Hearing Aid Signal Processing Using Adaptive Segmentation
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Solution Overview
Problem
Conventional hearing aids often incorrectly classify acoustic situations, leading to unsatisfactory signal selection and potential hiding of important sound sources due to the large number of possible acoustic situations and the need for manual intervention.
Innovation Solution
A method and device that filter and process multiple input signals using adaptive filters and coefficients based on defined signal situations, allowing for targeted amplification or attenuation of specific acoustic components, ensuring important sound sources are not hidden from the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional hearing aids classify acoustic situations based on a large number of possible situations, then signal processing can be adapted to different environments, but incorrect classification occurs leading to unsatisfactory signal selection and potential hiding of important sound sources
Solution Approach 1:
The patent segments the acoustic signal processing into multiple independent output signals, each representing different source components. Instead of relying on a single classification result to select one signal, the system generates multiple parallel processing paths that can be independently evaluated and combined, reducing the impact of classification errors on overall system reliability.
Solution Approach 2:
The patent implements dynamic signal selection and combination mechanisms that allow the hearing aid to adaptively adjust which output signals are provided to the user based on real-time acoustic conditions. This dynamic approach enables the system to correct potential misclassifications by switching between different signal processing modes or combining signals from multiple paths, thereby improving reliability while maintaining adaptability.
2Ease of operation
If manual intervention is required to correct classification or signal selection, then user control over hearing aid functionality is improved, but ease of operation deteriorates due to the complexity of manual adjustments
Solution Approach 1:
The patent implements self-service mechanisms through automatic signal evaluation and selection algorithms that continuously monitor acoustic conditions and adjust signal processing parameters without user intervention. The system automatically identifies and prioritizes important sound sources, dynamically adjusts filtering and amplification, and adapts to changing environments, thereby maintaining ease of operation while eliminating the need for complex manual adjustments.
3Device complexity
If simple amplification of input signal is used, then device complexity is reduced, but interfering signals are also amplified leading to limited benefit for the user
Solution Approach 1:
The patent applies segmentation by dividing the input signal into multiple output signals through filtering and processing, where each output signal represents different acoustic source components. This segmentation allows the system to selectively amplify desired signals while suppressing interfering signals, achieving effective noise reduction without requiring excessively complex processing algorithms, thus balancing device complexity with performance improvement.
Data Source
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AI summary
Method for processing at least one first and one second input signal in a hearing aid, wherein the input signals are filtered to generate intermediate signals, the intermediate signals are added to output signals, the input signals are assigned to a defined signal situation, and wherein the filtering is dependent on the assigned defined signal situation.