Earphone Vent Valve Control for Call Voice Comfort
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Solution Overview
Problem
Existing earphones often cause discomfort by reverberating the wearer's voice and blocking ambient sound, leading to an uncomfortable listening experience, especially during calls and music playback.
Innovation Solution
The earphone design includes a housing with a ventilation path and a valve that can switch between open and closed states, controlled by a control unit to adaptively adjust sound listening based on the user's operation, such as during calls or music playback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the earphone closes the ear to block ambient sound, then noise cancellation performance is improved, but the wearer's voice becomes reverberated and uncomfortable
Solution Approach 1:
The earphone dynamically switches the valve between open and closed states based on the detected operation mode. During call operations, the valve opens to allow ambient sound entry and prevent voice reverberation. During music playback, the valve closes to block ambient sound and enhance noise cancellation. This dynamic adaptation resolves the contradiction by making the acoustic environment context-dependent.
Solution Approach 2:
The system changes the acoustic parameter (ambient sound transmission) by controlling the valve state. The control unit detects the operation mode and adjusts the valve position parameter accordingly, transforming the fixed acoustic environment into a variable one that adapts to different usage scenarios, thereby resolving the conflict between noise blocking and voice comfort.
2Object-affected harmful factors
If the earphone closes the ear to block ambient sound, then noise cancellation is improved, but adaptability to different usage situations deteriorates
Solution Approach 1:
The earphone transitions from a static acoustic environment (fixed closed state) to a dynamic one where the valve state changes based on operation mode detection. The control unit monitors whether the device is in call or music mode and automatically adjusts the valve, enabling the system to adapt to different usage situations while maintaining noise cancellation performance where needed.
Solution Approach 2:
The valve mechanism serves multiple functions: it blocks ambient sound during music playback for noise cancellation, and it opens during calls to allow natural voice transmission and ambient sound awareness. This multi-functionality resolves the contradiction by making a single component serve different purposes based on contextual needs.
3Object-affected harmful factors
If the earphone maintains a fixed closed state, then noise cancellation is improved, but device complexity increases due to adaptive control mechanisms
Solution Approach 1:
The control unit automatically detects the operation mode (call or music playback) and autonomously controls the valve state without requiring user intervention. The system serves itself by monitoring its own operational context and making appropriate acoustic adjustments, which adds minimal complexity while achieving adaptive functionality.
Solution Approach 2:
The control unit receives feedback about the current operation mode from the audio processing system and uses this information to adjust the valve state. This feedback loop enables automatic adaptation to different usage situations with a simple control architecture, resolving the contradiction between noise cancellation and adaptability without significantly increasing system complexity.
Data Source
AI summary
An earphone includes a housing having a space therein and having a path capable of ventilation from one end side on an external auditory canal side of a wearer to the other end side on an ambient environment side, a valve accommodated in the housing and configured to switch the path between an open state and a close state, a microphone disposed on one end side of the housing and configured to collect uttered voice of the wearer, and a control unit configured to control the open state and the close state. The control unit switches the path to the open state during a first operation in a call including an operation in which the uttered voice of the wearer is collected by the microphone, and switches the path either the open state or the close state during a second operation different from the first operation.