Coupling resonance sound-absorbing device by utilizing combination of lumen coupling and tube bundle perforation plate

Abstract

The invention relates to a coupling resonance sound-absorbing device by utilizing the combination of a lumen coupling and a tube bundle perforation plate, comprising a closed cavity formed by a perforation plate with a hole, a backboard and a side plate. In the cavity, a tube bundle is inserted into and connected to the hole of the perforation plate, nodes are distributed on the tube bundle, and at least one collateral branch tube bundle is communicated with the nodes; nodes can be distributed on both a main tube bundle and the collateral branch tube bundle to be communicated with the collateral branch tube bundle, and all the tube bundles and the nodes form a dendriform structure; and a tube is not linked to the other end of each node to be opened or closed, and is directly arranged in the closed cavity. By linking the tube bundles into the dendriform structure, the invention fully utilizes the principle of lumen coupling resonance sound absorption and the modulation characteristics of the tube bundle structure to a resonance absorption peak and a sound absorption frequency band, increases the acoustic resistance, the sound quality and the sound absorption coefficient, promotes the absorption peak to move towards high frequency at the same time, and is beneficial to enhancing the high-frequency sound absorption effect and widening the sound absorption frequency band.

Description

technical field [0001] The invention relates to a resonant sound-absorbing device, in particular to a coupled resonant sound-absorbing device which combines a resonant sound-absorbing structure of a tube bundle perforated plate and a tree-like multi-branch structure. Background technique [0002] There are many kinds of sound-absorbing materials and sound-absorbing structures used in noise control engineering. According to their sound-absorbing principles, they can be roughly divided into porous sound-absorbing materials, thin-plate resonance Perforated panel sound-absorbing structure. [0003] Although the resonant sound-absorbing structure of the perforated plate and the sound-absorbing structure of the micro-perforated plate are more porous and sound-absorbing materials have many advantages in terms of sound absorption characteristics, flow resistance, moisture resistance, corrosion resistance, and sanitation, they still cannot meet some noise control requirements. The a...

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Problems solved by technology

[0005] The purpose of the present invention is to: overcome the defect of insufficient low-frequency sound absorption in the current noise control method; thereby provide a coupling resonance sound absorption device that utilizes tube cavity coupling and tube bundle perforated plates. By linking tube bundles into a tree structure, the side branches The role of the tube bundle increases the volume of the tube bundle in the cavity, fully consumes the sound energy and uses the principle of tube coupling resonance sound absorption, and the modulation characteristics of the tree-like multi-branch structure of the tube bundle on the resonance absorption peak and sound absorption frequency band to increase the acoustic resistance Harmony quality, strengthen sound absorption, modulate resonance absorption peak and sound absorption frequency band, thereby increasing sound absorption coefficient, enhancing effective absorption of middle and low frequency noise, improving high frequency sound absorption effect at the same time, broadening sound absorption frequency band, and achieving reduction The resonant cavity of the resonant sound-absorbing device has a deep cavity size and maintains a high broadband sound-absorbing performance

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