CN209249069U - Sound absorber - Google Patents
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- CN209249069U CN209249069U CN201821821762.8U CN201821821762U CN209249069U CN 209249069 U CN209249069 U CN 209249069U CN 201821821762 U CN201821821762 U CN 201821821762U CN 209249069 U CN209249069 U CN 209249069U
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Abstract
The utility model belongs to noise reduction technology field, discloses sound absorber, comprising: sound absorption cell cube, the sound absorption cell cube include the first sound absorber and the second sound absorber；First sound absorber includes grid, and is covered in the top plate of grids top, opens up hole on the top plate；Second sound absorber includes the coaming plate connecting respectively with the surrounding side of grating base, and the bottom plate connecting with coaming plate bottom.The resonant frequency of second resonant cavity and the first resonant cavity described in the utility model embodiment is different, can carry out sqouynd absorption lowering noise to the incident acoustic wave of different frequency, widen sound sucting band；And the grid and top plate composite structure bending resistance and compression strength it is big, mechanical property is good；While sound absorption cell cube described in the utility model embodiment improves the mechanical properties such as bending resistance, resistance to compression, the sqouynd absorption lowering noise function of low-frequency sound wave is also increased.
Description
Technical field
The utility model belongs to noise reduction technology field, and in particular to sound absorber.
Background technique
Human body be for the tolerance level of sound it is conditional, people allow in the environment of different sound pressure levels to duration be also
It is different.On aerospace, high speed carrying platform, noise usually influences whether the health of passenger.Such as aircraft noise one
As can be divided into internal noise and external noise two major classes, external noise generally refers to engine noise and turbulent boundary layer is made an uproar
Sound, and internal noise then mainly has ring control noise and noise of equipment.The mankind to the sensitivity of noise not only with the size of noise
It is related, also with noise occur frequency it is related, compared with the ambient noise of aircraft, people be easier by voice, door slam,
The influence of this human-made noise of the sound of snoring, crying.
Therefore, noise control is not simply continuous noise reduction, but controls noise profile, and is made one in relative comfort
Environment.How noise reduction and control noise profile, be a sciences problems in field of noise control.
Utility model content
In order to solve the above technical problems, sound absorber provided by the utility model, can effectively reduce low-frequency noise, and can be real
Efficiently sound absorption is realized in existing broad frequency range.
In order to achieve the above purposes, the technical solution adopted by the utility model is: sound absorber, comprising: sound absorption cell cube, institute
Stating sound absorption cell cube includes the first sound absorber and the second sound absorber；First sound absorber includes grid, and covering
In opening up hole on the top plate of grids top, the top plate；Second sound absorber includes, respectively with the border of grating base
The coaming plate of connection, and the bottom plate being connect with coaming plate bottom.
Preferably, described hole is several.
Preferably, sound-absorbing porous material is filled in the grid.
Preferably, sound-absorbing porous material is filled between the coaming plate and bottom plate.
Preferably, the grid is several；First partition is set between adjacent grid.
Preferably, second partition is set between the grid and coaming plate；The second partition respectively with the grid and enclose
Plate connection.
Preferably, the coaming plate is several, and third partition is arranged between adjacent coaming plate.
Preferably, the sound absorption cell cube is several, is connected between several sound absorption cell cubes by bonding mode.
The utility model compared with prior art, has the advantages that grid described in the utility model embodiment
The first resonant cavity is formed with top plate；The second resonant cavity is formed between the coaming plate and bottom plate；First resonant cavity and second is total to
The resonant frequency of vibration chamber is different, can carry out sqouynd absorption lowering noise to the incident acoustic wave of different frequency, widen sound sucting band；And the grid
Composite structure bending resistance and compression strength with top plate is big, and mechanical property is good；Absorb sound cell cube described in the utility model embodiment
While improving the mechanical properties such as bending resistance, resistance to compression, the sound absorption of low-frequency sound wave is also broadened, decrease of noise functions is improved.
