Hearing Device Vent With Segmented Protrusions
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Solution Overview
Problem
Existing hearing devices face a challenge in reducing occlusion while maintaining stability and comfort, as traditional vent designs either compromise stability or increase occlusion, and methods to enhance vent size or fitting looseness lead to instability or bulkiness.
Innovation Solution
The earpiece design features an earpiece housing with a first and second protrusion and an intermediate cavity, providing fluid communication between the ear canal cavity and surroundings, which reduces occlusion without compromising stability by minimizing the surface area in contact with the ear canal wall, achieved through a customized model-based manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the vent is made shorter or the fitting is loosened to reduce occlusion, then occlusion is reduced, but the stability of the hearing device in the ear canal is reduced
Solution Approach 1:
The vent is segmented into two separate protrusions (first and second protrusions) with an intermediate cavity between them, creating a stepped configuration. This segmentation allows the vent to provide pressure equalization while the protrusions maintain contact with the ear canal wall for stability.
Solution Approach 2:
The vent design transitions from a simple linear channel to a three-dimensional structure with protrusions extending into the ear canal. This dimensional change allows the vent to simultaneously provide occlusion reduction and mechanical stability through strategic placement of contact surfaces.
2Stability of the object's composition
If the contact area between the hearing device and ear canal wall is increased to increase stability, then stability is improved, but occlusion increases and the user may feel the device is bulky
Solution Approach 1:
The protrusions are strategically positioned to provide localized contact with the ear canal wall at specific points, rather than increasing the overall contact area. This localized contact maintains stability while minimizing the total surface area in contact with the ear canal, thereby reducing occlusion.
Solution Approach 2:
The contact interface is segmented into discrete protrusions rather than a continuous contact surface. This segmentation allows stability to be achieved through strategic point contacts while maintaining large gaps between contact points that facilitate pressure equalization and reduce occlusion.
3Object-affected harmful factors
If a vent is provided in the earpiece to allow pressure equalization, then occlusion is reduced, but the stability and comfort are compromised
Solution Approach 1:
The vent is divided into multiple protrusions with an intermediate cavity, creating a stepped structure that provides pressure equalization pathways while the protrusions themselves serve as stabilizing contact points with the ear canal wall, thereby maintaining comfort.
Solution Approach 2:
The intermediate cavity acts as an intermediary chamber between the two protrusions, allowing pressure equalization to occur through a controlled pathway that does not directly compromise the stabilizing contact of the protrusions with the ear canal.
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
This design effectively reduces occlusion while maintaining a stable and comfortable fit, providing improved wear comfort and audio feedback reduction for hearing device users.
Implementation Method 1
the first protrusion comprising a first channel part providing fluid communication between the ear canal cavity and the intermediate cavity
Implementation Method 2
the second protrusion comprising a second channel part providing fluid communication between the intermediate cavity and surroundings of the user
Data Source
AI summary
An earpiece housing includes: an ear canal part to be introduced into an ear canal of a user, wherein the ear canal part extends along an ear canal axis of the earpiece, the ear canal part having a first end configured to be positioned in the ear canal of the user; a first protrusion with a first outer surface; and a second protrusion with a second outer surface; and an intermediate space between the first protrusion and the second protrusion; wherein the first protrusion is between the first end of the ear canal part and the second protrusion along the ear canal axis, the first protrusion comprising a first channel part configured to provide fluid communication between an ear canal cavity and the intermediate space, the second protrusion comprising a second channel part configured to provide fluid communication between the intermediate space and a surrounding of the user.