A modular multi-layer composite acoustic voltage metamaterial

Abstract

The invention discloses a module type multilayer composite acoustic-voltaic meta-material comprising a sheet-shaped acoustic-voltaic module. The acoustic-voltaic module comprises a base layer, a cavity layer and a neck layer which are sheet-shaped and closely arranged in turn. The base layer comprises a substrate base material and acoustic-electric energy converters which are arranged on the substrate base material. The cavity layer comprises an intermediate layer base material and cavity holes which penetrate through the intermediate layer base material. The neck layer comprises a neck layer base material and neck holes which penetrate through the neck layer base material. The acoustic-electric energy converters, the cavity holes and the neck holes are corresponding in arrangement in a one-to-one way. An independent Helmholtz resonator hole is formed by one corresponding group of the acoustic-electric energy converter, the cavity hole and the neck hole. All the Helmholtz resonator holes are divided into N structural types according to the shape and size of the Helmholtz resonator holes. The module type multilayer composite acoustic-voltaic meta-material has advantages of being miniaturized, modularized, integratable and easy to process so that the module type multilayer composite acoustic-voltaic meta-material is the base material capable of realizing acoustic pressure amplification of N frequencies and synchronizing acoustic-electric conversation of multiple frequency acoustic waves under the condition of Helmholtz resonance.

Description

technical field [0001] The invention relates to a modular multi-layer composite acoustic volt metamaterial. Background technique [0002] Metamaterials are a class of new materials with special light, sound, heat, electricity, magnetism, chemical and biological functions, and are important basic materials in high-tech fields such as energy, information, and biotechnology. A multi-layer composite acoustic metamaterial is an acoustic metamaterial with acoustic-electric conversion function developed from the miniaturization, modularization, and integration of acoustic power generation systems, which can be widely used in environmental noise elimination And the use of sound energy (such as the elimination and utilization of noise in airports, water / thermal power plants, etc.), thermoacoustic power generation, power supply for self-powered systems, etc. The patent application with the international publication number WO2007 / 064602 discloses a sound power generation device that u...

AI Technical Summary

Problems solved by technology

Considering that it is difficult to amplify the sound pressure of multiple arbitrary frequency sound waves by constructing multiple Helmholtz resonator holes of a single structure type, this weakens the acoustic-electric transducer in the hole during the acoustic-electric conversion process of multi-frequency sound source sound waves. Sound-to-electricity conversion function

Images