On the one hand the utility model embodiment is improved to the efficient of low-frequency sound wave by the punching rate of the adjusting top plate
It absorbs, on the other hand sound absorption effect of adjustable first resonant cavity to the low-frequency sound wave of different frequency；By adjusting institute
Grid height, aperture or the width equidimension for stating grid, can further increase the acoustic resistance of first resonant cavity, promote to resonate
Absorption peak shifts to low frequency, strengthens the sound absorbing performance of sound absorption cell cube described in the utility model；In grid by the grid
Coupling resonance sound-absorbing combines the cell structure of different low frequency absorptions, may be implemented to the efficient of broadband low frequency incident acoustic wave
It absorbs.
The utility model embodiment, can also be different according to the angle of incident acoustic wave, by the grid for adjusting the grid
Highly, aperture or width dimensions size adjust the acoustic damping of the first resonant cavity, strengthen the sound absorption for the cell cube that absorbs sound described in oblique incidence
Performance.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new
Some embodiments of type for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is one of the structural schematic diagram for the sound absorption cell cube that the utility model embodiment provides；
Fig. 2 is the schematic top plan view for the sound absorption cell cube that the utility model embodiment provides；
Fig. 3 is the A of Fig. 2 to schematic cross-sectional view；
Fig. 4 is the B of Fig. 2 to schematic cross-sectional view；
Fig. 5 is the second structural representation for the sound absorption cell cube that the utility model embodiment provides；
Fig. 6 is the schematic perspective view for the grid that the utility model embodiment provides；
Fig. 7 is the structural schematic diagram for the sound absorber that the utility model embodiment provides；
Fig. 8 is the acoustic absorptivity schematic diagram of sound absorber described in embodiment 7；
Fig. 9 is the acoustic absorptivity schematic diagram of sound absorber described in embodiment 8；
Figure 10 is the acoustic absorptivity schematic diagram of sound absorber described in embodiment 9.
Wherein, each appended drawing reference in figure:
100- sound absorption cell cube；The first sound absorber of 1-；11- top plate；111- hole；12- grid；13 first resonant cavities；
The second sound absorber of 2-；21- coaming plate；The second resonant cavity of 22-；23- bottom plate；31- first partition；32- second partition；33- third
Partition；The 4th partition of 331-；The 5th partition of 332-.
Specific embodiment
In order to which technical problem to be solved in the utility model, technical solution and beneficial effect is more clearly understood, with
Lower combination accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific reality described herein
It applies example to be only used to explain the utility model, is not used to limit the utility model.
In the description of the present invention, it should be understood that term " length ", " width ", "upper", "lower", " preceding ",
The orientation or positional relationship of the instructions such as " rear ", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached
Orientation or positional relationship shown in figure, is merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion
Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this
The limitation of utility model.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention,
More than, unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
Also referring to Fig. 1 to Figure 10, now to sound absorber provided by the utility model, it is illustrated.
Sound absorber described in the utility model, including sound absorption cell cube 100, the sound absorption cell cube 100 include first
Sound absorber 1 and the second sound absorber 2；First sound absorber 1 includes grid 12, and is covered in the top at 12 top of grid
Plate 11 opens up hole 111 on the top plate 11；Second sound absorber 2 includes, respectively with the week of the bottom of 12 bottom of grid
Enclose the coaming plate 21 of connection, and the bottom plate 23 connecting with 21 bottom of coaming plate.
The construction profile of grid described in the utility model can be polygon, round or ellipse.
Refering to fig. 1 to Fig. 4, as a kind of embodiment of the utility model, the grid 12 forms first with top plate 11
Resonant cavity 13；The grid 12 can be set with top plate 11 to be integrated or is connect by bonding mode；The coaming plate 21
The second resonant cavity 22 is formed between bottom plate 23；The coaming plate 21 and bottom plate 23, which can be set, is integrated or passes through bonding
Mode connects；When sound wave incident is to the top plate 11, incident acoustic wave enters the first resonant cavity 13 by hole 111, and first is total
Air in vibration chamber 13 moves back and forth under the action of low frequency incident acoustic wave, generates vibration, and friction and damping action make a part
Sound can be converted into thermal energy and consume, and coupling resonance sound-absorbing is formed between the grid of grid 12, further enhance sound absorption.
