Lumen composite sound-insulation structure
A cavity and sound insulation technology, applied in the field of acoustics, can solve the problem of poor low-frequency sound absorption, and achieve the effect of light weight, firm structure and thin thickness
Pending Publication Date: 2018-01-19
TONGJI UNIV +1
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a cavity-tube composite sound insulation structure, which solves the problem of poor low-frequency sound absorption effect of the composite sound insulation structure in the prior art
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Embodiment 1
[0025] Such as Figure 1-6 As shown, a composite sound insulation structure of cavity and tube includes a sound insulation matrix and a sound absorption structure 2 of a medium and low frequency cavity and tube, wherein the sound absorption structure 2 of a cavity and tube of medium and low frequency is compounded on one side of the sound insulation matrix or compounded on the sound insulation matrix In the middle, the interior of the sound-absorbing structure 2 of the medium and low frequency cavity tube forms a number of sound-absorbing units 4 through the partition plate 3, and the interior of the sound-absorbing unit 4 is a cavity structure. A hole is provided on the same side of the pipe sound-absorbing structure 2 for installing a long pipe 5 installed in the cavity of the sound-absorbing unit 4 .
[0026] The middle and low frequency cavity sound absorption structure 2 is a regular or irregular geometric structure; the middle and low frequency cavity sound absorption st...
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The invention relates to a lumen composite sound-insulation structure, which comprises a sound-insulation base body and a middle-low-frequency lumen sound-absorption structure (2). The middle-low-frequency lumen sound-absorption structure (2) is compounded on one side of a sound-insulation base body or is compounded in the middle of the sound-insulation base body. The interior of the middle-low-frequency lumen sound-absorption structure (2) is provided with a plurality of sound-absorption monomers (4) through partition plates (3). The interior of each sound-absorption monomer (4) is of a cavity structure. Holes are formed on the same sides of the sound-absorption monomers (4) and the middle-low-frequency lumen sound-absorption structure (2) and are used for installing a long tube (5). Thelong tube (5) is arranged in the cavities of the sound-absorption monomers (4). According to the invention, on the premise that the lumen composite sound-insulation structure is thin in thickness andlight in weight, the low-frequency sound-insulation component is obviously improved, and the occupied space is small. The structure is firm, and the complete fiber-free sound insulation structure canbe manufactured. Different specifications can be designed according to actual requirements and according to the spectral characteristics of different noise sources.
Description
technical field [0001] The invention belongs to the technical field of acoustics, in particular to a cavity-tube composite sound insulation structure. Background technique [0002] In daily life, we can see various sound insulation structures everywhere, such as doors, windows, walls, screens, sound barriers, sound insulation covers, etc., to deal with various annoying noises. Studies have shown that sound insulation generally obeys the law of mass, that is, to have a good sound insulation effect, a sound insulation structure with a large surface density is required. Of course, we can "surpass" the law of mass through some composite structures . [0003] At present, it is common to add multilayer boards with cavities (or sound absorption and damping layers) to achieve an optimized sound insulation structure. However, in the face of low frequency noise, the effect is still obviously not good. Contents of the invention [0004] The technical problem to be solved by the pre...
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IPC IPC(8): G10K11/162G10K11/172
Inventor 罗伟王欢
Owner TONGJI UNIV