Acoustic panel with unit structure

Abstract

The invention relates to an acoustic panel with a unit structure. The acoustic panel comprises an ultramicropore acoustic panel, a side edge plate and an acoustic back plate. The edge part of the ultramicropore acoustic panel is connected with the acoustic back plate through the side edge plate to form a sound absorption resonant cavity. The acoustic panel is characterized in that an sound absorption metal film parallel to the sound absorption resonant cavity or an sound absorption metal film with nano microspheres is arranged in the sound absorption resonant cavity. The acoustic panel not only has the advantages of wide sound absorption bandwidth and good noise reduction effects, but also has the advantages of simple structure and simplicity, convenience and reliability in process manufacture and assembly use. The acoustic panel is suitable for the occasions in various buildings where ceiling hanging and wall decoration are required, and particularly suitable for the occasions where high sound absorption is required.

Description

technical field [0001] The invention relates to a sound-absorbing and noise-reducing equipment, in particular to a sound-absorbing panel with a unit structure used in building interiors where the reverberation sound field needs to be eliminated. Background technique [0002] In the construction of modern cities, the requirements for the indoor acoustic environment of large and medium-sized public buildings are getting higher and higher, especially for the interior decoration materials of large and medium-sized public buildings, they need to have both beautiful decorative functions and excellent acoustics Features. And the interior decoration materials of traditional large and medium-sized public buildings generally use aluminum bar-shaped, aluminum square or aluminum hanging sheet-shaped ceilings and wall panels with apertures of Φ1-3 mm. Although these interior decoration materials have It has a certain sound absorption performance, but its actual sound absorption effect i...

AI Technical Summary

Problems solved by technology

Although the ultra-microporous sound-absorbing body is conducive to improving the sound-absorbing performance, it still has the following disadvantages: Although the structure of the internal cavity is changed with the sound-absorbing slant or V-shaped sound-absorbing wedge, the gradual cavity formed by the slant To a large extent, the width of the sound absorption frequency band is wider, but due to the reduction of the total sound absorption area of ​​each frequency band, the sound absorption coefficient of each frequency band has an overall downward trend. Therefore, the average sound absorption coefficient does not change. not tall

Although the sound-absorbing flap has good acoustic performance, it still has the following shortcomings: First, affected by the size of the product, it has a good sound-absorbing effect in the middle and high frequencies, but the sound-absorbing effect is relatively poor in the low-frequency band ; Second, the sound absorption performance can only have a good sound absorption effect in this specific range, and the sound absorption effect in other frequency bands is poor, and the frequency bandwidth is relatively narrow

Although the sound-absorbing panel can use the sealed cavity sound-absorbing back plate to resonate and absorb sound without adding any fiber materials, it can achieve a better sound-absorbing effect, but it still has the following shortcomings: First, there are still The single-layer sound-absorbing panel has a relatively narrow sound-absorbing frequency band, and it cannot achieve a good sound-absorbing effect in each frequency range within a wide frequency band; Sound absorption, but from the analysis of the overall installation structure compared with the principle of thin plate resonance sound absorption, it is found that the size behind the airtight cavity is relatively large, and the effect of sound pressure energy is difficult to cause resonance of the thin plate, and the resonance sound absorption effect of the thin plate will be relatively large. limited

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