Hearing Aid Filament Positioning for Ear Canal Placement
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Solution Overview
Problem
Current hearing aids face challenges in achieving consistent and accurate placement relative to the user's ear anatomy, particularly for non-custom models, which affects sound quality and comfort, due to anatomical variations among individuals.
Innovation Solution
A hearing aid system featuring flexible, shape-retaining filaments attached to the shell that interact with the ear anatomy, providing a stop for insertion depth and biasing structure to secure the hearing aid in the ear canal, supporting its weight and maintaining an open position, while being adaptable to different ear geometries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If non-custom hearing aids are used, then manufacturing cost is reduced, but placement consistency and accuracy deteriorate
Solution Approach 1:
The patent changes the physical parameters of the filaments (flexibility, shape-retaining properties, length) to create a universal positioning mechanism that adapts to different ear anatomies without requiring custom manufacturing. The filaments can be bent to different shapes and lengths while maintaining their memory, allowing a single hearing aid design to fit multiple users.
Solution Approach 2:
The flexible filaments act as an intermediary element between the hearing aid shell and the user's ear anatomy. They provide the adaptive connection that allows a standardized hearing aid to achieve custom-like fit and placement consistency across different users without requiring custom shells.
2Manufacturing precision
If the hearing aid is pushed deep into the ear canal for better sound quality, then sound quality improves, but comfort and ease of removal deteriorate
Solution Approach 1:
The filaments are pre-configured with bends and shapes that anticipate the insertion process. The pre-formed bends in the filaments guide the hearing aid to the correct depth automatically during insertion, eliminating the need for the user to push it deep manually while ensuring proper placement for sound quality.
Solution Approach 2:
The filaments serve as a mediator that decouples the insertion depth control from user effort. They mechanically guide the hearing aid to the optimal position through their pre-formed geometry, providing both accurate placement and user comfort without requiring deep manual insertion.
3Manufacturing precision
If custom shells are used, then placement accuracy improves, but manufacturing cost and complexity increase
Solution Approach 1:
Instead of changing the shell geometry for each user, the patent changes the filament parameters (bend shape, length, flexibility) to achieve placement accuracy. This maintains a standardized shell design while using adjustable filament parameters to accommodate different ear anatomies, reducing manufacturing complexity.
Solution Approach 2:
The patent separates the placement function from the shell structure by using independent filaments. This segmentation allows the shell to remain standardized while the filaments provide the adaptive positioning function, eliminating the need for custom shell manufacturing while maintaining placement accuracy.
4Ease of operation
If the hearing aid relies on snugness in the ear canal for placement, then placement is achieved, but reliability for users with varying ear canal diameters deteriorates
Solution Approach 1:
The filaments are pre-formed with specific bends and shapes that anticipate and compensate for variations in ear canal anatomy. This preliminary configuration ensures reliable placement regardless of the user's ear canal diameter, as the filaments guide the hearing aid to the correct position through their pre-determined geometry rather than relying on friction from snugness.
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
The system ensures proper placement and comfort by minimizing contact with the ear canal walls, maintaining an unoccluded sound pathway, and providing a secure fit without customization, thus enhancing sound quality and aesthetics.
Implementation Method 1
One or more flexible, shape-retaining filaments are attached to the hearing aid shell
Implementation Method 2
a biasing structure to bias the hearing aid into the ear canal and bias the stop against the user's ear skin
Data Source
AI summary
A hearing aid includes a relatively rigid shell which holds hearing aid electronics and one or more flexible, shape-retaining filaments attached to the hearing aid shell. The filament(s) extend(s) out a proximal side of the hearing aid shell having a shape which interacts with the user's ear anatomy such as the conchae bowl. The shape determines an insertion depth of the hearing aid shell into the user's ear canal, and a spring action biases the hearing aid toward the desired insertion depth. The hearing aid supported by the filament(s) provides an open, unoccluding position in the ear canal.