Bone Conduction Speaker Clamping Force for Sound and Comfort
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Solution Overview
Problem
Existing bone conduction speakers face challenges in enhancing sound quality, particularly heavy bass, and reducing sound leakage while improving wearing comfort.
Innovation Solution
The bone conduction speaker design includes a vibration unit with a headset bracket providing a clamping force between 0.3 N and 1.5 N, utilizing specific materials and structures for the panel and vibration transfer layer to optimize sound transmission and reduce sound leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the clamping force is increased to improve sound transmission efficiency, then sound quality improves, but wearing comfort deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the clamping force within a specific range (0.3N to 1.5N) to optimize the balance between sound transmission efficiency and wearing comfort. This quantitative parameter optimization ensures sufficient contact for vibration transfer while preventing excessive force that would cause discomfort or pain to the user.
Solution Approach 2:
The patent incorporates dynamic adjustment mechanisms that allow the clamping force to adapt to different users and usage conditions. The system can dynamically adjust the force applied to the temporal bone, enabling optimal performance across varying scenarios while maintaining comfort standards.
2Reliability
If the contact surface area is increased to improve sound transmission, then bass quality improves, but the device becomes less comfortable to wear
Solution Approach 1:
The patent applies local quality by optimizing the contact surface characteristics at specific locations on the temporal bone. Rather than uniformly increasing contact area, the design focuses on creating appropriate contact properties at key vibration transfer points, ensuring effective bass transmission while maintaining overall comfort through localized optimization.
3Reliability
If the vibration transfer layer is made stiffer to improve sound transmission, then sound quality improves, but sound leakage increases
Solution Approach 1:
The patent applies composite materials in the vibration transfer layer to achieve a balance between stiffness for sound transmission and flexibility for preventing sound leakage. The composite structure combines materials with different properties, allowing the layer to effectively transfer vibrations while maintaining adequate isolation to prevent sound from leaking to the external environment.
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 enhances sound quality by improving sound transmission efficiency and reducing sound leakage, providing a comfortable wearing experience.
Implementation Method 1
A bone conduction speaker may transfer vibrations via the person's skin, subcutaneous tissue and bones to auditory nerves, thereby enabling the person to hear the sound.
Implementation Method 2
The headset bracket providing a force between the contact surface and the user, the force between the contact surface and the user being larger than 0.3 N and smaller than 1.5 N.
Data Source
AI summary
Methods and apparatus are described herein related to improving the sound quality of a bone conduction speaker. The sound quality of the bone conduction speaker is adjusted in the sound generation, sound transferring, and sound receiving of the bone conduction speaker by designing vibration generation manners and vibration transfer structures.