Woven Mesh Wind Noise Suppression via Segmented Cavity
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Solution Overview
Problem
Conventional devices fail to effectively suppress wind noise caused by irregular airflow impacts on electronic devices, particularly in microphone functions, due to their inability to manage continuous pressure fluctuations effectively.
Innovation Solution
A wind noise suppression device comprising a first woven mesh covering the sound pickup hole, a structural component with a sound transmission hole, and a second woven mesh covering the sound transmission hole, which together reduce wind noise energy by minimizing airflow disturbances and pressure fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional pressure protection components are used, then sudden pressure changes are mitigated, but continuous pressure fluctuation from airflow remains ineffective suppressed
Solution Approach 1:
The wind noise suppression device segments the airflow path into multiple zones using a first woven mesh, a structural component with cavity, and a second woven mesh. Each segment performs a specific function: the first mesh reduces turbulence at the sound pickup hole, the cavity manages pressure fluctuations, and the second mesh protects the microphone diaphragm. This segmentation allows effective suppression of continuous pressure fluctuations that single-component solutions cannot handle.
Solution Approach 2:
The structural component with cavity acts as an intermediary between the external airflow and the microphone. It absorbs and dampens pressure fluctuations before they reach the microphone diaphragm, while still allowing audio signals to pass through. This intermediary structure resolves the contradiction by mediating between the harmful airflow and the sensitive microphone.
2Object-affected harmful factors
If woven mesh is added to reduce airflow disturbance, then wind noise is suppressed, but device complexity increases
Solution Approach 1:
The woven mesh structures serve multiple functions simultaneously: they reduce airflow turbulence, dampen pressure fluctuations, and allow acoustic signals to pass through. This multi-functionality reduces device complexity by consolidating what would otherwise require separate components for each function into a single versatile element.
Solution Approach 2:
The woven mesh uses porous structure to achieve wind noise suppression while maintaining acoustic transparency. The porous material allows sound waves to pass through while physically disrupting turbulent airflow patterns, thereby reducing wind noise without significantly increasing device complexity.
3Object-affected harmful factors
If multiple mesh layers and structural components are added, then wind noise energy is reduced, but manufacturing complexity increases
Solution Approach 1:
The structural component introduces a spatial dimension with its cavity depth (distance between sound transmission hole and sound pickup hole plane ≥ preset threshold). This three-dimensional structure creates acoustic damping zones that reduce wind noise energy without requiring excessive horizontal space, making the device more manufacturable and space-efficient.
4Object-affected harmful factors
If structural component depth is increased to improve wind noise suppression, then wind noise reduction effectiveness increases, but device volume increases
Solution Approach 1:
The patent specifies that the distance between the sound transmission hole and the sound pickup hole plane should be greater than or equal to a preset threshold. This parameter optimization ensures sufficient acoustic damping effect for wind noise suppression while controlling the overall device volume, balancing effectiveness with compactness.
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 device significantly reduces wind noise energy, improving user experience by minimizing the wind noise sound heard by the user when using a microphone function, while maintaining effective audio signal capture.
Implementation Method 1
The first woven mesh is configured to reduce disturbance of an airflow inside the device caused by an airflow outside the device housing entering the device through the sound pickup hole, and reduce pressure fluctuation of the airflow outside the device housing at the sound pickup hole
Implementation Method 2
The second woven mesh is configured to reduce impact of an airflow change in the cavity on a diaphragm of the microphone connected to the sound transmission hole
Data Source
AI summary
Embodiments of this application disclose a wind noise suppression device including a first woven mesh, a second woven mesh, a device housing, and a structural component. The device housing defines a sound pickup hole. The first woven mesh covers the sound pickup hole. The structural component is disposed behind the sound pickup hole. The structural component is coupled to the device housing and forms a cavity. The structural component defines a sound transmission hole. The second woven mesh covers the sound transmission hole. A microphone is disposed at the sound transmission hole. Due to the structural characteristics of all the components the device, wind noise included in an audio signal that is be received by the microphone through the sound transmission hole is effectively reduced.