Hearing Device Wind Noise Cancellation via Motion Sensor
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Solution Overview
Problem
Conventional hearing devices struggle to effectively filter out wind noise without compromising the perception of desired sounds, leading to reduced convenience for users, especially in windy conditions.
Innovation Solution
A hearing device equipped with an adaptive wind noise canceller and a motion sensor, which adjusts the filtering based on the wearer's activity and movement, allowing for real-time optimization of wind noise reduction while minimizing interference with other sounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If comprehensive filtering is carried out to remove wind noises, then wind noise reduction is improved, but desired components in the electrical signal are also removed reducing sound intelligibility
Solution Approach 1:
The wind noise canceller's filter effect is made dynamically adjustable based on motion sensor data. The system transitions from static filtering to dynamic filtering where the filtering strength varies with detected motion levels, allowing optimal balance between wind noise reduction and sound preservation
Solution Approach 2:
The filter parameters of the wind noise canceller are adjusted based on motion detection. When motion exceeds a threshold indicating windy conditions, filtering parameters are changed to increase wind noise removal; when motion is minimal, parameters are adjusted to preserve sound quality
2Object-affected harmful factors
If mechanical shielding is provided for the microphone, then wind noise reduction is improved, but the overall size of the hearing device increases making it conspicuous
Solution Approach 1:
The patent replaces mechanical shielding with an electronic/software-based solution. Instead of adding physical barriers that increase device volume, the system uses a wind noise canceller with digital signal processing to achieve wind noise reduction while maintaining a compact form factor
Solution Approach 2:
The system changes the approach from physical modification (mechanical shielding) to parameter-based control (filtering parameters adjusted via motion detection), achieving wind noise reduction without increasing device dimensions
3Object-affected harmful factors
If fixed filter effect is applied in windy situations, then wind noise reduction is improved, but desired sounds are filtered out in windless situations reducing convenience
Solution Approach 1:
The filtering system transitions from fixed to dynamic operation. The wind noise canceller automatically adapts its filter effect based on real-time motion sensor data, providing strong filtering when motion indicates windy conditions and minimal filtering when motion indicates calm conditions, optimizing convenience across varying environments
Solution Approach 2:
The system incorporates feedback from motion sensors to continuously adjust filtering levels. Motion data provides feedback about environmental conditions, enabling the wind noise canceller to self-adjust and provide optimal performance without user intervention
Data Source
AI summary
A method for operating a hearing device, in particular a hearing aid, which has a wind noise canceller and a motion sensor, includes adjusting the wind noise canceller as a function of measurement data recorded by the motion sensor. A hearing device which is operated according to the method is also provided.