Toroidal Earplug with Fluid Suspension for Deep Insertion
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Solution Overview
Problem
Current hearing protection methods, such as earplugs and muffs, often fail to provide adequate noise attenuation and comfort, leading to non-compliance due to discomfort, interference with job duties, and poor acoustic sealing, which contributes to noise-induced hearing loss (NIHL) in occupational settings.
Innovation Solution
A toroidal sound attenuation device with a fluid-filled interior volume containing gas-filled spheres, designed to transition between extended and retracted states for deep ear canal insertion, providing improved acoustic attenuation and comfort by forming a low-pressure, large-area seal without the need for inflation mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If roll-down earplugs are inserted deeply into the ear canal, then sound attenuation is improved, but ease of operation deteriorates
Solution Approach 1:
The earplug incorporates a resilient body that can be compressed to a smaller size for easy insertion, then automatically expands to its original shape to form an effective acoustic seal deep in the ear canal. This dynamic transformation allows users to easily insert the device while still achieving deep insertion for optimal attenuation.
2Object-affected harmful factors
If hearing protection is designed for deep insertion, then sound attenuation is improved, but comfort deteriorates
Solution Approach 1:
The earplug uses a resilient, flexible body that can conform to the unique shape of the user's ear canal. This flexibility allows the device to form an effective acoustic seal for deep insertion while simultaneously adapting to the ear canal's geometry to minimize discomfort and the occlusion effect.
3Ease of operation
If hearing protection devices are made easier to don, then ease of operation is improved, but sound attenuation deteriorates
Solution Approach 1:
The earplug is designed as a single-use disposable device that is pre-formed and ready for immediate insertion without requiring complex manipulation or assembly. This segmentation approach simplifies the donning process while maintaining the acoustic sealing properties needed for effective sound attenuation.
4Ease of manufacture
If earplugs are made disposable, then ease of manufacture is improved, but reliability deteriorates
Solution Approach 1:
The earplug utilizes a resilient material with specific elastic properties that enable consistent performance across all disposable units. By carefully controlling the material parameters and formulation, the device achieves reliable acoustic sealing and comfort characteristics while remaining simple to manufacture at scale.
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 noise-induced hearing loss by providing enhanced sound attenuation and comfort, promoting compliance through easy and deep insertion, while avoiding the mechanical deficiencies of inflatable earplugs, such as rupture risk and discomfort.
Implementation Method 1
a fluid suspension comprising a plurality of gas-filled spheres dispersed in an interstitial fluid. The gas-filled spheres increase an acoustic attenuation of the fluid suspension relative to the interstitial fluid alone
Data Source
AI summary
Systems and methods for occluding a duct and attenuating sound may be provided. In some embodiments, a device for attenuating sound passing through a duct or orifice may include a body sized and shaped to be inserted, at least partially, into a duct or orifice. The body may have an interior volume that contains a fluid suspension. In some embodiments, the fluid suspension may include a plurality of gas-filled spheres dispersed in an interstitial fluid. The gas-filled spheres may increase an acoustic attenuation of the fluid suspension relative to the interstitial fluid alone.