Ear-worn Device Reaction Time Measurement
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Solution Overview
Problem
Current methods lack practical solutions for widely measuring reaction time outside of research settings due to associated challenges, and there is a need for accurate and frequent monitoring of reaction and reflex speeds to assess cognitive status and fall risk.
Innovation Solution
Ear-worn devices equipped with control circuits, clock circuits, motion sensors, and electroacoustic transducers are configured to initiate stimuli and measure response times, allowing for longitudinal trend analysis and alert issuance based on threshold values, thereby determining fall risk and optimizing hearing device settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If reaction time measurement is performed outside research settings, then accessibility and frequency of measurement improve, but measurement accuracy and reliability deteriorate
Solution Approach 1:
The ear-worn device automatically initiates stimuli, detects responses, and measures reaction times without requiring external research equipment or personnel. The device uses its own electroacoustic transducer to generate stimuli and its own sensors to detect responses, enabling self-contained measurement in real-world settings.
Solution Approach 2:
The ear-worn device serves multiple functions: it provides hearing assistance while simultaneously measuring reaction times. The same hardware components (electroacoustic transducer, microphones, motion sensors) used for hearing aid functions are repurposed for cognitive assessment, eliminating the need for separate measurement equipment.
2Measurement precision
If multiple sensors and circuits are integrated into ear-worn device, then measurement capability improves, but device complexity increases
Solution Approach 1:
Existing hearing aid components serve dual purposes: the electroacoustic transducer generates both hearing assistance signals and measurement stimuli; microphones and motion sensors detect both environmental sounds and user responses. This eliminates the need for separate measurement-specific hardware.
Solution Approach 2:
The measurement system is merged with the hearing aid processing pipeline. Stimulus generation, response detection, and reaction time calculation are integrated into the existing audio signal processing flow, allowing measurement functions to share computational resources with hearing assistance functions.
3Reliability
If longitudinal monitoring is implemented, then cognitive status assessment improves, but data processing requirements increase
Solution Approach 1:
The device continuously collects and stores reaction time data in the background without requiring real-time analysis. Longitudinal trends are evaluated by comparing accumulated data over time, allowing cognitive status assessment to emerge from historical data patterns rather than requiring complex real-time processing.
Solution Approach 2:
The system provides feedback by comparing current reaction times against historical baselines and issuing alerts when thresholds are exceeded. This feedback mechanism enables continuous cognitive monitoring while keeping data processing requirements manageable through threshold-based decision making.
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 ear-worn devices provide accurate and frequent measurements of reaction and reflex times, enabling effective assessment of cognitive status and fall risk, as well as individualized signal processing settings for improved hearing device performance.
Implementation Method 1
an electroacoustic transducer for generating sound in electrical communication with the control circuit
Implementation Method 2
a motion sensor in electrical communication with the control circuit
Data Source
AI summary
Embodiments herein relate to ear-worn devices and, more specifically, ear-worn devices that can measure reaction and/or reflex speeds. An ear-worn device herein can include a control circuit, a clock circuit in electrical communication with the control circuit, a motion sensor in electrical communication with the control circuit, an electroacoustic transducer for generating sound in electrical communication with the control circuit, and a power supply circuit in electrical communication with the control circuit. The ear-worn device can be configured to initiate generation of a stimulus sufficient to generate a response from the ear-worn device wearer. The ear-worn device can be configured to monitor for a qualified response to the stimulus and measure an amount of time between the stimulus and the qualified response. Other embodiments are also included herein.