Bone Conduction Speaker Vibration Isolation via Segmented Mounting
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Solution Overview
Problem
Bone-conduction speakers in wearable computing devices generate undesirable external vibrations that produce distracting sound waves entering the wearer's outer ear through air, disrupting the intended audio experience.
Innovation Solution
A support structure with a recessed section and extending members is used to house a bone-conduction transducer, minimizing contact points and creating gaps to reduce external vibrations, thereby minimizing sound waves entering the ear through air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the bone-conduction transducer is directly mounted in the support structure, then the structural simplicity is improved, but external vibrations are transmitted to the support structure causing distracting sound waves
Solution Approach 1:
The patent segments the mounting structure by introducing separate mounting members that extend from the recessed structure, rather than directly mounting the transducer to the support structure. This segmentation isolates the vibration path, allowing the transducer to be held in place while preventing external vibrations from transmitting to the main support structure.
Solution Approach 2:
The mounting members act as intermediaries between the bone-conduction transducer and the recessed structure. These members provide a controlled interface that holds the transducer in position while minimizing the transmission of external vibrations to the support structure, thus mediating the vibration path.
2Object-generated harmful factors
If gaps are created between the transducer and recessed structure, then external vibration transmission is reduced, but the stability of the transducer mounting is worsened
Solution Approach 1:
The patent applies local quality by creating gaps in specific locations between the transducer and the recessed structure, while maintaining contact through the mounting members. This localized gap creation reduces external vibration transmission in critical areas while preserving mounting stability through the extended members that still provide secure attachment.
Solution Approach 2:
The mounting members extend dynamically from the recessed structure toward the cavity, providing flexible yet stable contact with the transducer. This dynamic extension allows the structure to accommodate the transducer while maintaining stable mounting, even with gaps present in the overall assembly.
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 solution effectively reduces external vibrations and sound waves entering the wearer's outer ear, enhancing the audio experience by isolating the transducer's vibrations and transmitting them directly to the bone structure for improved sound delivery.
Implementation Method 1
a second portion is in contact with a wearer so as to transmit a target vibration of the second portion to a bone structure of the wearer
Implementation Method 2
The at least one member is configured to transmit a vibration of the first portion of the bone-conduction transducer to the recessed structure
Data Source
AI summary
This disclosure relates to bone conduction. One disclosed apparatus includes a support structure and a bone-conduction transducer (BCT). The support structure includes a front section and a side section. The side section includes a recessed structure and at least one member that extends from the recessed structure. The BCT includes a first portion and a second portion. The first portion is in contact with the at least one member such that at least one gap is defined between the BCT and the recessed structure. When the support structure is worn, the second portion is in contact with a wearer so as to transmit a target vibration of the second portion to a bone structure of the wearer. The at least one member is configured to transmit a vibration of the first portion of the BCT to the recessed structure.