Acoustic Wave Cloaking Meta-Material Time Dependency
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Solution Overview
Problem
Current meta-material technologies are limited in their ability to cloak acoustic waves with generalized time dependency, particularly in preventing acoustic waves from propagating to specific regions or outside areas, and do not effectively address geometrical shape variations or frequency and velocity factors.
Innovation Solution
A method and device utilizing a meta-material that transforms an acoustic propagation mathematical model into an acoustic wave cloaking mathematical model based on a correlation with electromagnetic wave models, incorporating time variables and Maxwell's equations-based relativistic coordinate-space transformation, to block acoustic waves by surrounding the target region with meta-materials having specific characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electromagnetic wave cloaking theories are applied to acoustic waves, then frequency-specific cloaking can be achieved, but the solution is limited to finite frequencies and cannot handle generalized time dependency
Solution Approach 1:
The patent transforms the acoustic propagation mathematical model into an acoustic wave cloaking mathematical model by changing the parameters and structure of the equations. This involves incorporating time variables and applying coordinate transformation techniques that allow the model to handle generalized time dependency rather than being restricted to finite frequencies. The transformation modifies the fundamental parameters of the mathematical model to achieve broader applicability.
2Reliability
If meta-material is designed for specific frequency ranges, then cloaking effectiveness is improved for those frequencies, but the device cannot cloak acoustic waves with different frequencies or time dependencies
Solution Approach 1:
The patent develops a universal acoustic wave cloaking mathematical model that can handle various types of acoustic waves regardless of their frequency or time dependency characteristics. The transformed model incorporates general time variables and coordinate transformations that make the cloaking device applicable to a broad spectrum of acoustic wave conditions, not limited to specific frequency ranges. This multi-functional approach allows the same mathematical framework to address diverse cloaking scenarios.
3Adaptability or versatility
If coordinate transformation is applied to achieve geometric flexibility in cloaking, then regions with various geometrical shapes can be cloaked, but the mathematical model complexity increases significantly
Solution Approach 1:
The patent applies coordinate transformation techniques that introduce dimensional changes to the mathematical model, enabling the cloaking of regions with various geometrical shapes. By transforming the spatial coordinates and incorporating time variables into the mathematical framework, the model can accommodate complex geometries while maintaining a systematic approach to solving the cloaking problem.
4Adaptability or versatility
If acoustic propagation model is transformed to include time variables, then generalized time dependency is achieved, but the transformation and calculation process becomes more complex
Solution Approach 1:
The patent transforms the acoustic propagation mathematical model by changing its parameters to include general time variables. This parameter change enables the model to handle generalized time dependency, allowing the cloaking device to effectively manage acoustic waves with varying time characteristics. The transformation modifies the fundamental structure of the mathematical model to incorporate temporal dimensions while maintaining solvability.
Data Source
AI summary
Disclosed herein are a method and device for cloaking an acoustic wave. A method for cloaking an acoustic wave according to an embodiment of the present invention includes: transforming an acoustic propagation mathematical model, predetermined for the propagation of an acoustic wave, into an acoustic wave cloaking mathematical model corresponding to an electromagnetic wave mathematical model predetermined for an electromagnetic wave and including a time variable for time dependency, based on a correlation between the acoustic propagation mathematical model and the electromagnetic wave mathematical model; obtaining a target characteristic of a meta-material by using the acoustic wave cloaking mathematical model; and blocking a region including a target object, from an acoustic wave by disposing the meta-material having the obtained target characteristic to surround the region.