CN207397705U - A kind of compound sound insulating structure of lumen - Google Patents
A kind of compound sound insulating structure of lumen Download PDFInfo
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- CN207397705U CN207397705U CN201721130481.3U CN201721130481U CN207397705U CN 207397705 U CN207397705 U CN 207397705U CN 201721130481 U CN201721130481 U CN 201721130481U CN 207397705 U CN207397705 U CN 207397705U
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- sound
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- sound absorption
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Abstract
The utility model is related to a kind of compound sound insulating structures of lumen, including sound insulation matrix and middle low frequency lumen sound absorption structure (2), wherein described middle low frequency lumen sound absorption structure (2) is compounded in sound insulation matrix one side or is compounded among sound insulation matrix, low frequency lumen sound absorption structure (2) is internal in institute forms several sound absorption monomers (4) by demarcation strip (3), it is cavity structure inside the sound absorption monomer (4), the sound absorption monomer (4), middle low frequency lumen sound absorption structure (2) homonymy is equipped with hole, for installing long tube (5), the long tube (5) is mounted in the cavity of sound absorption monomer (4).The utility model thickness is thin, on the premise of light weight, sound insulation room amount is significantly increased, and occupied space is few, firm in structure, can be made into complete fiberless sound insulating structure, can be designed to different size for the frequency spectrum characteristic of different noise sources according to actual demand.
Description
Technical field
The utility model category technical field of acoustics, more particularly to a kind of compound sound insulating structure of lumen.
Background technology
In daily life, we can see all kinds of sound insulating structures everywhere, for example, door, window, wall, screen, sound barrier, every
Acoustic shell etc., to tackle various irritating noises.Research shows that sound insulation can substantially defer to mass law, that is, wants to have
Sound insulation effect, it is desirable to the sound insulating structure of larger surface density, certainly, we can be come " super by some composite constructions
More " mass law.
Common at present is that multi-layer board adds cavity (or sound absorption damping layer) to reach the sound insulating structure of optimization, nevertheless,
When in face of low-frequency noise, still positive effect is bad.
The content of the invention
The technical problem to be solved by the utility model is to provide a kind of compound sound insulating structures of lumen, solve in the prior art
The problem of compound sound insulating structure is bad to effect of low-frequency sound absorption.
Technical solution is used by the utility model solves its technical problem：There is provided a kind of lumen compound sound insulating structure,
Including sound insulation matrix and middle low frequency lumen sound absorption structure, wherein the middle low frequency lumen sound absorption structure is compounded in sound insulation matrix one side
Or be compounded among sound insulation matrix, several sound absorption monomers are formed by demarcation strip inside low frequency lumen sound absorption structure in institute, it is described
It is cavity structure inside sound absorption monomer, the sound absorption monomer, middle low frequency lumen sound absorption structure homonymy are equipped with hole, for installing length
Pipe, the long tube are mounted in the cavity of sound absorption monomer.
The further technical solution of the utility model is that the middle low frequency lumen sound absorption structure is regular or irregular geometry
Body structure.
The further technical solution of the utility model is that the middle low frequency lumen sound absorption structure is ductile metal or non-
Metal material.
The further technical solution of the utility model is, the middle low frequency lumen sound absorption structure by several of different sizes or
Identical sound absorption monomer split is formed.
The further technical solution of the utility model is, the sound insulation matrix for plate-compound sound insulating structure of cavity-plate or
During the compound sound insulating structure of plate-sound-absorbing porous material-plate, the middle low frequency lumen sound absorption structure is compounded in sound insulation matrix one side, and
Hole in middle low frequency lumen sound absorption structure is towards or back to sound insulation matrix.
The further technical solution of the utility model is, the middle low frequency lumen sound absorption structure be attached on sound insulation matrix or
Cavity is equipped between sound insulation matrix.
