Hearing Device Transfer Function Parameter Adjustment
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Solution Overview
Problem
Modern hearing devices experience sudden and unnatural changes in hearing quality when switching between hearing programs, particularly during automatic transitions, causing confusion for users due to abrupt changes in acoustic signal processing.
Innovation Solution
The method involves detecting desired hearing program changes and adjusting parameters of the hearing device's transfer function using low-pass filters with individually adjustable time constants to achieve smooth transitions, allowing for seamless adaptation to changing acoustic scenes and functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If automatic hearing program switching is implemented, then adaptability to acoustic scenes is improved, but hearing quality stability deteriorates due to sudden and unexpected changes
Solution Approach 1:
The patent applies dynamics by making the transition between hearing programs gradual rather than abrupt. The system dynamically adjusts parameters over time using low-pass filters with adjustable time constants, allowing the hearing device to adapt to acoustic scenes while maintaining stable hearing quality through controlled, smooth transitions.
Solution Approach 2:
The patent changes parameters by using low-pass filters with individually adjustable time constants to control the rate of parameter transitions. This allows the system to modify hearing program parameters smoothly over time, resolving the contradiction between adaptability and stability by controlling the speed and nature of parameter changes.
2Ease of operation
If manual hearing program switching is implemented, then hearing quality control is improved, but operation complexity increases due to user interaction requirements
Solution Approach 1:
The patent applies self-service by implementing automatic acoustic scene classification and hearing program selection. The system autonomously detects acoustic scenes and switches between hearing programs without user interaction, eliminating the need for manual operation while maintaining hearing quality control through intelligent automation.
3Device complexity
If uniform transition time constants are used for all hearing program switches, then device complexity is reduced, but hearing quality smoothness deteriorates for specific transitions
Solution Approach 1:
The patent applies local quality by assigning individually adjustable time constants to different hearing program transitions. Instead of using a uniform time constant for all switches, the system allows each transition to have its own optimized time constant, enabling smooth hearing quality transitions while maintaining manageable device complexity through modular filter design.
Data Source
AI summary
In order to switch between different hearing programs to adjust to a momentary acoustic scene, a method for adjusting a hearing device, in which one of several possible hearing programs can be selected in order to adjust to a momentary acoustic scene, the method comprising the steps of detecting a desired hearing program change, changing parameters (b1, . . . , bm) of a transfer function provided between a microphone (M1) and a receiver of the hearing device in order to adapt it to the detected hearing program change, adjusting the parameters (b1, . . . , bm) to be changed from a momentary value to a desired value in such a manner that a smooth transition is perceived by the hearing device user while changing from a momentary hearing program to the desired hearing program, whereas each of the smooth transition is individually adjustable.