Microphone Housing Mesh Screen Wind Noise Reduction
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Solution Overview
Problem
Wind noise significantly interferes with voice transmission and sound recording systems, particularly in outdoor and industrial environments, causing distortion and reducing the effectiveness of Automatic Speech Recognition (ASR) systems due to turbulent air flow and sustained sound pressure on microphones.
Innovation Solution
A compact microphone housing with a mesh or screen configuration on one side, featuring multiple small holes that distribute wind pressure across a larger surface, reducing sound pressure levels and minimizing distortion, allowing for high-quality audio capture even in windy conditions without the need for external attachments or additional materials like foam.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional foam windscreens or basket-style windscreens are used, then wind noise reduction is achieved, but device volume increases and foam degrades quickly
Solution Approach 1:
The patent divides the windscreen function into multiple segments: a rigid housing with integrated mesh screen and a separate foam insert. This segmentation allows the rigid structure to provide structural support and wind distribution while the foam provides noise reduction, achieving effective wind noise protection without requiring a large single-volume foam windscreen
Solution Approach 2:
The patent implements nesting by placing a foam windscreen insert inside a rigid housing cavity. The foam is nested within the housing structure, allowing the compact integration of both rigid and flexible wind noise reduction components in a space-efficient manner
2Object-affected harmful factors
If foam material is used for wind noise reduction, then wind noise is attenuated, but the foam degrades quickly
Solution Approach 1:
The patent provides beforehand cushioning by incorporating a removable foam insert that can be replaced when degraded. The rigid housing structure is designed to accommodate foam replacement, allowing users to maintain wind noise reduction effectiveness by swapping degraded foam inserts for new ones without replacing the entire assembly
Solution Approach 2:
The patent enables discarding and recovering by allowing the foam insert to be removed and replaced independently from the rigid housing. When the foam degrades, it can be discarded and a new foam insert installed, recovering the wind noise reduction function without wasting the durable rigid housing structure
3Measurement precision
If multiple microphones are added to devices, then audio quality and spatial recording are improved, but device complexity increases
Solution Approach 1:
The patent merges the housing structure with the windscreen function, creating an integrated assembly where the housing itself serves as part of the wind noise reduction system. This merging reduces overall device complexity by eliminating separate windscreen components while maintaining audio quality through the integrated mesh screen and foam insert design
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 solution effectively attenuates wind noise by up to 12 dB, enabling reliable ASR and improved audio quality under severe wind conditions, enhancing the performance of communication devices and wearable technology.
Implementation Method 1
A compact microphone housing with a mesh or screen configuration on one side, featuring multiple small holes that distribute wind pressure across a larger surface, reducing sound pressure levels
Implementation Method 2
The solution effectively attenuates wind noise by up to 12 dB, enabling reliable ASR and improved audio quality under severe wind conditions
Data Source
AI summary
A microphone housing is described with a screen for wind noise reduction. One example includes a housing defining a cavity and a surface on one side of the cavity, a mesh of holes through the surface into the cavity, and a microphone mounted inside the cavity.