Hearing Aid Rear Ventilation via Segmented Connecting Channel
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Solution Overview
Problem
Hearing aid devices with receivers in earmolds lack effective rear ventilation for barometric pressure equalization, leading to potential blockages from dirt accumulation and contamination, especially when using air-impermeable membranes and tight-fitting receivers.
Innovation Solution
A hearing aid device design featuring a connecting channel between the earmold and the device element's housing for rear ventilation, ensuring air and water-tightness of the earmold while protecting pressure equalization openings from moisture and contamination through a continuous ventilation channel and air-permeable covers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the earmold is made air and water-tight to protect against contamination, then protection against moisture and dirt is improved, but barometric pressure equalization is hindered
Solution Approach 1:
The ventilation system is segmented into multiple functional parts: the first ventilation channel in the device element housing, the second ventilation channel in the connecting piece, and the third ventilation channel in the earmold. This segmentation allows each component to contribute to both protection and pressure equalization functions independently, resolving the contradiction between sealing and ventilation requirements.
Solution Approach 2:
The connecting piece acts as an intermediary component that houses the second ventilation channel, serving as a bridge between the device element and earmold. This intermediary structure enables the transmission of ventilated air from the device element through the connecting piece to the earmold, allowing pressure equalization while maintaining the air and water-tight seal of the earmold.
2Illumination intensity
If ventilation openings are made small to avoid acoustic feedback, then acoustic performance is improved, but susceptibility to blockage from dirt increases
Solution Approach 1:
Multiple ventilation channels are merged into a single integrated ventilation system that spans across the device element, connecting piece, and earmold. This merging creates a continuous air flow path that maintains small opening sizes for acoustic performance while the distributed structure reduces the likelihood of complete blockage by dirt accumulation.
Solution Approach 2:
The ventilation system is extended from a single-point opening to a multi-dimensional channel network distributed across different components. By adding the spatial dimension of multiple channels through the device element and connecting piece, the system maintains small individual openings for acoustic performance while the collective multi-channel structure provides redundancy against blockage.
3Power
If the receiver is tightly fitted in the earmold to improve acoustic performance, then acoustic efficiency is improved, but rear ventilation for pressure equalization becomes difficult
Solution Approach 1:
The ventilation function is extracted from the immediate receiver housing area and relocated to separate ventilation channels positioned in the device element, connecting piece, and earmold. This extraction allows the receiver to maintain tight fitting for acoustic efficiency while the separated ventilation channels provide the necessary rear ventilation path for pressure equalization without interfering with the acoustic seal.
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 prevents blockages by maintaining air and water-tightness of the earmold and receiver, ensuring proper barometric pressure equalization and protecting against contamination, thus enhancing the reliability and longevity of the hearing aid device.
Implementation Method 1
an air vent is required for the enclosed volume between the receiver and the membrane for barometric pressure equalization purposes
Data Source
AI summary
With a hearing aid device having a device element which can be worn on or behind the ear and an earmold which protrudes at least partially into the auditory canal of a user, in which earmold a receiver is arranged, the protection of the receiver from contamination is to be improved. To this end, a sound outlet opening in the earmold is covered with a membrane and a ventilation channel is provided for the rear ventilation of the membrane, with at least one segment of the ventilation channel running in a connecting piece, which connects the device element to the earmold.