In-Ear Hearing Aid Vent for Pressure Equalization
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Solution Overview
Problem
In-the-ear hearing aid devices face contamination and acoustic impairment due to ear wax ingress, with existing cerumen protection systems being difficult to clean, space-consuming, or requiring modified earpieces for barometric pressure equalization.
Innovation Solution
A hearing aid device design featuring a non-porous cerumen protection system with a thin, air-permeable membrane and a pressure equalization canal that connects the sound canal to the vent, allowing for conventional earpieces and maintaining acoustic performance without additional housing space, while enabling easy replacement of the cerumen protection system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a non-porous membrane is used for cerumen protection, then ear wax ingress is prevented, but barometric pressure equalization is compromised
Solution Approach 1:
The patent divides the sound canal into two functional zones: a gas-tight sealed section containing the earpiece and membrane, and a vented section containing the aperture. This segmentation allows the membrane to prevent cerumen ingress while the vent aperture enables barometric pressure equalization, resolving the contradiction between protection and pressure balance.
Solution Approach 2:
The vent aperture acts as an intermediary element that mediates between the gas-tight membrane and the external environment. It allows pressure equalization without compromising the membrane's cerumen protection function, as the aperture is positioned and sized to permit air passage while maintaining the protective seal.
2Object-affected harmful factors
If cover-type cerumen protection systems are used, then cerumen ingress is prevented, but additional housing space is required
Solution Approach 1:
The patent employs a thin, flexible non-porous membrane as the cerumen protection system. This membrane can be integrated into the existing housing structure without requiring additional space, unlike rigid cover-type systems. The membrane's thin profile allows it to be positioned within the sound canal without increasing overall device volume.
3Object-affected harmful factors
If insertable cerumen protection systems are used, then cerumen ingress is prevented, but the acoustically active cross-section of the sound canal is reduced
Solution Approach 1:
The patent applies local quality by positioning the membrane specifically at the sound canal aperture where cerumen ingress occurs, rather than inserting protection elements throughout the sound canal. This localized approach maintains the acoustically active cross-section of the sound canal while providing effective cerumen protection at the critical entry point.
4Reliability
If a thickening with flange or barb is used to secure the cerumen protection system, then reliable connection is achieved, but device complexity increases
Solution Approach 1:
The patent merges the membrane mounting structure with the housing itself, integrating the support and sealing functions into the existing housing geometry. This eliminates the need for separate flanges, barbs, or studs, reducing structural complexity while maintaining reliable connection and sealing of the membrane to the housing.
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 solution ensures effective barometric pressure equalization without reducing the sound canal's cross-section, prevents ear wax contamination, and allows for cost-effective production using computer-aided manufacturing, maintaining acoustic quality and ease of maintenance.
Implementation Method 1
a cerumen protection system with a non-porous membrane disposed in the first housing area
Implementation Method 2
a vent with a first aperture located in the first housing area and a second aperture located in the second housing area... brings about barometric pressure equalization for said volume
Implementation Method 3
A hearing aid device design featuring a non-porous cerumen protection system with a thin, air-permeable membrane
Implementation Method 4
a pressure equalization canal that connects the sound canal to the vent, allowing for conventional earpieces and maintaining acoustic performance
Data Source
AI summary
With a hearing aid device barometric pressure equalization is intended to be achieved in a simple and economical manner in a sound canal between an earpiece and a cerumen protection system with a gas-tight membrane. To this end a pressure equalization canal is proposed, which opens into the sound canal. The pressure equalization canal preferably connects the sound canal to a vent. It can be produced in a simple manner when manufacturing the housing of the hearing aid device using a computer-aided manufacturing method.