Combined self-regulation sound barrier

Abstract

The invention discloses a combined self-regulation sound barrier and relates to the technical field of treatment on sound pollution. The combined self-regulation sound barrier comprises a sound barrier body, and a plurality of cavities are formed in the sound barrier body. The combined self-regulation sound barrier further comprises a control unit and a plurality of sound absorption units made of porous materials. The sound absorption units are arranged in the cavities and fixed to the side walls of the cavities. Each sound absorption unit and the side wall of the corresponding cavity are provided with electromagnets corresponding to each other. The control unit comprises sound sensors and a controller, and the sound sensors and the electromagnets are all connected with the controller. By controlling stretching or compression of the sound absorption units, the porous structure inside each sound absorption unit is changed, the absorption capacity for sounds of various frequency bands is changed, the combined self-regulation sound barrier can absorb sounds in a more targeted mode, and the noise absorption capacity of the combined self-regulation sound barrier is improved.

Description

technical field [0001] The invention relates to the technical field of sound pollution control, in particular to a combined automatic adjustment sound barrier. Background technique [0002] The sound barrier is a wall-type structure set up on the side of railways and highways to reduce the impact of traffic noise on nearby residents. It is generally used for sound insulation and noise reduction on both sides of highways, high-speed railways, and subway tracks; The installation between the sound source and the receiver allows the sound waves to propagate with a significant attenuation, thereby reducing the noise in the area where the receiver is located. The existing sound barrier structure is generally filled with sound-absorbing cotton in the barrier shell; when the sound impacts the sound barrier, the outer surface of the barrier shell will reflect the sound to attenuate the sound; on the other hand, when the sound penetrates the barrier shell When the sound hits the soun...

AI Technical Summary

Problems solved by technology

Because the noise is composed of various sounds, that is, sounds with various frequencies and various intensities in the noise, especially beside the road, because there are many types of sound sources on the road, the composition of the noise is also relatively complex and constantly changing; therefore When the sound changes and the sound of a certain frequency band suddenly increases, the sound barrier may not be able to absorb the sound of this frequency band well and efficiently

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