Earpiece with In-Ear EEG Electrodes for Impedance-Based Signal Acquisition
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Solution Overview
Problem
Current methods for obtaining EEG signals are cumbersome, require trained personnel, and suffer from signal attenuation and high impedance issues when using traditional electrode placement on the head, making them unsuitable for portable and comfortable monitoring during physical activity.
Innovation Solution
A wireless earpiece system with multiple EEG electrodes positioned on the ear surface, a processor to measure impedance, and a method to transmit activation signals only to electrodes with suitable impedance, allowing for reliable EEG signal acquisition without the need for trained personnel and reducing signal attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrodes are placed on the head to obtain EEG signals, then EEG data can be collected, but the device becomes bulky, rigid, and uncomfortable for physical activity
Solution Approach 1:
The system automatically performs impedance measurement and electrode selection without requiring trained personnel. The processor measures impedance of multiple electrodes and autonomously determines which electrodes have suitable contact quality, eliminating the need for manual assessment by medical professionals.
Solution Approach 2:
The patent replaces traditional manual electrode placement methods with an automated electronic system. Instead of relying on mechanical placement by trained personnel, the system uses electronic impedance measurement to automatically identify and select suitable electrodes for signal acquisition.
2Reliability
If traditional electrode placement methods are used on the head, then EEG signals can be obtained, but signal attenuation occurs due to the skull
Solution Approach 1:
The patent extracts the electrodes from traditional head placement and relocates them to the ear. By taking the electrodes out of the conventional position on the scalp and placing them on the ear surface, the system eliminates the signal attenuation problem caused by the skull while maintaining EEG signal acquisition capability.
3Ease of operation
If multiple EEG electrodes are placed close together in the ear canal, then portability is improved, but spatial resolution decreases and impedance increases
Solution Approach 1:
The system divides the electrode array into multiple segments and measures impedance for each individual electrode. By segmenting the electrode group and evaluating each one's impedance separately, the system can identify and select the best-performing electrodes, maintaining measurement precision even when electrodes are placed close together for portability.
Solution Approach 2:
The patent changes the selection criterion from fixed spatial positioning to dynamic impedance-based selection. Instead of relying on predetermined spatial resolution, the system adjusts electrode selection based on measured impedance parameters, allowing optimal signal quality regardless of the physical distance between electrodes.
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
Enables portable, comfortable, and accurate EEG signal monitoring by determining ideal electrode locations and impedance thresholds, improving signal quality and reducing the need for trained professionals.
Implementation Method 1
the processor measures the impedance of the plurality of EEG electrodes
Implementation Method 2
at least two EEG electrodes operatively connected to the processor and positioned on the housing for receiving EEG signals from an ear surface
Data Source
AI summary
In some embodiments, an electronic device for monitoring EEG data, may include one or more of the following features: (a) a housing, (b) a processor disposed within the housing, (c) at least one sensor operatively connected to the processor, (d) at least two EEG electrodes operatively connected to the processor and positioned on the housing for receiving EEG signals from an ear surface, and (e) a plurality of EEG electrodes, wherein the processor measures the impedance of the plurality of EEG electrodes.