Hearing Aid Attachment State Detection for Mode Switching
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Solution Overview
Problem
Existing hearing assistive devices struggle to adapt their signal processing modes effectively between directional and omni-directional responses based on the use case, such as when attached to a person or placed on a surface, without manual intervention.
Innovation Solution
A hearing assistive device with a multi-microphone system and an attachment element that automatically switches between directional and omni-directional modes based on the attachment state, using a clip mechanism to detect whether it is attached to a person or a surface, thereby controlling the device's processing accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the hearing assistive device uses a fixed directional processing mode, then the user's voice is enhanced when attached to clothing, but background noise cannot be properly captured when placed on a surface
Solution Approach 1:
The patent implements dynamic switching between directional and omni-directional processing modes based on the attachment state detected by the accelerometer. When the device detects movement patterns consistent with being worn on clothing, it activates directional processing to enhance the user's voice. When placed on a stationary surface, it switches to omni-directional processing to capture all surrounding sounds equally.
Solution Approach 2:
The device automatically determines its own operational mode by analyzing accelerometer data to detect whether it is attached to clothing or placed on a surface. This self-diagnosis capability eliminates the need for manual user input or complex external control systems, allowing the device to adapt its signal processing independently based on its physical state.
2Ease of operation
If the device automatically detects attachment state using accelerometer, then manual intervention is eliminated, but the detection system becomes more complex
Solution Approach 1:
The device uses its built-in accelerometer to automatically detect whether it is attached to clothing or placed on a surface, eliminating the need for manual user input. The system self-determines its operational context by analyzing movement patterns and gravitational orientation data, then automatically selects the appropriate signal processing mode without requiring external control.
Solution Approach 2:
The patent replaces manual mechanical switching or user configuration with an automated sensor-based detection system. The accelerometer provides continuous feedback about the device's physical state, and the processor automatically translates this mechanical information into appropriate signal processing mode selection, eliminating the need for manual mechanical switches or user interface interactions.
3Adaptability or versatility
If the device uses omni-directional processing, then all surrounding sounds are captured equally, but the user's voice is not enhanced when attached to clothing
Solution Approach 1:
The signal processing mode dynamically changes based on the detected attachment state. When the accelerometer indicates the device is worn on clothing, the system switches to directional processing that enhances the user's voice. When placed on a surface, it transitions to omni-directional processing for balanced sound capture from all directions.
Solution Approach 2:
The system continuously monitors accelerometer data to detect changes in its physical state and adjusts its signal processing mode accordingly. This feedback loop ensures that the device maintains optimal performance for its current operational context, switching between voice enhancement and balanced sound capture modes as needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device provides improved sound quality by automatically adjusting to the appropriate processing mode based on its attachment state, enhancing the user's voice while reducing background noise, without requiring manual user intervention.
Implementation Method 1
monitoring a current flowing through said first and second mutually movable mechanical parts
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3C
AI summary
A hearing assistive device comprises a multi-microphone system for providing a processed input signal. The multi-microphone system comprises a multitude of microphones for picking up sound from an environment; and a beamformer filter configured to . The hearing assistive device further comprises an attachment element configured to fix the hearing assistive device to the body or clothes of a person. The multi-microphone system is configurable to operate in at least two modes in dependence of a mode control signal, A) a directional mode and B) an omni-directional mode wherein said multi-microphone system is configured to provide said processed input signal as a substantially directional signal, and as a substantially omni-directional signal, respectively. The attachment element is configured to provide an electric signal indicative of a current state of the attachment element. The hearing assistive device further comprises a mode controller for providing said mode control signal in dependence of said electric signal indicative of a current state of the attachment element.