Pressure-Regulating Earplug With Bidirectional Valve
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Solution Overview
Problem
Conventional earplugs offer fixed sound attenuation and cannot be worn during activities like diving or flying due to pressure changes, and vented earplugs provide less attenuation and are prone to clogging.
Innovation Solution
A pressure-regulating earplug with a passive, two-way valve that opens in response to pressure differentials to equilibrate pressure between the external atmosphere and the ear canal, allowing for safe pressure equalization without compromising noise attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional solid earplugs are used to provide fixed sound attenuation, then noise protection is improved, but the earplug cannot be worn during activities with pressure changes such as diving or flying
Solution Approach 1:
The earplug incorporates a dynamic pressure equalization valve that transitions between closed and open states based on pressure differentials. The valve remains closed during normal conditions to maintain noise attenuation, and automatically opens when pressure changes occur to equalize pressure between the ear canal and external environment, enabling use during diving and flying activities.
Solution Approach 2:
The valve mechanism changes its opening pressure threshold parameter to adapt to different operating conditions. The valve is designed to open at specific pressure differentials (e.g., 0.1-1.5 psi) to allow pressure equalization while maintaining noise attenuation during normal conditions. This parameter-based control enables the earplug to switch between noise protection mode and pressure equalization mode as needed.
2Adaptability or versatility
If vented earplugs are used to allow pressure equalization, then pressure changes can be accommodated, but sound attenuation is significantly reduced and the earplug is prone to clogging
Solution Approach 1:
The patent extracts the pressure equalization function from the earplug body by incorporating a separate valve mechanism that is only activated when needed. This allows the earplug to maintain its solid, noise-attenuating structure during normal conditions while providing pressure equalization capability through the valve's selective opening, thus avoiding the continuous venting that reduces noise protection.
Solution Approach 2:
The pressure equalization valve acts as an intermediary mechanism between the sealed earplug body and the external environment. It mediates pressure equalization by opening only when pressure differentials exceed a threshold, allowing controlled air exchange without compromising the overall sealing and noise attenuation performance of the earplug.
3Adaptability or versatility
If vented earplugs are used to equalize pressure, then pressure changes can be managed, but the earplug is prone to clogging
Solution Approach 1:
The valve mechanism is extracted as a separate, removable component from the earplug body, allowing it to be cleaned and maintained independently. This separation reduces clogging by enabling regular cleaning of the valve aperture and internal passages, and allows replacement of the valve component if it becomes obstructed, thereby improving reliability during extended use during diving or flying.
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 pressure-regulating earplug maintains effective noise attenuation equivalent to solid earplugs while allowing safe pressure equalization during activities with significant pressure changes, reducing the risk of clogging and improving communication fidelity.
Implementation Method 1
a pressure regulator affixed to the earplug body and adapted for selectively opening in response to increase pressure differential to allow release of pressure in either direction to equilibrate pressure between the external atmosphere and the ear canal
Implementation Method 2
the pressure regulator is a passive, two-way valve
Data Source
AI summary
A pressure-regulating earplug including an earplug body having an external surface adapted for sealingly engaging an ear canal, the earplug body including a conduit configured to provide fluid communication with an external atmosphere and the ear canal; and a sound blocking bidirectional pressure regulator in-line with the conduit, configured to be normally closed, preventing fluid communication between the external atmosphere and the ear canal, and selectively open, the sound blocking bidirectional pressure regulator including a valve assembly configured to automatically open at a first pressure differential and a second pressure differential, wherein the first pressure differential and the second pressure differential are substantially similar in magnitude and opposite in direction enabling bidirectional pressure equalization, wherein the valve assembly acoustically seals when closed to minimize sound transmission.