Bone Conduction Device Sound Leakage Suppression
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Solution Overview
Problem
Bone conduction acoustic transmission devices suffer from sound leakage to the external environment due to the vibrating member causing the skull to vibrate continuously, leading to unintended sound transmission beyond the user.
Innovation Solution
A bone conduction acoustic transmission device is designed with a first magnetic body placed in contact with the head and a separate coil unit, where the coil unit is mounted on the head, causing the first magnetic body to vibrate in response to an acoustic signal, while a second magnetic body within the coil unit does not vibrate, and a vibration damping member is used to minimize external sound leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vibrating member is used to cause the skull to vibrate continuously, then sound transmission to the user is achieved, but sound leakage to the external environment occurs
Solution Approach 1:
The acoustic transmission device is divided into two separate components: a first magnetic body that is placed on the head and a coil unit that is held separately. This segmentation allows the vibrating member to be isolated from the external environment, enabling sound transmission to the skull while preventing sound leakage to the outside.
Solution Approach 2:
The vibrating member (coil unit) is extracted from direct contact with the head, instead being held separately by a holding member. This extraction removes the source of sound leakage from proximity to the external environment while maintaining its function of vibrating the first magnetic body against the skull.
2Reliability
If the vibrating member is placed in contact with the head, then bone conduction is achieved, but the device structure becomes complex
Solution Approach 1:
The holding member integrates multiple functions: it holds the coil unit, positions it correctly against the head, and provides a magnet that interacts with the first magnetic body. This merging of functions into a single component simplifies the overall device structure while maintaining effective bone conduction.
Solution Approach 2:
The holding member serves multiple purposes simultaneously: structural support for the coil unit, positioning mechanism, and magnetic interaction component. This multi-functionality reduces the number of separate components needed, thereby simplifying the device structure.
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
This configuration effectively suppresses sound leakage to the external environment, allowing for reliable acoustic transmission to the user while maintaining comfort and inconspicuousness.
Implementation Method 1
a coil unit provided separately from the first magnetic body, wherein the coil unit has a coil configured using a predetermined casing that can be mounted on the first magnetic body
Implementation Method 2
a vibration damping member is used to minimize external sound leakage
Data Source
AI summary
A bone conduction acoustic transmission device according to the present invention is provided with a first magnetic body to be placed in contact with or to be embedded in the head of a living body beforehand, and a coil unit provided separately from the first magnetic body. The coil unit has a coil configured using a predetermined casing that can be mounted on the first magnetic body and a second magnetic body which is provided in a predetermined position of the casing and does not vibrate due to the coil, and the first magnetic body vibrates as a result of applying an acoustic signal to the coil with the coil unit mounted on the head.