Sound absorption component capable of adjusting sound absorption frequency

Abstract

The invention relates to a sound absorption component capable of adjusting sound absorption frequency, and belongs to the technical field of building sound absorption. The sound absorption component comprises a base plate attached to a building wall surface, wherein a sound absorption panel is arranged on the outer side of the base plate; a plurality of telescopic assemblies used for adjusting thedistance between the sound absorption panel and the base plate are arranged between the sound absorption panel and the base plate; an adjusting assembly used for adjusting the lengths of the telescopic assemblies at the same time is arranged on the base plate; a telescopic surrounding edge is arranged between the sound absorption panel and the side edge of the base plate; and a closed sound absorption cavity is formed among the sound absorption panel, the base plate and the telescopic surrounding edge. The sound absorption component has the advantage of being capable of absorbing noise with different frequencies according to the actual noise condition of a tunnel; the sound absorption component is not limited to be only used in the tunnel, and the sound absorption component can be used for all buildings with certain noise interference.

Description

technical field [0001] The invention relates to the technical field of building sound absorption, in particular to a sound-absorbing component with adjustable sound-absorbing frequency. Background technique [0002] In recent years, with the development of road traffic and urban construction, expressways with large traffic volumes and high speeds have been widely constructed and put into use in cities. Urban expressways often use different combinations of underground passages, cross-river tunnels, viaducts, and ground surfaces. . What follows is that the problem of traffic noise nuisance is also becoming more and more serious. The number of complaints due to noise nuisance problems also occurs from time to time. The side walls of existing tunnels are mostly lined with cement walls, which are rigid acoustic materials, and are very easy to form sound reflections, especially for low-frequency sounds in tunnels and open sections, which tend to form longer reverberation times. ...

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Problems solved by technology

[0004] However, the above-mentioned tunnel side wall sound-absorbing structure has a disadvantage in that, because the frequency of the noise varies from high to low, the above-mentioned tunnel side wall sound-absorbing structure is fixed, and can only have a good absorption function for certain specific frequency noises. , while the noise environment in the tunnel is complex and the noise frequency is varied, the above-mentioned sound-absorbing structure of the side wall of the tunnel cannot produce a good absorption effect on the noise in the tunnel, so the noise absorption effect of the building is still poor

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