Hearing Aid Microphone Directionality Adaptation
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Solution Overview
Problem
Hearing assistance devices struggle to effectively distinguish speech from environmental noise due to limitations in directional microphone technology, which often require accessory devices for customization and fail to adapt to changing environments, leading to missed information and incorrect signal focus.
Innovation Solution
A hearing assistance system that allows direct customization of directional microphone polar patterns using a processor, positional sensors, and user interfaces, enabling the wearer to interactively adjust microphone sensitivity and attenuation based on three-dimensional sound source positioning without the need for accessory devices, improving signal-to-noise ratio in noisy environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If directional microphone technology is used to distinguish speech from environmental noise, then signal-to-noise ratio is improved, but device complexity increases due to requirement of accessory devices for customization
Solution Approach 1:
The patent combines the customization functionality directly into the hearing assistance device itself, merging the microphone array, processor, and user interface into a single integrated unit. This eliminates the need for separate accessory devices while maintaining the ability to customize directional patterns for noise suppression.
Solution Approach 2:
The hearing assistance device performs self-customization through its built-in processor and user interface, allowing the wearer to directly adjust directional microphone patterns without external accessories. The device serves itself by providing all necessary customization capabilities internally.
2Device complexity
If fixed directional microphone patterns are used, then device complexity is reduced, but adaptability to changing environments deteriorates
Solution Approach 1:
The patent implements dynamic directional microphone patterns that can be adjusted in real-time based on environmental conditions. The processor enables the microphone array to adapt its directional characteristics dynamically, allowing the device to respond to changing acoustic environments while maintaining manageable complexity through algorithmic control.
Solution Approach 2:
The system changes the directional parameters of the microphone patterns dynamically. The processor modifies the directional characteristics (such as beam width and orientation) based on environmental feedback, enabling adaptability without requiring a completely different hardware configuration.
3Ease of operation
If automatic signal focus is used, then ease of operation is improved, but measurement precision of sound source positioning deteriorates
Solution Approach 1:
The patent incorporates feedback mechanisms where the processor continuously analyzes acoustic input and adjusts the directional focus accordingly. This feedback loop maintains automatic ease of operation while improving measurement precision by using real-time acoustic data to refine sound source positioning accuracy.
Data Source
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AI summary
A hearing assistance system comprises a left ear device and a right ear device respectively configured to be worn by a wearer. One or more microphones are provided at each of the left and right ear devices. One or more positional sensors are configured to determine a three-dimensional position of the hearing assistance system in response to the wearer looking at a sound source in space. A user interface is configured to receive an input directly from the wearer. A memory is configured to store the three-dimensional position of the hearing assistance system in response to the received input. A processor is configured to adjust a directional polar pattern of the one or more microphones provided at one or both of the left and right ear devices in response to the stored three-dimensional position.