Microphone Module Wind Noise Reduction via Acoustic Chamber
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Solution Overview
Problem
Miniaturized wearable electronic devices face challenges in reducing wind noise, which degrades the active noise canceling function due to microphone module vibrations caused by wind flowing into the device.
Innovation Solution
The electronic device incorporates a housing with a microphone hole and a support member featuring an antenna structure and microphone chambers, along with a sound absorbing member, to reduce wind noise by transmitting wind vibrations to the microphone module through these chambers and absorbing members, thereby minimizing module vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the electronic device is miniaturized to reduce size and weight, then the device can be worn on the body without inconvenience, but wind noise increases due to microphone module vibrations caused by wind flowing into the device
Solution Approach 1:
A wind noise reduction member is introduced as an intermediary component between the microphone hole and the microphone module. This member includes a first portion extending from the microphone hole and a second portion extending from the microphone module, with the portions facing each other to form a wind noise reduction chamber, thereby mediating the wind flow to reduce harmful vibrations on the microphone module
Solution Approach 2:
The harmful wind noise is extracted and isolated from the microphone module by creating a separate wind noise reduction chamber. The wind noise reduction member diverts and contains the wind flow away from the microphone module, separating the harmful wind effect from the sensitive microphone component
2Measurement precision
If the microphone module is exposed to the outside environment to capture sound, then sound quality is maintained, but wind noise enters the device through the microphone hole causing module vibrations
Solution Approach 1:
The wind noise reduction member acts as a mediator that allows sound waves to pass through while blocking direct wind flow to the microphone module. The first and second portions form a chamber that mediates between the external sound environment and the internal microphone component
Solution Approach 2:
The wind noise reduction member has different structural characteristics at different locations: the first portion extends from the microphone hole with specific geometry, and the second portion extends from the microphone module with complementary geometry, creating localized wind flow management zones
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 configuration effectively reduces wind noise, enhancing the performance of the active noise canceling function by minimizing turbulence and maintaining sound quality.
Implementation Method 1
a sound absorbing member arranged in at least one of the first microphone chamber or the second microphone chamber
Data Source
AI summary
An electronic device is provided. The electronic device includes a housing including a microphone hole, a support member connected to the housing, wherein the support member includes an antenna structure facing at least a part of the housing and a microphone chamber configured to receive external sound of the electronic device from the microphone hole, and a microphone module connected to the support member and configured to receive external sound of the electronic device through the microphone hole and the microphone chamber.