Wireless Earpiece Single Vent Design for Noise Reduction
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Solution Overview
Problem
Conventional wearable audio devices with venting ports in the front cavity compromise passive noise reduction and allow unwanted air and contaminants to enter, affecting sound quality and durability.
Innovation Solution
A wireless earpiece design with no venting port in the front cavity, featuring a single vent in the back cavity and a tortuous air path from the front to the back cavity, which acts as a low-pass filter to maintain acoustic energy and reduce noise while preventing external air entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If venting ports are provided in the front cavity, then air can be vented from the earpiece, but passive noise reduction is compromised and unwanted air and contaminants can enter
Solution Approach 1:
The patent removes the venting port from the front cavity and relocates it to the back cavity, extracting the harmful function (allowing contaminants to enter) from the front while preserving the useful function (venting air) in the back cavity
Solution Approach 2:
The patent introduces a tortuous air path as an intermediary mechanism between the front and back cavities, allowing air to pass through while the tortuous path acts as a low-pass filter that blocks high-frequency noise and contaminants
2Loss of energy
If multiple venting ports are provided, then air venting is improved, but device complexity increases
Solution Approach 1:
The patent combines the air venting function and the noise filtering function into a single vent located in the back cavity, eliminating the need for separate vents in the front and back cavities while maintaining effective air venting
Solution Approach 2:
The single back cavity vent serves multiple functions: it allows air to escape from the earpiece while the tortuous air path provides noise filtering and prevents contaminant ingress, making one vent perform the work of multiple vents
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
This design enhances passive noise reduction and maintains optimal low-frequency output without compromising frequency response, while minimizing dust and water ingress, resulting in improved sound quality and durability.
Implementation Method 1
a tortuous air path from the front to the back cavity, which acts as a low-pass filter to maintain acoustic energy and reduce noise
Data Source
AI summary
A wireless earpiece having no venting port extending from the interior of the earpiece housing to external to the housing on the side of the housing towards the earpiece wearer's ear. The earpiece has a housing defining a front cavity and a back cavity, the front cavity proximate a wearer's ear when the earpiece is positioned in the wearer's ear during use and the back cavity away from the wearer's ear when the earpiece is positioned in the wearer's ear. The earpiece has an audio output nozzle extending from the front cavity configured to extend at least partially within the wearer's ear. In some designs, the earpiece has no vent extending through the housing toward the wearer's ear when the earpiece is positioned in the wearer's ear, but may have a vent extending through the housing away from the wearer's ear when the earpiece is positioned in the wearer's ear.