Sound insulation barrier based on acoustic metamaterial

Abstract

The invention discloses a sound insulation barrier based on acoustic metamaterial. The sound insulation barrier comprises a grating support (1) and an elastic film (2), the two side faces of the elastic film (2) are each coated with a coating, the grating support (1) comprises a first frame and a second frame, and the first frame and the second frame are each provided with a plurality of rows and columns of through openings (5) which are formed at equal intervals and are of a plate-shaped structure, the first frame is connected with the second frame through the elastic film (2), two side surfaces of the elastic film (2) are respectively adhered to the side surface of the first frame and the side surface of the second frame, a plurality of balancing weights (3) are arranged on one side surface of the elastic film (2), and each balancing weight (3) is positioned in each through hole (5) of the first frame. Compared with the prior art, the method has the advantages of low implementation difficulty, good sound insulation effect, wide application range and the like.

Description

technical field [0001] The invention relates to the technical field of low-frequency noise insulation of power equipment, in particular to a sound insulation barrier based on acoustic metamaterials. Background technique [0002] At present, the noise reduction scheme of equipment in the power industry mainly relies on some traditional acoustic materials, such as glass fiber, green felt, polyester fiber, polyurethane, melamine and other sound-absorbing materials. Sound insulation materials generally use various metal plates, dense wood, corrugated cardboard, and thick structures such as brick walls and concrete walls. Generally, a typical sound insulation structure will use a single layer of sound insulation material + sound absorption material, or a layer of sound absorption material sandwiched between two layers of sound insulation material. These two structures often balance performance and cost, and are more common in sound insulation solutions. [0003] Noise control c...

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Problems solved by technology

And in most cases, civil engineering is also a complex project with a long construction period. If the power equipment is densely stacked, it is necessary to analyze whether the civil engineering structure is reasonable. Therefore, the limitation is relatively large

In addition, although the introduction of active noise control provides a new means for the control of low-frequency noise, its stability and timeliness are difficult to guarantee, and the cost is relatively expensive, and it is also difficult to implement

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