The further technical solution of the utility model is, the hole in the middle low frequency lumen sound absorption structure is back to sound insulation base
During body, middle low frequency lumen sound absorption structure back to sound insulation base side Composite Hollow thin plate or perforated plate or perforate is not sealed
Lid processing.
The further technical solution of the utility model is that the sound insulation matrix is two sound insulating structures being arranged in parallel
When, the middle low frequency lumen sound absorption structure is disposed between two sound insulating structures up and down, neighbouring two middle low frequency chambers
Cavity is equipped between pipe sound absorption structure, and the hole in middle low frequency lumen sound absorption structure is towards cavity.
The further technical solution of the utility model is sound-absorbing porous material to be filled out in the cavity, for coincidence frequency
Locate the improvement of oise insulation factor.
By sound absorption frequency formula(wherein, c is the velocity of sound, and s is orifice area, and V is cavity volume, and l is pipe
It is long) it understands, in order to realize low frequency, it is possible to reduce the area of nozzle increases cavity volume or increases the length of pipe：It is managed when reducing
During the area of mouth, sound absorber acoustic resistance can be made excessive, reduce acoustic absorptivity, such as microperforated panel will beat many in the plane
Hole, punching rate increase, and acoustic resistance becomes smaller, and can further increase acoustic resistance after being coupled due to multiple resonators, so to realize multiple
The coupling of cavity, the acoustic resistance of single structure must be under conditions of a very little, so being obtained to many resonator couplings
The sound absorption effect of wideband and high acoustic absorption coefficient can not be completed only by reducing the opening area of nozzle；Increase resonant cavity volume V
Or pipe range l realizes low frequency, since pipe range l is generally equivalent to cavity tip thickness, since cavity tip thickness is very thin, can only increase
Resonant cavity volume V, therefore, the volume of low frequency acoustic resonator is all very big in engineering at present, and the utility model need not increase resonant cavity
Volume V by the form of long tube in introducing, increases pipe range l to absorb low-frequency sound, reduces single resonator occupied area and thickness
Degree, and increase bandwidth by coupling multiple sound absorbers.
Advantageous effect
The utility model thickness is thin, on the premise of light weight, sound insulation room amount is significantly increased, and occupied space is few,
It is firm in structure, complete fiberless sound insulating structure is can be made into, can be set according to actual demand for the frequency spectrum characteristic of different noise sources
Different size is counted into, due to the design accuracy that the utility model is extremely strong, no matter (disappearing in professional domain (laboratory) or noise abatement
Sound device, sound barrier, environmental noise abatement etc.) aspect or the door core as soundproof door, the floor etc. on vehicle naval vessel, many
Field will all be widely used.
Description of the drawings
Sectional view when Fig. 1 is the hole direction sound insulation matrix in low frequency lumen sound absorption structure in the utility model.
Fig. 2 is hole in the utility model in low frequency lumen sound absorption structure back to sectional view during sound insulation matrix.
Fig. 3 is low frequency lumen sound absorption structure side cutaway opening structure schematic diagram in the utility model.
Fig. 4 is the schematic cross-sectional view of the utility model Composite Hollow thin plate.
Fig. 5 is low frequency lumen sound absorption structure schematic diagram in the utility model.
Fig. 6 is sectional view when the utility model sound insulation matrix is two sound insulating structures being arranged in parallel.
Specific embodiment
With reference to specific embodiment, the utility model is expanded on further.It is to be understood that these embodiments are merely to illustrate this
Utility model rather than limitation the scope of the utility model.In addition, it should also be understood that, reading the content of the utility model instruction
Afterwards, those skilled in the art can make various changes or modifications the utility model, and such equivalent forms equally fall within this Shen
It please the appended claims limited range.
