Bone Conduction Speaker Auricle Adhesion Sound Quality

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Solution Overview

Problem

Conventional bone conductive sound generating devices experience reduced sound quality due to the frequency bandwidth being reduced when sound is conducted through bones, leading to poor listening experiences.

Innovation Solution

The bone conductive sound generating device is designed to adhere to the back of the auricle, utilizing the cartilage's lower rigidity to efficiently conduct low-frequency sound vibrations, and compensates for sound losses by generating corresponding air-conducted sounds.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If sound is conducted through bones using conventional bone conductive sound generating devices, then sound transmission efficiency is improved, but frequency bandwidth is reduced leading to poor sound quality

Engineering Contradiction:

Improvesound transmission efficiencyVSAvoidfrequency bandwidth

Core Design Contradiction:

Loss of energyVSLoss of information

Solution Approach 1:

The invention divides the sound transmission path into two separate channels: a bone conduction channel for efficient sound transmission and an air conduction channel for preserving frequency bandwidth. The sound generating device includes both a bone conduction speaker and an air conduction speaker, each handling different aspects of sound transmission to collectively resolve the contradiction between transmission efficiency and frequency preservation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention merges bone conduction and air conduction into a unified sound transmission system. By combining the advantages of both conduction methods in a single device, the system achieves both high transmission efficiency (from bone conduction) and preserved frequency bandwidth (from air conduction), thereby improving overall sound quality.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If a bone conduction speaker is adhered to the mastoid or skull, then the device can transmit sound through bones, but the frequency bandwidth is reduced resulting in poor sound quality

Engineering Contradiction:

Improvebone conduction functionalityVSAvoidsound quality

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The invention segments the sound transmission function into two independent but complementary pathways: bone conduction for reliable sound transmission and air conduction for maintaining sound quality. This segmentation allows each pathway to optimize its specific function while working together to provide both reliability and high sound quality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention uses a composite approach by integrating two different sound conduction mechanisms (bone and air) into a single device system. This composite structure leverages the strengths of both conduction methods to achieve both reliable sound transmission and preserved sound quality simultaneously.

Inventive Principle:

Principle #40Composite materials

3Ease of operation

If sound is conducted through skin and subcutaneous tissues to bones, then bone conduction hearing is generated, but the frequency bandwidth is reduced

Engineering Contradiction:

Improvebone conduction hearing capabilityVSAvoidfrequency bandwidth

Core Design Contradiction:

Ease of operationVSLoss of information

Solution Approach 1:

The invention introduces air conduction as an intermediary pathway that compensates for the frequency bandwidth loss in bone conduction. The air conduction speaker acts as a mediator that provides the missing frequency information, allowing the bone conduction pathway to maintain its ease of operation while the overall system preserves complete frequency bandwidth.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 approach enhances sound quality by reducing losses in low-frequency sound during bone conduction and improving the overall listening experience.

Implementation Method 1

the sound/vibration may be conducted through the cartilage of the auricle... the cartilage has reduced rigidity, an efficiency of conducting a low frequency sound/vibration may be high

Methodology Applied

Scientific EffectBone conduction: Vibration

Implementation Method 2

a bone conductive vibrating speaker may transfer an electrical audio signal into a mechanical vibration signal, and the mechanical vibration signal may be conducted into a cochlea through biological tissues or bones

Methodology Applied

Scientific EffectElectromechanical transduction:

Implementation Method 3

the auricle and other tissues connected to the auricle may vibrate correspondingly, generating a corresponding air conducted sound

Methodology Applied

Scientific EffectAir conduction: Sound

Data Source

PatentEP3739900B1Bone conduction sound device

Publication Date: 2025.05.21 SHENZHEN SHOKZ CO LTD

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AI summary

A bone conductive sound generating device is provided and includes a sound generating mechanism and a fixing mechanism. The fixing mechanism is configured to act on the sound generating mechanism, such that the sound generating mechanism adheres to and fit with a back of an auricle of a user at least when the sound generating mechanism is in use. Accordingly, the present application may improve the sound quality of the bone conductive sound generating device, improving listening experience for the user.