'"'s physical activity;

means for assigning a confidence value to said one or more characteristics of said at least one stimulation signal based on said inertia data, wherein said confidence value is representative of a likelihood a recipient has experienced a change in hearing perception;

means for determining whether said recipient experienced a change in hearing perception in response to said stimulation signal based on comparing said confidence value with said predetermined confidence threshold.

39. The apparatus of claim 38, further comprising:

means for setting an operational parameter of the auditory prosthesis in accordance with one or more characteristics of said at least one stimulation signal when said changes in said recipient activity are determined to have caused a change in hearing perception in the recipient.

40. The apparatus of claim 38, wherein said auditory prosthesis is a cochlear implant.

41. The apparatus of claim 38, wherein said operational parameters comprise threshold level (T-level) or comfort level (C-level).

42. The apparatus of claim 38, wherein said one or more characteristics of said at least one stimulation signal comprises an amplitude of said at least one stimulation signal.

43. The apparatus of claim 38, wherein said at least one stimulation signal comprises one or more of either an electrical stimulation signal, acoustic stimulation signal, and mechanical stimulation signal.

44. The apparatus of claim 38, wherein said means for determining whether said recipient experienced a change in hearing perception in response to said stimulation signal based on said inertia data comprises:

means for setting at least one of an movement level (M-level) and an stop level (S-level) in accordance with an amplitude of said at least one stimulation signal when said changes in said recipient activity comprises an increase or decrease in recipient activity, respectively, representative of a hearing perception experienced in response to said stimulation signals.

45. The apparatus of claim 44, wherein means for setting an operational parameter of the auditory prosthesis comprises:

providing at least one of said M-level and said S-level to a fitting system as at least one of either a threshold level (T-level) or comfort level (C-level) of the auditory prosthesis based on a manner in which said at least one of said M-level and said S-level are determined.