Embodiment 1
As shown in figures 1 to 6, the compound sound insulating structure of a kind of lumen, including sound insulation matrix and middle low frequency lumen sound absorption structure 2,
Described in middle low frequency lumen sound absorption structure 2 be compounded in sound insulation matrix one side or be compounded in sound insulation matrix among, institute in low frequency lumen
Several sound absorption monomers 4 are formed by demarcation strip 3 inside sound absorption structure 2,4 inside of sound absorption monomer is cavity structure, described
Monomer 4, middle 2 homonymy of low frequency lumen sound absorption structure absorb sound equipped with hole, for installing long tube 5, the long tube 5 is mounted on sound absorption monomer
In 4 cavity.
The middle low frequency lumen sound absorption structure 2 is rule or irregular geometry structure；The middle low frequency lumen sound absorption knot
Structure 2 is ductile metal or nonmetallic materials；The middle low frequency lumen sound absorption structure 2 is by sound absorption several of different sizes or identical
4 split of monomer is formed.
As shown in Figs. 1-2, the sound insulation matrix is plate-compound sound insulating structure of cavity-plate or plate-sound-absorbing porous material-plate
During compound sound insulating structure 1, the middle low frequency lumen sound absorption structure 2 is compounded in sound insulation matrix one side, and middle low frequency lumen sound absorption knot
Hole on structure 2 towards or back to sound insulation matrix, the middle low frequency lumen sound absorption structure 2 be attached on sound insulation matrix or with the matrix that insulates against sound
Between be equipped with cavity 6, as shown in figure 4, when hole in the middle low frequency lumen sound absorption structure 2 is back to sound insulation matrix, middle low frequency chamber
Pipe sound absorption structure 2 back to sound insulation base side Composite Hollow thin plate 7 or perforated plate.
As shown in fig. 6, when the sound insulation matrix is two sound insulating structures 9 being arranged in parallel, the middle low frequency lumen sound absorption
Structure is disposed on about 2 between two sound insulating structures, and sky is equipped between neighbouring two middle low frequency lumen sound absorption structures 2
Chamber 8, and sound-absorbing porous material is filled out towards cavity 8 in the hole in middle low frequency lumen sound absorption structure 2 in the cavity 8, for the frequency that coincide
The improvement of oise insulation factor at rate.
In actual use：
Low frequency lumen sound absorption structure 2 can be by the occasion used by materials such as metal, ceramics, gypsum, plastics in the utility model
Material is made, and middle low frequency lumen sound absorption structure 2 then is compounded in sound insulation matrix one side or is compounded among sound insulation matrix.
If sound insulation matrix is plate-compound sound insulating structure of cavity-plate or the compound sound insulating structure 1 of plate-sound-absorbing porous material-plate
When, as shown in Figure 1 and Figure 2, middle low frequency lumen sound absorption structure 2 can be close on sound insulation matrix or leave sky between sound insulation matrix
Chamber 6, middle low frequency lumen sound absorption structure 2 leave cavity 6 with sound insulation matrix, then sound insulation property can higher；If middle low frequency lumen sound absorption
When hole in structure 2 is back to sound insulation matrix, it is equipped with and 5 corresponding hole of long tube, therefore this reality by middle low frequency lumen sound absorption structure 2
With can leave hole on new main structure panel, but hole can there are many processing mode, such as：A kind of mode is at hole
Filling sucting sound material, such as mineral wool, melamine cotton, and in the attached PVF films in surface or perforated plate；Another way be as shown in figure 4,
In thin plate 7 or perforated plate of the monomer 2 back to the side Composite Hollow (or filling out sound-absorbing material) of sound insulation base 1 that absorb sound.
If the matrix that insulates against sound is two sound insulating structures 9 being arranged in parallel, as shown in fig. 6, acoustic wave transmission crosses the sound insulation of the first face
After structure, transmitted through the second face sound insulating structure, a part can stay in cavity 8 part, and low frequency lumen is inhaled in the utility model
Acoustic form 2 and porous material help to absorb the acoustic energy handed down to posterity and be multicast in cavity 8, so as to improve integrally-built oise insulation factor.
