Ear Canal Pressure Sensing for Earpiece Seal Quality
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Solution Overview
Problem
Earpiece manufacturers face challenges in designing earpieces that achieve a good seal for each user, as existing methods are subjective, uncomfortable, complex, and require mechanical means that increase device size and power consumption.
Innovation Solution
An apparatus that uses a pressure sensor to measure pressure within the ear canal during earpiece insertion, analyzing pressure signal characteristics to objectively determine the quality of the seal between the earpiece and the ear canal, facilitating a robust and unobtrusive assessment of seal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mechanical means such as inflating an ear tip are used to ensure a good seal, then seal quality is improved, but device complexity and user comfort deteriorate
Solution Approach 1:
The patent replaces mechanical seal verification methods (such as inflating ear tips) with an acoustic measurement system. A microphone detects acoustic signals within the ear canal to objectively determine seal quality, eliminating the need for complex mechanical components while maintaining measurement accuracy.
Solution Approach 2:
The system automatically determines seal quality by analyzing acoustic signals passively present in the ear canal during normal earpiece wear. No active user initiation or additional mechanical actions are required - the system self-evaluates the seal condition using the ear canal's natural acoustic environment.
2Measurement precision
If mechanical means such as inflating an ear tip are used to ensure a good seal, then seal quality is improved, but power consumption increases
Solution Approach 1:
The patent replaces power-intensive mechanical inflation mechanisms with a low-power acoustic sensing system. The microphone-based approach continuously monitors seal quality by detecting acoustic signals already present in the ear canal, consuming minimal energy compared to mechanical actuation systems.
Solution Approach 2:
The system passively evaluates seal quality using acoustic signals naturally present in the ear canal during wear, without requiring additional power-consuming mechanical actions or active user participation to generate test signals.
3Measurement precision
If mechanical means are used to ensure a good seal, then seal quality is improved, but device size increases
Solution Approach 1:
The patent replaces bulky mechanical components (inflation mechanisms, moving parts) with a compact acoustic sensing system. The microphone and signal processing circuitry occupy minimal space within the earpiece, enabling seal quality determination without increasing device volume.
4Measurement precision
If moving parts are used to ensure a good seal, then seal quality is improved, but reliability deteriorates
Solution Approach 1:
The patent eliminates moving parts by using a static acoustic measurement system. The microphone and signal processing components have no mechanical motion, removing the source of mechanical failure and significantly improving device reliability while maintaining accurate seal quality assessment.
5Ease of operation
If subjective user perception is used to assess seal quality, then ease of operation is maintained, but measurement precision deteriorates
Solution Approach 1:
The system automatically performs seal quality assessment without requiring user subjective evaluation. The microphone detects acoustic signals and the processor objectively determines seal quality, providing precise measurement while requiring no active user participation beyond normal earpiece wear.
Solution Approach 2:
The patent replaces subjective human perception with an objective acoustic measurement system. The microphone and signal processing algorithm quantify seal quality based on acoustic signal characteristics, eliminating variability in user perception while maintaining ease of use.
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 a simple, repeatable, and comfortable determination of seal quality without active user initiation, reducing computational resources and device complexity while ensuring effective acoustic performance and enabling features like noise cancellation and user authentication.
Implementation Method 1
receiving, over a period of time, a signal indicative of a pressure measured by a pressure sensor of an earpiece
Data Source
Figure 1
Figure 2A~2B
Figure 3A
AI summary
An apparatus, method and computer program is described for: receiving, over a period of time, a signal indicative of a pressure measured by a pressure sensor of an earpiece, the earpiece comprising an ear tip configured for insertion into an ear canal of a user, wherein the pressure sensor is arranged to measure a pressure within the ear canal whilst the ear tip is inserted into the ear canal; determining one or more characteristics of the signal; and determining a measure of a quality of a seal between the earpiece and the ear canal based on the one or more characteristics.