Headphone Earmuff Module Microphone Positioning
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Solution Overview
Problem
Conventional headphones with detachable earmuffs often position microphones far from the user's mouth, leading to poor sound reception due to the increased distance, compromising both microphone convenience and sound quality.
Innovation Solution
The earmuff module design incorporates a microphone assembly on the inner surface of the back cover, with a sound-receiving hole and an extension part of the earmuff covering it, allowing for easy replacement without affecting microphone operation and positioning the microphone close to the user's mouth for improved sound reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the microphone is disposed at a position away from the user's mouth to allow easy earmuff replacement, then the ease of operation is improved, but the sound-receiving effect deteriorates
Solution Approach 1:
The back cover is divided into two separate casings: a first casing that remains fixed and a second casing that can be detached with the earmuff. The microphone assembly is mounted on the fixed first casing, ensuring stable sound reception, while the detachable second casing allows easy earmuff replacement without affecting microphone operation.
Solution Approach 2:
The second casing containing the peripheral side wall and sound-receiving hole is extracted as a separate detachable component from the first casing. This allows the earmuff and second casing to be removed together for replacement, while the microphone assembly remains securely mounted on the first casing, resolving the contradiction between ease of replacement and sound reception quality.
2Measurement precision
If the microphone assembly is positioned on the inner surface of the peripheral side wall, then the sound-receiving effect is improved by being close to the user's mouth, but the complexity of the device structure increases
Solution Approach 1:
The microphone assembly, sound-receiving hole, and peripheral side wall are merged into an integrated second casing that can be detached as a single unit. This combining approach allows the microphone to be positioned optimally on the inner surface of the peripheral side wall for improved sound reception, while the entire assembly remains simple to replace by detaching the pre-formed second casing.
Data Source
AI summary
An earmuff module of a headphone includes a back cover, a sound-receiving hole, a microphone assembly, and an earmuff. The back cover includes a peripheral side wall. The sound-receiving hole is formed on the peripheral side wall of the back cover and penetrates through the peripheral side wall. The microphone assembly is disposed on an inner surface of the peripheral side wall and corresponds to the sound-receiving hole, and is acoustically connected with the sound-receiving hole. The earmuff is detachably assembled on the back cover, and the earmuff includes a foam and a wrapping cover. The wrapping cover includes an extension part and a covering part. The covering part covers the foam. The extension part extends from one end of the covering part to an outer surface of the peripheral side wall and covers the sound-receiving hole. The microphone assembly is located within a range covered by the extension part.