Auto-fit hearing aid and fitting process therefor
Improved approaches of designing and fitting hearing aids to make hearing aids more accessible to people with hearing loss are disclosed. The hearing aids can be capable of being fitted by users themselves or by other non-hearing specialists. In one embodiment a hearing aid can be self-calibrating. In another embodiment, hearing aids can be fitted, i.e., configured, for individuals with hearing loss using a simplified procedure that hearing aid users or non-hearing specialists can easily follow.
1. An automated fitting procedure for a hearing aid device, comprising:
providing initial setup for the hearing aid device; the initial setup includes at least calculating initial settings from hearing loss data, performing an ear environment calibration, or playing sound samples in background;
searching for optimized volume settings using first predefined volume step sizes selected to provide convergence toward the optimized volume settings;
searching for optimized volume settings using second predefined volume step sizes selected to refine the optimal volume settings, the first predefined volume step sizes being larger than the second predefined volume step sizes;
searching for optimized equalization settings using first predefined equalization step sizes selected to provide convergence toward the optimized equalization settings;
searching for optimized equalization settings using second predefined equalization step sizes selected to refine the optimal equalization settings, the second predefined equalization step sizes being smaller than the first predefined equalization step sizes; and
programming the hearing aid device for calibration and acoustic feedback cancellation in accordance with the optimized volume settings and the optimized equalization settings;
wherein said optimized volume settings and said optimized equalization settings each include at least a first, second, third, fourth, and fifth setting, respectively, and said searching for optimized volume settings and said searching for optimized equalization settings each comprises conducting adaptive paired comparisons, including:
comparing said first setting to said second setting;
if said first setting is preferred, comparing said first setting to said fourth setting;
if said first setting is still preferred, applying said first setting;
if said fourth setting is preferred instead, comparing said fourth setting to said fifth setting;
if said fourth setting is still preferred, applying said fourth setting; and
if said fifth setting is preferred instead, applying said fifth setting.
2. A method as recited in claim 1 , wherein said automated fitting procedure requires user interaction to initiate and to perform said searching for optimized volume settings and said searching for optimized equalization settings.
3. A method as recited in claim 1 , wherein said automated fitting procedure requires no interaction by a hearing aid professional to perform said automated fitting procedure.
4. A method as recited in claim 1 , wherein the hearing aid device is self-calibrated for an ear environment calibration.
5. A method as recited in claim 1 , wherein the steps of searching for optimized volume settings and the steps of searching for optimized equalization settings comprise conducting adaptive paired comparisons in order to identify a best volume setting and a best equalization setting among all adaptive paired comparisons.
6. A digital hearing aid as recited in claim 1 , wherein:
if said second setting is preferred instead over said first setting, comparing said second setting to said third setting;
if said second setting is still preferred, applying said second setting; and
if said third setting is preferred instead, applying said third setting.