Novel micro-perforated plate muffler with barbed triangular micro-perforation

Abstract

The invention relates to the technical field of airflow sound elimination, and discloses a novel micro-perforated plate muffler with barbed triangular micro-perforation. The micro-perforated plate muffler includes a shell, the shell internally sleeves two micro-perforated plates in a sealed mode through a sealing tape, the two micro-perforated plates are mutually symmetrical with the center line of the vertical direction of the shell as the axis of symmetry, the left side and the right side of the inner wall of the shell sleeve an air outlet pipeline and an air inlet pipeline correspondingly,and the right end of the air inlet pipeline penetrates through the shell and extends to the right side of the shell. According to the novel micro-perforated plate muffler with barbed triangular micro-perforation, a clockwise thread and a counterclockwise thread with opposite grains are formed in a distance adjusting device, a user conveniently and simultaneously adjusts and controls the distance between the two micro-perforated plates and the adjacent side of the shell according to the volume of a noise source and the audio frequency, by adjusting and controlling the depth of an inner cavity,noise and audio with different sizes are silenced conveniently, and the applicability of the novel micro-perforated panel muffler to noise reduction of different volume and different audio frequency is improved.

Description

technical field [0001] The invention relates to the technical field of airflow noise reduction, in particular to a novel micro-perforated plate muffler with barbed triangular micro-perforations. Background technique [0002] The micro-perforated plate muffler is a new type of muffler made of the sound-absorbing structure of the micro-perforated plate, without any porous sound-absorbing material. The micro-perforated plate muffler generally blocks the sound transmitted from the noise source through the micro-holes of the micro-perforated plate. At the same time, through the depth of the internal cavity, the incoming sound is resonantly silenced, so as to achieve the effect of absorbing sound energy. [0003] The existing micro-perforated plate muffler is mainly composed of a micro-perforated plate and a cavity pipe, and the micro-perforated plate and the cavity pipe are generally fixedly connected. However, the distance between the inner wall of the cavity pipe and the microh...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a novel micro-perforated plate muffler with barbed triangular micro-perforations, which improves the applicability of the new micro-perforated plate muffler for different volumes and audio levels and improves the low ductility of the micro-perforated plate for users to adjust. The advantage of solving the problems mentioned in the background technology

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