Compressible Foam Earpiece with Filter Stem for Sound Attenuation
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Solution Overview
Problem
Current earplug designs fail to effectively retain sound attenuation in the ear canal, leading to discomfort and inadequate sound blocking in various noisy environments.
Innovation Solution
A sound attenuation system comprising a foam earpiece with a compressible shaft and a filter stem, where the shaft conforms to the ear canal's shape and the filter stem provides a secure fit using a press fit mechanism, allowing for easy insertion and removal while maintaining sound blockage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a foam earpiece is used for sound attenuation, then sound blocking capability is improved, but retention and stability in the ear canal deteriorates
Solution Approach 1:
The earpiece system is divided into separate components: a reusable earphone unit and replaceable foam earpieces. This segmentation allows the foam earpiece to be optimized for sound blocking while the earphone unit provides the retention mechanism through its housing and attachment design, resolving the contradiction between sound blocking capability and retention stability.
2Ease of operation
If the foam earpiece is compressed for insertion, then ease of insertion is improved, but structural integrity and sound blocking deteriorates
Solution Approach 1:
The foam earpiece is pre-compressed within a compact housing or packaging before use. This preliminary compression allows the earpiece to be easily inserted into the ear canal, while the foam's elastic recovery properties enable it to expand to its full sound-blocking dimensions once inserted, resolving the contradiction between ease of insertion and sound blocking capability.
3Ease of operation
If the earpiece is made flexible for comfort, then ease of operation is improved, but retention and secure fit deteriorates
Solution Approach 1:
The earpiece design incorporates different material properties in different regions: the portion contacting the ear canal is made soft and flexible for comfort, while the attachment interface with the earphone unit is made more rigid for secure retention. This local differentiation of material qualities resolves the contradiction between comfort and retention.
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 system ensures comfortable and effective sound attenuation by conforming to the ear canal's shape, reducing pressure and maintaining sound blockage over extended periods without requiring constant adjustment.
Implementation Method 1
a sizer configured to receive the foam portion in order to compress the foam portion such that the foam portion is configured to fit inside an ear of a user
Implementation Method 2
the shaft conforms to the ear canal's shape and the filter stem provides a secure fit
Data Source
AI summary
A sound attenuation system can include a first end that can include a shaft and a flange, the flange can be coupled to the shaft, and a second end that can include a filter stem and a cap. The filter stem can have a hole. The cap can have a first position in which the cap occludes the hole and can have a second position in which the cap is clear of the hole.