Hearing Aid Adaptive Classifier for Program Selection Stability
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Solution Overview
Problem
Modern hearing aids face challenges in minimizing the risk of undesired program changes, as they struggle to accurately classify auditory environments and adapt signal processing modes effectively, leading to suboptimal sound amplification and noise suppression.
Innovation Solution
A hearing system that includes a hearing aid and a personal communication device, connected via a short-range data transceiver, which uses a classifier to analyze specific characteristics of the audio signal, compare them to thresholds, and automatically select the appropriate signal processing mode, with the ability to adjust these thresholds based on user interaction and environmental data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the hearing aid uses automatic program selection based on classifier analysis, then adaptability to different auditory environments is improved, but the risk of undesired program changes increases
Solution Approach 1:
The system performs preliminary classification of auditory environments before making program selection decisions. The classifier analyzes signal characteristics and compares them to thresholds in advance, allowing the system to prepare for appropriate program changes while avoiding impulsive or undesired switches. This preliminary analysis stabilizes program selection by ensuring changes occur only when environmental conditions genuinely warrant them.
Solution Approach 2:
The system incorporates feedback mechanisms where the classifier continuously monitors auditory environment characteristics and adjusts program selection based on this ongoing analysis. The feedback loop allows the system to learn from previous classifications and refine its threshold comparisons, improving both adaptability to changing environments and stability against spurious program changes.
2Measurement precision
If the hearing aid uses sophisticated signal processing for speech intelligibility improvement, then speech clarity is enhanced, but device complexity increases
Solution Approach 1:
The signal processing system is divided into distinct functional segments: a classifier component that analyzes auditory environments, a program selector that chooses appropriate processing modes, and specific signal processing subsystems that execute targeted enhancements. This segmentation allows sophisticated speech intelligibility improvement through multiple specialized functions while managing overall device complexity by organizing processing tasks into modular, independent components.
3Object-affected harmful factors
If the hearing aid continuously monitors and classifies auditory environments, then noise suppression is improved, but energy consumption increases
Solution Approach 1:
The classifier monitors auditory environment characteristics at periodic intervals rather than continuously, analyzing signal characteristics and comparing them to thresholds at defined sampling rates. This periodic action maintains effective noise suppression by regularly updating environmental classification while significantly reducing energy consumption compared to continuous monitoring. The system adjusts the periodicity based on environmental stability to optimize the balance between noise suppression performance and power usage.
Data Source
AI summary
A hearing system includes a hearing aid (10) and personal communication device (20) connected via a short range data communication link. The hearing aid has a signal processor (13) processing an audio signal according to audio processing parameters, a sub-system applying respective sets of processing parameters for at least two modes, a classifier component (51) statistically analyzing the environment by comparing specific characteristics of an electrical input signal to one or more thresholds. A program selector component (16) selects automatically an appropriate mode for the signal processing sub-system according to the classifier output. The personal communication device offers the user an interface for controlling and interacting with the program selector component of the hearing aid, and for generating and transmitting a notification to the hearing aid. Upon reception of the notification, the processor adjusts at least one of the one or more thresholds used by the classifier component.