The remaining low frequency incident acoustic wave not being consumed enters the second resonant cavity 22, and the air in the second resonant cavity 22 is in low frequency incidence
It being moved back and forth under the action of sound wave, generates vibration, friction and damping action enable a part of sound to be converted into thermal energy and consume, and second
Resonant cavity 22 is different with the resonant frequency of the first resonant cavity 13, can carry out sqouynd absorption lowering noise to the incident acoustic wave of different frequency, widen
Sound sucting band；And the grid 12 and top plate 11 composite structure bending resistance and compression strength it is big, mechanical property is good；The utility model
While sound absorption cell cube 100 described in embodiment improves the mechanical properties such as bending resistance, resistance to compression, the all-bottom sound of broadband is also increased
The sound absorption of wave, improves decrease of noise functions.
Preferably, described hole 111 is several.
Described hole 111 can be uniformly or non-uniformly to arrange；Adjust the quantity of hole 111, the adjustable top plate 11
Punching rate, and then adjust the first resonant cavity 13 resonant frequency, can absorb sound to the incident acoustic wave of different frequency.
Preferably, the shape of described hole 111 is round, ellipse or polygon；But it is not limited to above-mentioned shape.
As a kind of embodiment of the utility model, the top plate 11 is with a thickness of 0.5~1mm, length or width
70~200mm；The aperture of described hole 111 or width are 3~7mm；Punching rate is 1%~5%.
Preferably, the mesh shape of the grid 12 is round, ellipse or polygon；The mesh shape of the grid 12
The resonant frequency of difference, the first resonant cavity 13 is different, can absorb sound to the incident acoustic wave of different frequency.
Preferably, the size of mesh opening of the grid 12 is different, and size of mesh opening includes thickness, height, aperture or width dimensions.
As a kind of embodiment of the utility model, the grid 12 with a thickness of 0.5~1mm, highly for 20~
90mm；The length or width of the grid 12 is 70~200mm；The aperture of the grid of the grid 12 or width are 3~7mm.
As a kind of embodiment of the utility model, shape, aperture or the width of described hole 111 and the grid 12
Mesh shape, aperture or equivalent width；Quantity, aperture or the width of described hole 111 is adjusted in the utility model embodiment,
And mesh shape, aperture or the width of the grid 12, and then adjust the punching rate of the top plate 11.
On the one hand the utility model embodiment improves the height to low-frequency sound wave by the punching rate of the adjusting top plate 11
Effect absorbs, on the other hand sound absorption effect of adjustable first resonant cavity 13 to different frequency low-frequency sound wave；Pass through adjusting
Height, aperture or the width equidimension of 12 grid of grid can further increase the acoustic resistance of first resonant cavity 13, promote
So that resonance absorbing peak is shifted to low frequency, strengthens the sound absorbing performance of sound absorption cell cube 100 described in the utility model；Pass through the grid 12
Grid in coupling resonance sound-absorbing, combine the cell structures of different low frequency absorptions, may be implemented incident to broadband low frequency
The efficient absorption of sound wave.The utility model embodiment, can also be different according to the angle of incident acoustic wave, by adjusting the grid
12 grid height, aperture or width dimensions size adjusts the acoustic damping of the first resonant cavity 13, strengthens the list that absorbs sound described in oblique incidence
The sound absorbing performance of first body 100.
As a kind of embodiment of the utility model, sound-absorbing porous material is filled in the grid 12；Increase described
The medium-high frequency sound absorption effect of one sound absorber 1.
