Earphone Wearing-State Detection for Adaptive Microphone Switching
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Solution Overview
Problem
Portable audio devices struggle to accurately receive voice data, particularly whispers, due to the user's non-wearing of the earphone unit, leading to improper microphone settings.
Innovation Solution
A portable audio device with a first and second earphone unit, equipped with sensors to detect the wearing state, adjusts the microphone settings based on the earphone unit's wearing state, switching to a microphone mode when not worn, and a voice reception mode when worn.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the portable audio device uses a fixed microphone setting, then the device structure is simple, but the device cannot properly receive voice data when the earphone unit is not worn
Solution Approach 1:
The patent implements dynamic microphone settings that automatically adjust based on the detected wearing state. The processor changes microphone parameters (such as gain, sampling rate, or activation state) according to real-time sensor feedback about whether the earphone is worn, transforming a static system into an adaptive one that optimizes voice reception for each usage scenario.
Solution Approach 2:
The device performs self-diagnosis and self-adjustment by using onboard sensors to detect its own wearing state and automatically configuring the appropriate microphone settings. This eliminates the need for manual user intervention or complex external control systems, as the device serves itself by monitoring its state and adapting its audio parameters accordingly.
2Reliability
If the portable audio device switches between microphone mode and voice reception mode, then the voice data reception is improved, but the control system becomes more complex
Solution Approach 1:
The system employs a closed-loop feedback mechanism where sensors continuously monitor the wearing state and provide real-time information to the processor. Based on this feedback, the processor automatically switches between microphone mode and voice reception mode, creating an adaptive control system that responds dynamically to changing usage conditions without requiring complex manual intervention.
3Measurement precision
If the sensor continuously monitors the wearing state, then the accuracy of detecting non-wearing state is improved, but the energy consumption increases
Solution Approach 1:
Instead of continuous monitoring, the sensor system operates periodically or event-driven, checking the wearing state at specific intervals or only when changes are detected. This approach maintains adequate detection accuracy for mode switching purposes while significantly reducing the average power consumption compared to continuous high-frequency sampling of sensor data.
Data Source
AI summary
A portable audio device including a first earphone unit and a second earphone unit according to an embodiment of the present disclosure, wherein the first earphone unit comprises:a communication unit an audio output unit configured to output an audio signal received through the communication unit; a microphone; a sensor unit configured to detect a wearing state of the first earphone unit; and a processor configured to set the first earphone unit to a microphone mode when the first earphone unit is detected as a non-wearing state.