Sound-absorbing device utilizing tube cavity coupled resonance and interbank coupled resonance

Abstract

The invention relates to a sound-absorbing device utilizing tube cavity coupled resonance and interbank coupled resonance, and a closed cavity is formed by a perforated plate with a hole, a back plateand a side plate; a main tube bank is inserted in the hole on the perforated plate in the cavity and communicated, nodes are distributed on the main tube bank, any two nodes are connected through atleast one chain tube bank, and all the tube banks and the nodes form a reticular structure; the other end where the main tube bank is not connected to the perforated plate is open or closed and is directly placed in the closed cavity. The invention enables the tube tanks to be connected into a reticular structure, fully utilizes the sound-absorbing principle of tube cavity coupled resonance of thechain tube bank and the main tube bank and interbank coupled resonance as well as the modulation characteristics of the tube bank structure to the resonance-absorption peak and the sound-absorbing frequency band, increases the acoustic resistance and the acoustic mass, promotes the absorption peak to move towards the high frequency, is beneficial to improving the high-frequency sound-absorbing effect, simultaneously widens the sound-absorbing frequency band and enhances the effective absorption of low and medium frequency noise.

Description

technical field [0001] The present invention relates to a resonant sound-absorbing device, in particular to a resonant sound-absorbing device with a tube bundle perforated plate and a reticulated multi-ring structure, which has a reticulated structure and uses tube cavity coupling resonance and tube bundle coupling resonance. sound device. 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...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to: overcome the defect of insufficient low-frequency sound absorption in the above-mentioned method for noise control at present; thereby provide a sound-absorbing device that utilizes tube lumen coupling resonance and tube-bundle coupling resonance by linking tube bundles into a network structure. Due to the function of the chain tube bundle, the device increases the volume of the tube bundle in the cavity, fully consumes the sound energy and utilizes the coupling resonance sound absorption principle between the tube cavity and the tube bundle, as well as the modulation characteristics of the tube bundle structure on the resonance absorption peak and the sound absorption frequency band, increasing Acoustic resistance and sound quality, strengthen sound absorption, modulate resonance absorption peak and sound absorption frequency band, and its sound absorption frequency band is wider than traditional perforated plate resonant sound absorption structure and linear tube bundle perforated plate resonant sound absorption structure, thereby increasing the sound absorption coefficient , enhance the effective absorption of middle and low frequency noise, improve the high frequency sound absorption effect at the same time, broaden the sound absorption frequency band, and reduce the size of the resonant cavity depth of the perforated plate sound absorption structure and the tube bundle perforated plate resonant sound absorption device and keep it relatively The purpose of high broadband sound absorption performance

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