As the another embodiment of the utility model, porous sound absorption material is filled between the coaming plate 21 and bottom plate 23
Material；Increase the medium-high frequency sound absorption effect of second sound absorber 2.
As another embodiment of the utility model, sound-absorbing porous material is filled in the grid 12；The coaming plate
Sound-absorbing porous material is filled between 21 and bottom plate 23；Increase the middle height of first sound absorber 1 and second sound absorber 2
Frequency sound absorption effect increases the medium-high frequency sound absorption effect of the sound absorption cell cube 100.
Sound-absorbing porous material described in the utility model can be glass fibre cotton, melamine foamed plastic, polyurethane fiber
Or polyurethane foam；But it is not limited to mentioned kind, can be any one porous sound-absorbing material.
Referring to Fig. 5, preferably, the grid 12 is several；First partition 31 is set between adjacent grid 12.Pass through
The first partition 31 is set, the resonant cavity of first sound absorber 1 is increased.
Preferably, second partition 32 is set between the grid 12 and coaming plate 21；The second partition 32 respectively with it is described
Grid 12 and coaming plate 21 connect.By the way that the second partition 32,2 shape of first sound absorber 1 and the second sound absorber is arranged
At independent resonant cavity respectively.
Preferably, the coaming plate 21 is several, and third partition 33 is arranged between adjacent coaming plate 21.By being arranged described the
Three partitions 33 increase the resonant cavity of second sound absorber 2.
As a kind of embodiment of the utility model, the third partition 33 may be configured as the 4th partition 331 and/or
Five partitions 332；
As a kind of embodiment of the utility model, the grid 12 is several；Is arranged between adjacent grid 12
One partition 31；Second partition 32 is set between the grid 12 and coaming plate 21；The second partition 32 respectively with the grid 12
It is connected with coaming plate 21.
As a kind of embodiment of the utility model, the grid 12 is several；Is arranged between adjacent grid 12
One partition 31；The coaming plate 21 is several, setting third partition 33 between adjacent coaming plate 21.
The first partition 31, second partition 32 and third partition 33 can be individually arranged, can also combination of two setting,
It can also be arranged simultaneously；Increase the quantity of the first resonant cavity 13 and the second resonant cavity 22；Different set-up modes, can be to different
The sound wave of incident frequencies absorbs sound.
Sound absorption cell cube 100 described in the utility model be it is several, between several sound absorption cell cubes 100 pass through bonding mode company
It connects.
As a kind of embodiment of sound absorber described in the utility model, structure, the shape of the sound absorption cell cube 100
Shape, size can be identical；It is bonded by glue connection mode；Several sound absorption cell cubes 100 can be bonded to multiple row.
As the another embodiment of sound absorber described in the utility model, outside several sound absorption cell cubes 100
Shape and outer dimension are identical, and 111 quantity of hole in several sound absorption cell cubes 100 is different, and the punching rate of the top plate 11 is not
Together；Several sound absorption cell cubes 100 can be bonded to multiple row.
The material of top plate 11 described above can be stainless steel, aluminium, plastics or hardboard, but be not limited to above-mentioned material；On
The material for stating the grid 12 can be stainless steel, aluminium, plastics or hardboard, but be not limited to above-mentioned material；It is described above
The material of coaming plate 21 can be stainless steel, aluminium, plastics or hardboard, but be not limited to above-mentioned material；Described above first every
Plate 31 can be stainless steel plate, aluminium sheet, plastic plate or hardboard.Second partition 32 described above can be stainless steel plate, aluminium sheet, plastics
Plate or hardboard.Third partition 33 described above can be or stainless steel plate, aluminium sheet, plastic plate or hardboard.
Between the top plate 11, grid 12, coaming plate 21, bottom plate 23, first partition 31, second partition 32 or third partition 33
Connection type, can be bonded by glue connection mode.
