Rear Earphone Sound Guide With Reverberation and Ventilation
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Solution Overview
Problem
Current Bluetooth earphones with front-positioned loudspeakers face issues of restricted airflow leading to bacterial growth, poor ventilation, and safety risks due to sound isolation, making them unsafe for use while walking.
Innovation Solution
A sound guiding and reverberation component for a rear loudspeaker that includes a sound conducting component, sealing connector, and sound guiding upper cover, allowing sound waves to propagate through a hollow channel and outlet holes, forming reverberant sound waves while ensuring ventilation and external sound reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the surface cover completely encloses the ear canal opening to provide sound isolation, then sound waves can enter the ear canal effectively, but airflow is restricted leading to bacterial growth and poor ventilation
Solution Approach 1:
The sound guiding component is divided into multiple functional zones: a sound transmission channel for direct sound delivery, annular sound outlet holes for reverberant sound, and ventilation channels for air flow. This segmentation allows each zone to perform its specific function without interfering with others, resolving the contradiction between sound isolation and ventilation.
Solution Approach 2:
The sound guiding component acts as an intermediary structure between the ear canal opening and the external environment. It mediates between the need for sound isolation and the need for ventilation by providing dedicated pathways for sound transmission while allowing air to pass through separate ventilation channels.
2Reliability
If the surface cover completely encloses the ear canal opening to provide sound isolation, then sound waves can enter the ear canal effectively, but external sounds cannot pass through making it unsafe for use while walking
Solution Approach 1:
The sound guiding component segments sound transmission into two pathways: direct sound through the central sound transmission channel and reverberant sound through the annular sound outlet holes. The ventilation channels further segment the structure to allow external sound and air passage, resolving the contradiction between sound isolation and external sound perception.
Solution Approach 2:
Different regions of the sound guiding component have different properties: the central sound transmission channel provides sound isolation, while the annular sound outlet holes and ventilation channels provide pathways for external sound and air flow. This local differentiation of properties resolves the contradiction between sound isolation and external sound perception.
3Productivity
If the loudspeaker is positioned at the front position facing the ear canal directly, then sound transmission is direct and efficient, but reverberant sound waves cannot form reducing sound quality
Solution Approach 1:
The invention transitions from a single-dimensional direct sound transmission approach to a multi-dimensional sound field structure. The sound guiding component creates both direct sound paths and reverberant sound paths through its three-dimensional structure with central and annular openings, allowing simultaneous efficient transmission and quality enhancement.
Solution Approach 2:
The sound transmission function is segmented into direct sound transmission through the central channel and reverberant sound transmission through the annular holes. This segmentation allows both direct efficiency and reverberant quality to coexist without compromising either aspect.
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
Improves sound quality and user safety by allowing reverberant sound waves and external sound perception, while maintaining ear canal ventilation and reducing bacterial growth risks.
Implementation Method 1
the sound guiding and reverberation component is provided with an internally hollow and communicated sound transmission channel
Implementation Method 2
the sound transmission channel located on a side of a back shell of the housing is provided with annularly arranged sound outlet holes which are evenly distributed in a ring shape
Data Source
AI summary
The present disclosure discloses a sound guiding and reverberation component for a rear loudspeaker of a Bluetooth earphone. A sound guiding and reverberation component penetrating through the entire housing and a through sound transmission channel are disposed at a front position of a Bluetooth earphone body; a sealed cavity is disposed in a space between a position below a rear position of a mainboard, the sound guiding and reverberation component, and a back shell, and a loudspeaker is located in the sealed cavity; the sealed cavity forces original sound waves emitted by the loudspeaker to flow only from the sound outlet holes to mix with the flowing air within the channel, causing the original sound waves to superimpose multiple times to form reverberated sound waves.