Earphone Wearing Status Detection via Acoustic Pressure Analysis
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Solution Overview
Problem
Earphones using feedback noise reduction technology experience varying noise reduction performance and sound quality based on their wearing status, necessitating a method to detect proper wearing to enhance noise reduction and sound quality.
Innovation Solution
A method and device that detect the wearing status of earphones by acquiring environment type, playing a preset audio signal, measuring feedforward and feedback sound pressures, and comparing these pressures to threshold ranges to determine proper wearing, with optional features for binaural earphones and user input for environment type determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If feedback noise reduction is used to improve noise reduction performance and sound quality, then the earphone performance varies with wearing status, but it becomes difficult to detect and maintain proper wearing status
Solution Approach 1:
The patent uses feedback microphones to capture sound pressure information from the ear canal and feedforward microphones to capture external noise, creating a closed-loop system that continuously monitors wearing status and adjusts noise reduction parameters accordingly
Solution Approach 2:
The patent replaces manual wearing status assessment with acoustic measurement systems, using microphones and sound pressure analysis to automatically detect whether the earphone is properly inserted into the ear canal
2Reliability
If the earphone is worn with good coupling, then noise reduction performance and sound quality are improved, but the detection system becomes more complex
Solution Approach 1:
The patent makes the microphones serve multiple functions: feedforward microphones capture both external noise for noise reduction and acoustic signals for wearing status detection, while feedback microphones capture both leakage noise and insertion status information
Solution Approach 2:
The earphone system performs self-diagnosis by using its own acoustic signals to detect wearing status, eliminating the need for separate detection devices or additional sensors
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
Improves the coupling between the earphone and human ear, enhancing noise reduction performance and sound quality by accurately detecting and adjusting the wearing status.
Implementation Method 1
they convert electrical signals into acoustic signals during their use
Implementation Method 2
acquiring a feedforward sound pressure and a feedback sound pressure of the earphone... the feedforward sound pressure is a sound pressure of a sound signal picked up by a feedforward microphone... and the feedback sound pressure is a sound pressure of a sound signal picked up by a feedback microphone
Data Source
AI summary
Disclosed are methods and devices for detecting wearing status of an earphone. An example method comprises: acquiring an environment type comprising a noise environment type and a non-noise environment type; when the earphone is in the non-noise environment type, the earphone plays a preset audio signal; acquiring a feedforward and a feedback sound pressure of the earphone to determine a difference therebetween; determining, according to a comparison result of the difference and a preset first threshold range corresponding to the environment type, whether the earphone is worn properly.