Earpiece Sizing via Smartphone Image Analysis

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Solution Overview

Problem

Conventional earbuds often fail to fit comfortably due to their one-size-fits-all design, leading to inadequate ambient noise isolation and discomfort, with existing solutions like adapter kits or custom earbuds being either ineffective or costly and inconvenient.

Innovation Solution

A method and system that uses an iPhone's camera to capture and analyze an image of the user's ear, determining the size of an earpiece through self-portrait image capture, allowing for personalized fitting without the need for external assistance or costly molding processes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If one-size-fits-all earpieces are used, then manufacturing cost is low and production is simple, but fit quality and user comfort deteriorate

Engineering Contradiction:
Improvemanufacturing simplicityVSAvoidfit quality
Core Design Contradiction:
Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent applies parameter changes by offering multiple earpiece adapters with different physical parameters (sizes, shapes, materials) to match varying user ear anatomies. The system changes the geometric parameters of the adapters to achieve better fit quality while maintaining mass production capabilities, thus resolving the contradiction between manufacturing simplicity and fit quality.

Inventive Principle:
Principle #35Parameter changes

2Manufacturing precision

If adapter kits with multiple sizes are provided, then fit quality improves slightly, but device complexity and user time requirement increase

Engineering Contradiction:
Improvefit qualityVSAvoidkit complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent applies self-service by enabling users to independently determine their earpiece size using simple measurement tools and guidelines provided in the kit. Users can measure their own ear canals and match measurements to the provided size chart, eliminating the need for complex fitting procedures or professional assistance. This reduces device complexity while maintaining improved fit quality.

Inventive Principle:
Principle #25Self-service

3Manufacturing precision

If full custom earbuds are manufactured through molding, then fit quality and comfort improve significantly, but production cost and time requirement increase

Engineering Contradiction:
Improvecustom fit qualityVSAvoidproduction cost
Core Design Contradiction:
Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent applies copying by creating simplified replica versions of custom-fit earpieces using standardized manufacturing processes. Instead of performing complex molding for each user, the system uses digital imaging to capture ear geometry, processes this data to determine optimal dimensions, and selects from pre-manufactured adapters that replicate the essential geometric features. This achieves good fit quality without the high costs and time requirements of full custom molding.

Inventive Principle:
Principle #26Copying

4Adaptability or versatility

If flexible compliant earbud adapters are used, then adaptability to different ear shapes improves, but manufacturing precision for optimal fit deteriorates

Engineering Contradiction:
Improveanatomy accommodationVSAvoidfit precision
Core Design Contradiction:
Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent applies preliminary action by pre-determining the optimal earpiece size for each user before they receive the product. Users complete a simple ear measurement and visualization process online, which pre-calculates the best-fitting adapter size. This preliminary sizing action ensures manufacturing precision is maintained while the flexible adapter material provides adaptability to the user's specific ear anatomy upon receipt.

Inventive Principle:
Principle #10Preliminary action

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 convenient, cost-effective, and personalized fitting of earpieces by leveraging the iPhone's camera and internet connectivity for immediate sizing and ordering, reducing material waste and production costs while improving user comfort and convenience.

Implementation Method 1

The user then touches and holds a random area of the touch screen display and releases the touch screen display to activate the image capture device and capture an image of the user's ear and the calibration device

Methodology Applied
Scientific EffectPhotography: Photography

Implementation Method 2

The captured image is then analyzed and an earpiece size is determined based on the analysis of the image

Methodology Applied
Scientific EffectImage Processing: Image Processing

Data Source

PatentUS10123109B2Image capture and earpiece sizing system and method
Publication Date: 2018.11.06 HARMAN INT IND INC
  • US10123109B2 patent drawing
  • US10123109B2 patent drawing
  • US10123109B2 patent drawing

AI summary

A method and system for sizing an earpiece include situating a calibration device proximate a user's ear. The user holds an image capture device so as to aim the image capture device at the user's ear. The user then touches and holds a random area of the touch screen display and releases the touch screen display to activate the image capture device and capture an image of the user's ear and the calibration device. The captured image is then analyzed and an earpiece size is determined based on the analysis of the image.