Metamaterial Acoustic Barrier Using Vortex Diodes for 3D Integration
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Solution Overview
Problem
Existing acoustic barrier solutions are unable to be integrated into three-dimensional components effectively, limiting their ability to reduce noise using appropriate materials.
Innovation Solution
The use of metamaterials with vortex diodes, which create circulation elements arranged in various arrays to form differently shaped elements for sound attenuation, redirecting and dissipating acoustic energy through vorticity-induced features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If dampening materials such as foam, rubber, and vinyl are used to limit acoustic noise, then sound attenuation is achieved, but the ability to integrate into three-dimensional components is limited
Solution Approach 1:
The patent employs porous foam materials with specific cell structures to create acoustic barriers that can be integrated into three-dimensional components. The porous structure allows sound waves to enter and be attenuated through viscous losses and thermal conduction within the material's cellular architecture, while maintaining compatibility with 3D component geometries
Solution Approach 2:
The invention combines multiple materials including foam, rubber, and vinyl in composite structures to achieve both effective sound attenuation and adaptability to three-dimensional components. These composite materials provide tailored acoustic properties while enabling integration into complex geometries through their inherent flexibility and formability
2Object-affected harmful factors
If metal is shaped to include sets of tubes, channels, and holes for noise reduction, then sound attenuation is achieved, but integration into three-dimensional components is limited
Solution Approach 1:
The patent utilizes porous foam materials that inherently provide the necessary channels and pathways for sound attenuation without requiring separate metal tubes or channels. The porous structure itself creates the flow paths needed for acoustic energy dissipation, simplifying manufacturing and enabling easier integration into three-dimensional components
Solution Approach 2:
The invention employs composite material systems that combine the acoustic benefits of structured channels with the manufacturing advantages of molded foam and polymer materials, eliminating the need for separate metal component assembly while achieving effective sound attenuation in integrated 3D structures
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
These metamaterials effectively attenuate sound by modifying the index of refraction, reducing noise levels within enclosures and preventing sound detection, while allowing ventilation and wind to pass through with minimal resistance.
Implementation Method 1
The use of metamaterials with vortex diodes, which create circulation elements arranged in various arrays to form differently shaped elements for sound attenuation, redirecting and dissipating acoustic energy through vorticity-induced features
Implementation Method 2
These metamaterials effectively attenuate sound by modifying the index of refraction, reducing noise levels within enclosures and preventing sound detection
Data Source
AI summary
Metamaterials that may reduce or modify the spectrum of acoustic energy or power (and/or other types of fluid energy or power) via an array of circulation elements, such as vortex diodes are described. Circulation elements may be arranged in various types of arrays (e.g., serial, parallel, etc.) that may be able to form various differently shaped metamaterial elements (e.g., sheets, boxes, tubes, etc.) appropriate for various different applications.