Acoustic Mesh With Segmented Wind Noise Attenuation
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Solution Overview
Problem
Wireless listening devices face challenges in achieving high-end acoustic performance due to limited space and improper seals, leading to compromised user experience and sensitivity to wind noise, which affects the microphone's frequency response.
Innovation Solution
An acoustic mesh with a centrally acoustically closed portion and peripherally acoustically open portion is coupled to the microphone's acoustic port, providing up to 10 decibels of wind noise attenuation without impacting the frequency response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the microphone is left fully exposed to the ambient environment, then the frequency response is maintained, but wind noise attenuation is insufficient
Solution Approach 1:
The acoustic mesh applies local quality by creating distinct zones with different acoustic properties: a centrally acoustically closed portion for maximum wind noise attenuation and a peripherally acoustically open portion for maintaining frequency response. This spatial differentiation allows each region to optimize its function while working together as a unified shield.
Solution Approach 2:
The acoustic mesh is segmented into functionally distinct portions - the centrally acoustically closed portion and the peripherally acoustically open portion - rather than using a uniform structure. This segmentation enables the shield to simultaneously achieve wind noise attenuation in the center while preserving acoustic fidelity at the periphery.
2Reliability
If the acoustic mesh is made fully acoustically open, then the frequency response is maintained, but wind noise protection is reduced
Solution Approach 1:
Rather than making the entire mesh uniformly open or closed, the invention applies local quality by designating specific regions with different acoustic characteristics. The peripheral acoustically open portions maintain frequency response while the central acoustically closed portion provides wind noise protection.
Solution Approach 2:
The mesh is divided into segments with different acoustic properties - acoustically open segments at the periphery and acoustically closed segments in the center - allowing the system to balance between maintaining frequency response and providing wind noise attenuation.
3Object-affected harmful factors
If the acoustic mesh is made fully acoustically closed, then wind noise attenuation is maximized, but the frequency response is impacted
Solution Approach 1:
The acoustic mesh is segmented into acoustically closed and acoustically open portions, preventing the need to choose between complete closure for wind protection or complete openness for frequency response. The segmented structure allows both functions to coexist.
Solution Approach 2:
Instead of making the entire mesh closed to maximize wind noise attenuation, the invention inverts the approach by making the periphery open and only the center closed. This inverted configuration unexpectedly achieves both wind protection and frequency response maintenance.
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 acoustic mesh effectively reduces wind noise while maintaining the desired frequency response, enhancing the user experience by minimizing unwanted ambient sounds.
Implementation Method 1
The acoustic mesh may be an acoustic shield that has particular dimensions that have been found to reduce (or attenuate) wind noise (or other undesirable ambient sounds) without impacting a frequency response of the microphone
Implementation Method 2
The acoustic mesh may be acoustically closed at a center portion and acoustically open around a perimeter portion
Data Source
AI summary
An acoustic mesh comprising a first portion that is acoustically closed; and a second portion that surrounds the first portion and is acoustically open, wherein a surface area of the second portion is at least one percent a total surface area of the acoustic mesh.