Visco-Elastic Foam Earpiece Stem for Comfortable Sound Attenuation
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Solution Overview
Problem
Existing earpiece systems do not provide adequate comfort and flexibility while maintaining effective sound-attenuation properties.
Innovation Solution
A pliable earpiece stem with a convex curved sound-attenuating distal flange and an attachment portion configured to receive a foam sound-attenuating element, along with a handle portion, designed to fit into the ear canal with improved comfort and flexibility, and a sound-conducting stem channel with an optional coverable sound filter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid earpiece stem is used to maintain structural integrity, then manufacturing precision and assembly stability are improved, but comfort and flexibility when fitting into the ear canal deteriorate
Solution Approach 1:
The earpiece is divided into a rigid stem portion and a separate foam element. The rigid stem maintains structural integrity for manufacturing and assembly, while the foam element provides flexibility and comfort when inserted into the ear canal. This segmentation allows each component to optimize its specific function without compromising the other.
Solution Approach 2:
The earpiece combines rigid materials (for the stem) with visco-elastic foam material (for the ear canal interface). This composite construction allows the device to maintain structural stability while providing the flexibility and comfort needed for ear canal insertion, resolving the contradiction between rigidity and comfort.
2Ease of operation
If foam is added to improve comfort and flexibility, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The foam element is designed as a separate component that attaches to the rigid stem, allowing the comfort function to be added without fundamentally redesigning the entire structure. This modular approach minimizes the increase in overall device complexity while achieving the desired comfort improvement.
Solution Approach 2:
A thin-walled cylindrical foam element is used, which provides flexibility and comfort through its visco-elastic properties without adding significant structural complexity. The thin-walled design allows the foam to conform to the ear canal shape while maintaining ease of insertion and removal.
3Ease of operation
If the foam element is made visco-elastic to conform to ear canal, then comfort is improved, but sound-attenuation effectiveness may deteriorate
Solution Approach 1:
The device uses a composite structure where the visco-elastic foam provides comfort and conformity to the ear canal, while the rigid stem with its specific geometry (including the curved distal flange and tapered stop) ensures effective sound attenuation. The rigid portion maintains the acoustic seal and blocks sound transmission, compensating for any potential weaknesses in the foam's sound-attenuation properties.
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 design provides enhanced sound-attenuation properties and improved user comfort by conforming to the ear canal with a visco-elastic foam element that slowly expands to fit and absorb sound, offering adjustable insertion and flexible positioning.
Implementation Method 1
a visco-elastic foam sound-attenuating element positioned on the earpiece stem to surround the attachment portion
Implementation Method 2
the sound-attenuating stem and the foam sound-attenuating element together are configured to fit into, and conform to the inner surface of, the user's ear canal with improved comfort and flexibility and with improved sound-attenuation properties
Data Source
AI summary
A sound attenuation system that includes a pliable stem for an earpiece and an earpiece incorporating the stem. The stem includes a curved sound-attenuating distal flange and an attachment portion configured to receive and retain a visco-elastic foam sound-attenuating element in a spaced-apart relation to the curved sound-attenuating distal flange, and a handle portion. The sound-attenuating stem and the foam sound-attenuating element together are configured to fit into the user's ear with improved comfort and flexibility. Some embodiments include a sound-conducting stem channel extending lengthwise through the stem. Some embodiments further include a sound filter configured to insert into the sound-conducting channel in the handle portion, the sound filter including lengthwise filter channel open to the stem channel, and a cover selectably movable to occlude the filter channel or to open the filter channel to external sounds and air pressure.