Sound vortex local device based on metasurface, application and system

By setting dielectric materials with different refractive indexes in the supercage to form a phase gradient, a local device for acoustic vortex based on metasurface is designed, which solves the stability and local effect of traditional sound absorbing devices in complex noise environments. Problem, efficient noise control is achieved.

CN119479602APending Publication Date: 2025-02-18SUZHOU UNIV
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Patent Information

Application Number
CN202411502958.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-25
Publication Date
2025-02-18

AI Technical Summary

Technical Problem

Traditional sound-absorbing devices face stability problems when dealing with complex noise environments, especially under different climatic conditions, and it is difficult to effectively vortex the sound field in the local area, resulting in increased difficulty in noise control.

Method used

A local device for acoustic vortex based on metasurface is designed to form a phase gradient by setting dielectric materials with different refractive indices in the supercage, so that the sound waves are localized in the supercage, thereby realizing the retention of the sound source position. Good and effective local effects.

Benefits of technology

It achieves stable sound absorption performance under different climatic conditions, and can effectively vortex the sound field in local areas, improving the effect and flexibility of noise control.

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Abstract

The invention provides an acoustic vortex local device based on a metasurface, application and a system. The device comprises a super-structure cage, and the super-structure cage comprises a plurality of connected super unit cell monomers; each super unit cell monomer comprises a plurality of unit structures, every two unit structures are connected, and dielectric materials with different refractive indexes are arranged in the unit structures to form a phase gradient, so that sound waves emitted by a sound source located at any position of the center offset distance of the super-structure cage are localized in the super-structure cage. The superstructure cage provided by the invention has an effective localization capability on sound waves under different conditions, provides new possibilities for research and application in the acoustic field, can be used for designing more efficient acoustic devices and systems, realizes accurate control and utilization of sound waves, has potential application values in the aspects of acoustic engineering, noise control and the like, and has wide application prospects. And the innovativeness of the structural design brings a new thought and method for the development of the acoustic metamaterial.
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