Earpiece Operating State Detection via Inner and Outer Microphones
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Solution Overview
Problem
Personal acoustic devices face issues with user safety and ease of use due to cumbersome controls and inconveniently located control mechanisms, often leading to forgotten operations when positioning or removing the device from the ear.
Innovation Solution
An apparatus and method that analyze signals from inner and outer microphones to determine the operating state of an earpiece, allowing for automated control adjustments, such as altering power provision, noise reduction, and audio routing, based on the device's position relative to the user's ear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If controls are made smaller to minimize device size and weight, then device portability is improved, but control operability becomes cumbersome
Solution Approach 1:
The system automatically detects earpiece positioning state through microphone signal analysis and autonomously controls device functions (power provision, noise reduction, audio routing) without requiring manual user interaction with physical controls
Solution Approach 2:
Physical mechanical controls are replaced with an automated acoustic detection system using microphones to sense earpiece position and trigger appropriate device states through signal processing algorithms
2Ease of operation
If control interfaces are integrated onto the personal acoustic device to improve accessibility, then control convenience is improved, but device complexity increases
Solution Approach 1:
The existing microphone system, originally designed for audio processing, is repurposed to perform dual functions: audio signal processing and earpiece positioning detection, eliminating the need for separate control interface hardware
Solution Approach 2:
The device uses its own operational components (microphones already present for audio functions) to automatically determine positioning state and control device behavior, avoiding addition of separate control mechanisms
3Reliability
If automated position determination is implemented to improve safety and ease of use, then user safety is improved, but device complexity increases
Solution Approach 1:
The system continuously monitors acoustic signals from microphones, compares them against reference patterns, and automatically adjusts device operation based on detected earpiece positioning state, creating a closed-loop control system
Solution Approach 2:
Complex mechanical positioning sensors are replaced with acoustic signal analysis using existing microphones, leveraging sound wave propagation characteristics to infer physical positioning state
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
Enhances user safety and ease of use by automatically managing device functions based on its position, reducing the likelihood of forgotten operations and improving control convenience.
Implementation Method 1
analyzing signals output by at least an inner microphone disposed within a cavity of a casing of the earpiece and an outer microphone disposed on the personal acoustic device
Data Source
AI summary
Apparatus and method for determining an operating state of a personal acoustic device by receiving a signal from one or more movement sensors indicating movement detected by the one or more movement sensors, wherein the one or more movement sensors are disposed on portions of the personal acoustic device structured to be worn on a user's head to enable the one or more movement sensors to detect rotational movements of a user's head when the personal acoustic device is in position on the user's head such that a casing of the personal acoustic device is adjacent an ear of the user.