Claims (9)
1. a kind of compound sound insulating structure of lumen, including sound insulation matrix and middle low frequency lumen sound absorption structure (2), it is characterised in that：Institute
It states low frequency lumen sound absorption structure (2) to be compounded in sound insulation matrix one side or be compounded among sound insulation matrix, low frequency lumen is inhaled in institute
Acoustic form (2) inside forms several sound absorption monomers (4) by demarcation strip (3), is cavity structure inside the sound absorption monomer (4),
The sound absorption monomer (4), middle low frequency lumen sound absorption structure (2) homonymy are equipped with hole, for installing long tube (5), the long tube (5)
In the cavity of sound absorption monomer (4).
2. a kind of compound sound insulating structure of lumen according to claim 1, it is characterised in that：The middle low frequency lumen sound absorption knot
Structure (2) is rule or irregular geometry structure.
3. a kind of compound sound insulating structure of lumen according to claim 1, it is characterised in that：The middle low frequency lumen sound absorption knot
Structure (2) is ductile metal or nonmetallic materials.
4. a kind of compound sound insulating structure of lumen according to claim 1, it is characterised in that：The middle low frequency lumen sound absorption knot
Structure (2) is formed by sound absorption monomer (4) split several of different sizes or identical.
5. a kind of compound sound insulating structure of lumen according to claim 1, it is characterised in that：The sound insulation matrix is plate-sky
When the compound sound insulating structure of chamber-plate or plate-compound sound insulating structure of sound-absorbing porous material-plate (1), the middle low frequency lumen sound absorption structure
(2) it is compounded in sound insulation matrix one side, and the hole on middle low frequency lumen sound absorption structure (2) is towards or back to sound insulation matrix.
6. a kind of compound sound insulating structure of lumen according to claim 5, it is characterised in that：The middle low frequency lumen sound absorption knot
Structure (2) is attached on sound insulation matrix or is equipped with cavity (6) between sound insulation matrix.
7. a kind of compound sound insulating structure of lumen according to claim 5, it is characterised in that：The middle low frequency lumen sound absorption knot
When hole on structure (2) is back to sound insulation matrix, middle low frequency lumen sound absorption structure (2) is back to the side Composite Hollow thin plate of sound insulation base
(7) or perforated plate or capping processing is not done to perforate.
8. a kind of compound sound insulating structure of lumen according to claim 1, it is characterised in that：The sound insulation matrix is flat for two
Row set sound insulating structure (9) when, the middle low frequency lumen sound absorption structure (2) up and down be disposed on two sound insulating structures it
Between, cavity (8) is equipped between neighbouring two middle low frequency lumen sound absorption structures (2), and on middle low frequency lumen sound absorption structure (2)
Hole towards cavity (8).
9. a kind of compound sound insulating structure of lumen according to claim 8, it is characterised in that：It is filled out in the cavity (8) porous
Sound-absorbing material, for the improvement of oise insulation factor at coincidence frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721130481.3U CN207397705U (en) | 2017-09-05 | 2017-09-05 | A kind of compound sound insulating structure of lumen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721130481.3U CN207397705U (en) | 2017-09-05 | 2017-09-05 | A kind of compound sound insulating structure of lumen |
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| Publication Number | Publication Date |
|---|---|
| CN207397705U true CN207397705U (en) | 2018-05-22 |
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| CN201721130481.3U Active CN207397705U (en) | 2017-09-05 | 2017-09-05 | A kind of compound sound insulating structure of lumen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107610688A (en) * | 2017-09-05 | 2018-01-19 | 上海声望声学科技股份有限公司 | A kind of compound sound insulating structure of lumen |
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2017
- 2017-09-05 CN CN201721130481.3U patent/CN207397705U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107610688A (en) * | 2017-09-05 | 2018-01-19 | 上海声望声学科技股份有限公司 | A kind of compound sound insulating structure of lumen |
| CN107610688B (en) * | 2017-09-05 | 2024-04-26 | 同济大学 | Cavity tube composite sound insulation structure |
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