Internal Windscreen Microphone Housing for Outdoor Wind Noise
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Solution Overview
Problem
Microphone devices installed outside buildings are susceptible to wind noise and hydrolysis of windscreens due to exposure to wind and rain, leading to deteriorated frequency characteristics and reduced sound pickup ability.
Innovation Solution
A microphone device design with a hollow cylindrical housing and a cap containing sound guide holes, accommodating a windscreen part between the cap and microphone, which includes high-density and low-density windscreen components to reduce wind pressure and noise, while maintaining sound guidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a windscreen is provided outside the housing to reduce wind noise, then wind noise reduction is improved, but the windscreen deteriorates due to exposure to rain and moisture
Solution Approach 1:
The windscreen part is extracted from the external environment and placed inside the housing body, removing it from direct exposure to rain and moisture while maintaining its wind noise reduction function
Solution Approach 2:
The windscreen part is nested inside the housing body, positioned between the cap and the microphone, protecting it from environmental degradation while maintaining its functional effectiveness
2Object-affected harmful factors
If the windscreen is placed outside the housing, then wind noise is reduced, but the device size increases and becomes more conspicuous
Solution Approach 1:
The windscreen part is merged with the internal structure of the housing body, combining the wind protection function with the existing device volume rather than adding external bulk
Solution Approach 2:
The windscreen is nested within the existing housing dimensions, utilizing internal space to accommodate the wind protection component without increasing overall device size
3Object-affected harmful factors
If a conventional windscreen is used, then wind noise is reduced, but the frequency characteristic in low frequency band deteriorates over time
Solution Approach 1:
The windscreen part is taken out from external exposure and placed inside the sealed housing, preventing environmental factors from degrading its acoustic performance and maintaining stable frequency characteristics
Solution Approach 2:
Instead of protecting the microphone from wind externally, the approach inverts by protecting the windscreen from environmental damage internally, ensuring long-term maintenance of frequency characteristics
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 minimizes wind noise impact, maintains frequency characteristics, and extends the lifespan of the windscreen by protecting it from environmental exposure, reducing size and conspicuousness for security applications.
Implementation Method 1
a windscreen part that reduces a pressure of wind entering into the housing portion
Implementation Method 2
the cap is solid and includes a sound guide hole that guides the sound wave to the microphone
Data Source
AI summary
Provided is a microphone device with a reduced impact on a windscreen (a windscreen part) caused by an installed environment. The microphone device includes a microphone that outputs an electrical signal in response to a sound wave, a housing portion that accommodates the microphone, and a windscreen part that reduces a pressure of wind caused by the wind entering into the housing portion. The housing portion includes a hollow cylindrical housing body and a cap attached to one end of the housing body in the axial direction of the housing body. The windscreen part is accommodated in the housing body and disposed between the cap and the microphone. The cap is solid. The cap includes a sound guide hole that guides the sound wave to the microphone. The sound guide hole is disposed along the axial direction.