Hearing Device Feedback Threshold Prioritization
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Solution Overview
Problem
Existing methods for determining feedback thresholds in hearing devices are inefficient in noisy environments, particularly in pediatric settings, where intermittent noise and discomfort can lead to incomplete or inaccurate measurements, compromising the effectiveness of feedback cancellation and limiting the use of hearing devices for individuals with significant hearing loss.
Innovation Solution
A method that prioritizes the determination of feedback thresholds in frequency bands or frequencies based on importance, allowing for interrupted sequences to minimize repetition and using noise penalties, edge penalties, and quality indices to ensure accurate maximum gain settings, even in noisy conditions, with optional interpolation and extrapolation to complete the measurement set.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If feedback threshold determination is performed in a noisy environment, then measurement speed is improved, but measurement accuracy deteriorates
Solution Approach 1:
The patent segments the feedback threshold determination into multiple frequency bands and performs measurements in an optimized sequence. By dividing the measurement task into frequency-specific segments and measuring them in order of importance, the system can complete critical measurements quickly while minimizing the impact of noise on overall accuracy.
Solution Approach 2:
The patent performs preliminary identification of frequency bands most susceptible to feedback before conducting full measurements. By determining which frequency bands are most important in advance and measuring them first, the system ensures that critical feedback thresholds are captured accurately even if the measurement is interrupted by noise or patient discomfort.
2Measurement precision
If complete series of feedback threshold measurements are performed across all frequency bands, then measurement accuracy is improved, but measurement time increases
Solution Approach 1:
The patent divides the frequency spectrum into multiple bands and determines an optimal measurement sequence based on importance. This segmentation allows the system to prioritize measurements in frequency bands most likely to exhibit feedback, completing essential measurements faster while maintaining accuracy where it matters most.
Solution Approach 2:
The patent implements a tiered measurement approach where critical frequency bands are measured with high priority and sufficient detail, while less critical bands receive reduced measurement effort or are skipped entirely if time constraints arise. This partial action ensures adequate feedback cancellation performance without requiring exhaustive measurement of all frequency bands.
3Reliability
If gain is limited to prevent feedback, then feedback cancellation is improved, but hearing device performance deteriorates
Solution Approach 1:
The patent applies gain limitation locally and selectively based on measured feedback thresholds for each frequency band. Instead of uniformly limiting gain across all frequencies, the system identifies specific frequency bands where feedback occurs and applies gain reduction only in those bands, maintaining high gain performance in frequency ranges where feedback is not an issue.
Solution Approach 2:
The patent uses measured feedback threshold information to dynamically adjust gain settings. By continuously monitoring feedback conditions and adapting gain limits based on actual measurements, the system achieves effective feedback cancellation while maximizing hearing device performance within safe operating boundaries.
Data Source
AI summary
A method for determining feedback thresholds in a plurality of frequency bands and/or at a plurality of frequencies processed by a hearing device is disclosed. The feedback thresholds are defined as gains, at which feedback occurs while a hearing device user is wearing the hearing device. The method comprises the step of determining feedback thresholds in an order of precedence, wherein the order of precedence being defined according to a degree of importance that the feedback threshold is determined in a particular frequency band or at a particular frequency, respectively.