Optical Ear Scanning for Custom In-Ear Device Fit
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Solution Overview
Problem
Existing in-ear devices, such as earbuds and headphones, often become uncomfortable with extended wear due to lack of customization, leading to irritation and dislodgment, and current custom fitting methods are invasive, time-consuming, and risky.
Innovation Solution
A system using a personal electronic device with 3D scanning capabilities, incorporating structured light or RGB-IR dot projection mapping, to capture high-resolution images of the ear, generating a precise 3D model for producing bespoke-fitting in-ear devices, reducing the need for invasive molding processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If mass-produced in-ear devices are used, then device availability and cost are improved, but comfort and fit are worsened due to lack of customization
Solution Approach 1:
The system performs preliminary scanning of the user's ear anatomy before device fabrication. The optical scanner captures 3D geometric data of the ear canal and pinna, which is then used to customize the in-ear device geometry to match the user's unique anatomy, ensuring optimal comfort and fit from the first use.
Solution Approach 2:
The invention changes the geometric parameters of the in-ear device based on scanned anatomical data. The system adjusts key geometric parameters such as ear canal angle, concha depth, and device curvature to match the individual user's ear structure, transforming standardized mass-produced devices into customized fittings.
2Manufacturing precision
If custom fitting is achieved through foam injection molding, then manufacturing precision and fit are improved, but the process becomes invasive and time-consuming
Solution Approach 1:
The invention replaces the mechanical foam injection molding process with an optical scanning system. Instead of injecting foam into the ear to create a mold, the system uses optical sensors to non-invasively scan the ear's surface geometry and generate 3D models, eliminating the need for invasive procedures while achieving equivalent customization precision.
Solution Approach 2:
The system creates a digital copy (3D model) of the user's ear anatomy through optical scanning. This digital replica captures the geometric features of the ear canal, concha, and pinna, which can then be used to design and manufacture custom in-ear devices without requiring physical molds or invasive procedures.
3Measurement precision
If foam injection molding is used for custom fitting, then measurement precision is improved, but safety and user comfort are worsened due to potential injury risk
Solution Approach 1:
The invention substitutes the potentially harmful mechanical foam injection process with a safe optical scanning system. The optical scanner uses light to measure ear anatomy, completely eliminating risks associated with foam injection such as allergic reactions, ear canal trauma, or infection, while maintaining high measurement precision through advanced optical sensing.
4Measurement precision
If professional facility visits are required for custom fitting, then measurement accuracy is improved, but accessibility and convenience are worsened
Solution Approach 1:
The system enables users to perform their own ear scanning at home using the portable optical scanner. The device includes user-friendly interfaces and automated scanning protocols that guide users through the process without requiring professional assistance, making custom fitting accessible and convenient while maintaining measurement accuracy through built-in calibration and quality control features.
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 the creation of custom-fitting in-ear devices that enhance comfort and reduce irritation, while being non-invasive and efficient, utilizing existing personal electronic devices for ear scanning and 3D model generation.
Implementation Method 1
incorporating structured light or RGB-IR dot projection mapping, to capture high-resolution images of the ear
Implementation Method 2
incorporating structured light or RGB-IR dot projection mapping, to capture high-resolution images of the ear
Data Source
AI summary
A system to optically measure an ear includes a controller with logic that when executed by the controller causes the system to perform operations. Operations may include capturing the one or more images of the ear using the one or more image sensors, and generating image data from the one or more images. 3D keypoints of the ear are calculated from the image data, and a 3D model of the ear is generated using the 3D keypoints.