Hearing aid fitting system

• US 6,201,875 B1
• Filed: 03/17/1998
• Issued: 03/13/2001
• Est. Priority Date: 03/17/1998
• Status: Expired due to Term

• Current Assignee: Brigham Young University (The Church of Jesus Christ of Latter-Day Saints), Sonic Innovations Incorporated (William Demant Fonden)
• Original Assignee: Sonic Innovations Incorporated (William Demant Fonden)
• Inventors: Fang, Xiaoling, Davis, Keith L., Rose, Darrell, Chabries, Douglas M.
• Primary Examiner(s): LE, HUYEN D
• Application Number:
  US09/040,503
• Time in Patent Office: 1,092 Days
• Field of Search: 381/60, 381/312, 381/314, 381/320, 381/321, 128/246, 735/85, 600/559
• US Class Current: 381/314
• CPC Class Codes: H04R 25/505 using digital signal processing
• CPC Class Codes: H04R 25/70 Adaptation of deaf aid to hearing loss, e.g. initial electronic fitting

Abstract

A method for fitting a hearing compensation device comprises selecting a plurality of loudness levels for a plurality of frequencies and comparing each loudness level for each frequency for perceived sameness. The loudness levels may then be adjusted as needed to achieve perceived sameness across the frequency spectrum. A gain curve for each frequency is calculated from the selected plurality of loudness levels.

Claims

1. A method for fitting a hearing aid device comprising the steps of:

providing a set of stimuli comprising a plurality of loudness levels for each of a plurality of selected frequencies;

determining an individual'"'"'s perceived response to each said stimulus;

determining a plurality of gain compensation factors for said plurality of loudness levels at said plurality of frequencies;

adjusting said plurality of gain compensation factors each corresponding to one of said frequencies or one of said stimuli to achieve a same perceived loudness across the entire frequency spectrum; and

plotting a gain compensation curve to indicate the measure of gain compensation required by the individual.

2. A method according to claim 1, wherein each of the said plurality of loudness levels is represented as a loudness curve on a perceived loudness interface.

3. A method according to claim 2, wherein the center frequency in each frequency band for each of the loudness levels is indicated by a marker.

4. A method according to claim 3, wherein a computer pointing device can be used to select any of the markers.

5. A method according to claim 4, wherein the selection of any of the markers by the individual generates a stimulus having a frequency and loudness level corresponding to the selected marker.

6. A method according to claim 5, wherein said stimulus is generated by the hearing aid upon receiving a command via a serial interface device.

7. A method according to claim 5, wherein the frequency of the stimulus corresponds to the X axis position of the selected marker and the loudness of the stimulus corresponds to the Y axis position of the selected marker.

8. A method according to claim 5, wherein the loudness of the stimulus corresponding to one of the markers can be adjusted by the individual to make the perceived sound either louder or softer.

9. A method according to claim 5, wherein each marker on a selected loudness curve is perceived as having the same loudness level as each of the other markers on the selected loudness curve.

10. A method according to claim 5, wherein the perception of loudness of an individual at multiple levels is measured and compared with perceived loudness across frequency bands for different dynamic levels.

11. A method according to claim 5, wherein each of said loudness curves can also be selected to be fixed in place by freeze controls.

12. A method according to claim 2, wherein each of said loudness curves can be selected to be hidden from view by using hide controls.

13. A method according to claim 2, wherein a hearing compensation curve can be formed for each of the frequency bands from data obtained from tie loudness caves.

14. A method according to claim 1, wherein said loudness levels range from very soft to uncomfortably loud across the entire hearing frequency spectrum.

15. A method according to claim 1, wherein the hearing loss of the individual is assessed by the tones generated by the hearing aid to be worn by the individual.

16. A method according to claim 1, wherein said gain compensation curve has a plurality of regions each of said regions denoting a hearing aid gain function.

17. A method according to claim 16, wherein said gain compensation curve has three regions.

18. A method for fitting a hearing aid device comprising the steps of:

providing a set of stimuli comprising a plurality of loudness levels for each of a plurality of selected frequencies;

determining an individual'"'"'s perceived response to each stimulus;

determining a plurality of gain compensation factors for said plurality of loudness levels at said plurality of frequencies, wherein the center frequency band for each of the loudness levels is indicated by a marker and a computer pointing device can be used to select any of the makers, and wherein selection of any of the makers by the individual generates a stimulus having a frequency and loudness level corresponding to the selected marker;

determining an individual'"'"'s perceived response to each said stimulus;

determining a plurality of gain compensation for said plurality of loudness levels at said plurality of frequencies;

adjusting said plurality of gain compensation factors each corresponding to one of said frequencies or one of said stimuli to achieve a same perceived loudness across the entire frequency spectrum; and

plotting a gain compensation curve to indicate the measure of gain compensation required by the individual,

wherein the stimulus associated with each makers is to be positioned by the individual on each of the loudness curves.