Bone Conduction Earphone Multi-Vibration System
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bone conduction earphones suffer from significant sound leakage, poor sound field effects, and inferior frequency response, particularly in low frequencies, due to their single speaker design, affecting user experience.
Innovation Solution
A bone conduction earphone with a multi-vibration system comprising a bone conduction speaker and passive radiators connected through connecting rods, which enhance vibration quality and frequency response without increasing power consumption, improving sound field radiation and low-frequency response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single bone conduction speaker is used, then the device complexity is low, but the sound quality and frequency response are poor
Solution Approach 1:
The single speaker is segmented into two functional components: an active bone conduction speaker and a passive radiator. The active speaker generates vibrations while the passive radiator reproduces sound waves without requiring its own power source or driving coil, thus improving sound quality while maintaining simple device structure
Solution Approach 2:
A connecting rod is introduced as an intermediary mechanical element to transmit vibrations from the active bone conduction speaker to the passive radiator. This mechanical coupling enables the passive radiator to be driven without electrical connection or additional power consumption, resolving the contradiction between simplicity and performance
2Manufacturing precision
If multiple passive radiators are added to improve sound field effect, then the frequency response improves, but the device complexity increases
Solution Approach 1:
The passive radiator serves multiple functions simultaneously: it acts as a sound reproduction element, a mechanical lever arm for vibration amplification, and a structural component that can be integrated into the existing bone conduction speaker housing. This multi-functionality allows improvement in frequency response without proportionally increasing device complexity
Solution Approach 2:
The passive radiator is positioned at a different spatial dimension (extended outward from the main body) to create a larger vibration amplitude and improve low-frequency response. This dimensional extension enhances sound field effect without significantly increasing the core device complexity
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 multi-vibration system effectively enhances sound quality and frequency response, particularly in low frequencies, while maintaining efficient power usage, thereby improving user experience and reducing sound leakage.
Implementation Method 1
a bone conduction speaker mounted on the main body and capable of transmitting sound waves to a human ear when excited by an audio signal to vibrate
Implementation Method 2
the passive radiator is capable of being driven to vibrate synchronously through the connecting rod when the bone conduction speaker is excited by an audio signal to vibrate
Data Source
AI summary
Provided is a bone conduction earphone that includes a main body, and a bone conduction speaker and a passive radiator that are mounted on the main body. The passive radiator is connected to the bone conduction speaker through a connecting rod. When vibrating by being excited by an audio signal, the bone conduction speaker drives the passive radiator to vibrate synchronously through the connecting rod. The passive radiator and the bone conduction speaker cooperate with each other to form a multi-vibration system, thereby effectively enhancing the quality of vibration, improving the effect of sound field radiation, and improving the frequency response, especially remedying the deficiencies in low-frequency response.