Bone Conduction Microphone Laminate for Stronger Signal Coupling
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Solution Overview
Problem
Existing bone conduction microphones are complex and have insufficient connection strength among components, leading to reliability issues that affect the output signal.
Innovation Solution
A bone conduction sound transmission device with a laminated structure comprising a vibration unit and an acoustic transducer unit, where the laminated structure is connected to a base structure, and the acoustic transducer unit generates an electrical signal based on the deformation of the vibration unit, utilizing a piezoelectric layer and electrode layers to convert vibrations into electrical signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing bone conduction microphones use complex multi-component structures, then they can achieve sound transmission function, but the connection strength between components is insufficient and reliability is reduced
Solution Approach 1:
The patent combines the vibration unit and acoustic transducer unit into a single integrated laminated structure, eliminating multiple separate components and their interconnections. This merging approach directly resolves the contradiction by improving connection strength (through integration) while reducing structure complexity (by eliminating redundant components).
Solution Approach 2:
The laminated structure uses composite material construction with multiple functional layers (vibration unit, acoustic transducer unit, elastic layers, piezoelectric layers) bonded together. This composite approach enhances the overall strength and reliability of the connection between functional elements while maintaining a compact, unified structure rather than separate components.
2Reliability
If existing bone conduction microphones use multiple separate components, then they can achieve sound transmission, but the output signal quality is affected due to insufficient connection strength
Solution Approach 1:
The integration of vibration unit and acoustic transducer unit into one laminated structure eliminates weak mechanical connections between separate components, thereby improving signal reliability by ensuring strong, stable connections. Simultaneously, the reduced component quantity directly addresses the complexity issue.
Solution Approach 2:
The laminated composite structure provides strong mechanical bonding between functional units, ensuring reliable signal transmission without the connection weaknesses that plague multi-component assemblies. The composite construction maintains signal integrity while simplifying the overall device architecture.
3Device complexity
If the laminated structure is physically connected to the base structure, then the structure is simplified and stability is enhanced, but the connection area is reduced
Solution Approach 1:
The patent applies local quality by concentrating the connection function at specific locations (one end of the laminated structure connected to the base structure) rather than distributing connections across the entire structure. This localized connection approach simplifies the overall structure while maintaining adequate connection area at the critical connection point.
Solution Approach 2:
The laminated structure is segmented into distinct functional units (vibration unit, acoustic transducer unit) that are integrated together, with only one end requiring connection to the base structure. This segmentation allows for structure simplification while maintaining sufficient connection area at the single connection point.
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 provides a simpler structure with enhanced stability and reliability, improving the signal-to-noise ratio and sensitivity of the bone conduction sound transmission device.
Implementation Method 1
The acoustic transducer unit may include at least a first electrode layer, a piezoelectric layer, and a second electrode layer arranged in sequence from top to bottom. The acoustic transducer unit may generate an electrical signal based on the deformation of the vibration unit.
Data Source
AI summary
The present disclosure is of a bone conduction sound transmission device. The bone conduction sound transmission device comprises a laminated structure and a base structure. The laminated structure is formed by a vibration unit and an acoustic transducer unit. A base structure is configured to load the laminated structure, and at least one side of the laminated structure is physically connected to the base structure. The base structure vibrates based on an external vibration signal, and the vibration unit deforms in response to the vibration of the base structure; and the acoustic transducer unit generates an electrical signal based on the deformation of the vibration unit.