Hearing Aid Feedback Cancellation via Dynamic Microphone Control
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Solution Overview
Problem
Hearing aids experience a feedback phenomenon due to the short distance between the microphone and speaker, leading to amplified sound feedback, which existing technologies have not effectively addressed.
Innovation Solution
An electronic device transmits a control signal to adjust the microphone sensitivity of the hearing aid, inactivating it during certain events like communication to prevent feedback, and processes sound signals to separate user voice from surrounding noise, thereby reducing feedback occurrences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the hearing aid is miniaturized to reduce size for easy installation, then the device becomes more compact and easier to install, but the distance between the microphone and speaker decreases causing feedback phenomenon
Solution Approach 1:
The patent implements dynamic control of microphone sensitivity based on operational state. The electronic device detects whether the hearing aid is in communication mode or normal mode, and dynamically adjusts the microphone sensitivity accordingly - reducing sensitivity during communication to prevent feedback while maintaining it during normal operation for optimal hearing assistance.
Solution Approach 2:
The patent changes the operational parameters of the hearing aid system by adjusting microphone sensitivity as a controllable parameter. The electronic device transmits control signals to modify the microphone's sensitivity parameter, allowing the system to adapt between different operational states (communication vs. normal mode) to eliminate feedback while preserving functionality.
2Measurement precision
If the microphone sensitivity is increased to improve sound collection, then the hearing aid captures more sound signal, but the feedback phenomenon is amplified
Solution Approach 1:
The system dynamically adjusts microphone sensitivity based on the operational context. During communication mode, the electronic device detects the state and transmits a control signal to reduce microphone sensitivity, preventing feedback amplification. During normal mode, the microphone maintains higher sensitivity for improved sound collection, thus resolving the contradiction between detection precision and feedback prevention.
3Adaptability or versatility
If the microphone remains active during communication, then the hearing aid can collect surrounding sounds, but feedback occurs due to speaker sound being picked up by the microphone
Solution Approach 1:
The electronic device performs preliminary detection of the operational state before feedback occurs. When communication mode is detected, the device proactively transmits a control signal to reduce microphone sensitivity in advance, preventing feedback from occurring during speaker output. This preliminary action maintains sound collection capability when needed while preventing feedback during communication.
Data Source
AI summary
A method of operating an electronic device is provided. The method includes transmitting, by the electronic device, a control signal for controlling a microphone sensitivity of a hearing aid, to the hearing aid, and transmitting a reception signal from a counterpart electronic device to the hearing aid.