Expandable Ear Canal Seal for Occlusion Effect Mitigation
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Solution Overview
Problem
The occlusion effect, which is the amplification of self-generated sounds due to ear canal occlusion, poses a significant obstacle to effective hearing aid use and shallowly inserted earpieces, as existing solutions like acoustic vents have limitations such as ringing and incomplete sound isolation.
Innovation Solution
An occlusion effect mitigation device comprising an insertion element with an expandable element that expands against the walls of a flexible channel, forming a sealed chamber and varying sound isolation by adjusting the pressure of an expanding medium, such as air or liquid, to reduce the occlusion effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the ear canal is occluded to improve sound isolation, then sound isolation is improved, but the occlusion effect increases causing amplification of self-generated sounds
Solution Approach 1:
The patent employs an expandable element that can dynamically adjust its volume and sealing pressure against the ear canal walls. This dynamic adjustment allows the system to optimize sound isolation while minimizing the occlusion effect by controlling the degree of ear canal occlusion, thereby resolving the contradiction between improved sound isolation and reduced occlusion effect.
Solution Approach 2:
The patent changes the physical parameters of the sealing system by using an expandable element that can vary its internal volume and pressure. By adjusting these parameters, the system achieves optimal sound isolation without excessive occlusion, as the expandable element can adapt its sealing force and contact pressure to minimize resonance amplification while maintaining effective sound isolation.
2Object-generated harmful factors
If acoustic vents are used to reduce the occlusion effect, then the occlusion effect is reduced, but ringing occurs and sound isolation is compromised
Solution Approach 1:
The patent extracts the venting function from the traditional acoustic vent design by using an expandable element that can create controlled acoustic pathways. Instead of fixed vents that cause ringing, the expandable element dynamically creates openings that reduce the occlusion effect without compromising sound isolation, as the openings can be precisely controlled in size and position.
Solution Approach 2:
The expandable element provides dynamic control over acoustic ventilation, allowing the system to open and close acoustic pathways as needed. This dynamic venting mechanism reduces the occlusion effect when necessary while maintaining sound isolation, eliminating the ringing problem associated with fixed acoustic vents.
3Object-generated harmful factors
If deep insertion with bony contact is used to reduce the occlusion effect, then the occlusion effect is reduced, but device complexity and insertion difficulty increase
Solution Approach 1:
The expandable element performs the sealing function automatically upon insertion, eliminating the need for deep insertion into the bony section of the ear canal. The element self-adjusts to the ear canal geometry and expands to create the seal, reducing the occlusion effect without requiring complex deep insertion procedures or specialized ear canal anatomy.
Solution Approach 2:
The patent applies local quality by using an expandable element that adapts to the specific geometry of the ear canal at the insertion point. This localized adaptation allows the device to achieve effective sealing and reduce the occlusion effect without requiring deep insertion, as the expandable element conforms to the local ear canal structure.
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 device effectively reduces the occlusion effect by increasing sound isolation across the sealed chamber, improving sound transmission and reducing resonance amplification, thereby enhancing the performance of earpieces and hearing aids.
Implementation Method 1
the pressure of the expanding medium is varied to vary sound isolation across the expandable element
Implementation Method 2
vary sound isolation across the expandable element by adjusting the pressure of an expanding medium
Data Source
AI summary
Methods and devices for sound isolation are provided. A sound isolation device includes an expandable element and an insertion element. The expandable element is operatively attached to the insertion element. The expandable element includes an expanding medium, where the pressure of the expanding medium is varied to vary a sound isolation across the expandable element.