Preferably, the coaming plate 21 with a thickness of 0.1~0.3mm, highly be 50~100mm.The thickness of the top plate 11
It is 50~200mm for 0.5~1mm, length or width.The bottom plate 23 with a thickness of 0.5~1mm, length or width be 50~
200mm.The first partition 31 is 50~200mm with a thickness of 0.5~1mm, length or width.Second partition 32 with a thickness of
0.5~1mm, length or width are 50~200mm.Third partition 33 with a thickness of 0.5~1mm, length or width be 50~
200mm。
The utility model is described further below by way of specific embodiment:
Embodiment 1
The sound absorption cell cube 100, including the first sound absorber 1 and the second sound absorber 2；First sound absorber 1
Including grid 12, and it is covered in the top plate 11 at 12 top of grid, opens up hole 111 on the top plate 11；Second sound absorption
Device 2 includes the coaming plate 21 connecting respectively with the border of 12 bottom of grid, and the bottom plate 23 connecting with 21 bottom of coaming plate.
The top plate 11 with a thickness of 0.6mm, length and width is 70mm；The shape of described hole 111 is square,
Its side length is 7mm；The punching rate of the top plate 11 is 1.6%；The height of the grid 12 is 30mm, with a thickness of 0.6mm, length
It is 70mm with width；The mesh shape of the grid 12 is square, and its side length is 7mm；The height of the coaming plate 21 is
80mm。
Embodiment 2
Unlike the first embodiment, the top plate 11 with a thickness of 0.6mm, length and width is 70mm；Described hole
111 shape is square, and its side length is 7mm；The punching rate of the top plate 11 is 3.2%；The height of the grid 12 is
30mm, with a thickness of 0.6mm, length and width is 70mm；The grid of the grid 12 is square, and its side length is 7mm；It is described
The height of coaming plate 21 is 80mm.
Embodiment 3
Unlike the first embodiment, the top plate 11 with a thickness of 0.6mm, length and width is 70mm；Described hole
111 shape is square, and its side length is 7mm；The punching rate of the top plate 11 is 4%；The height of the grid 12 is 30mm,
With a thickness of 0.6mm, length and width is 70mm；The grid of the grid 12 is square, and its side length is 7mm；The coaming plate
21 height is 80mm.
Embodiment 4
Unlike the first embodiment, the top plate 11 with a thickness of 0.6mm, length and width is 70mm；Described hole
111 shape is square, and its side length is 7mm；The punching rate of the top plate 11 is 4.8%；The height of the grid 12 is
30mm, with a thickness of 0.6mm, length and width is 70mm；The grid of the grid 12 is square, and its side length is 7mm；It is described
The height of coaming plate 21 is 80mm.
Embodiment 5
Unlike the first embodiment, the top plate 11 with a thickness of 0.6mm, length and width is 70mm；Described hole
111 shape is regular hexagon, and the side length of regular hexagon is 5mm；The punching rate of the top plate 11 is 2.4%；The grid 12
Height be 30mm, with a thickness of 0.6mm, length and width is 70mm；The grid of the grid 12 is regular hexagon, positive six side
The side length of shape is 5mm；The height of the coaming plate 21 is 80mm.
Embodiment 6
Unlike the first embodiment, the top plate 11 with a thickness of 0.6mm, length and width is 70mm；Described hole
111 shape is equilateral triangle, and the side length of equilateral triangle is 6mm；The punching rate of the top plate 11 is 3.1%；The grid 12
Height be 30mm, with a thickness of 0.6mm, length and width is 70mm；The grid of the grid 12 is equilateral triangle, positive triangle
The side length of shape is 6mm；The height of the coaming plate 21 is 80mm.
Embodiment 7
Absorb sound cell cube 100 described in several embodiments 1, is connected into multiple row by glue connection, constitutes sound absorber.
Embodiment 8
The bonding combination of sound absorption cell cube 100 described in embodiment 1 to embodiment 4 constitutes joint body unit, by several joints
Body unit is connected into multiple row by glue connection, constitutes sound absorber.
Embodiment 9
The bonding combination of sound absorption cell cube 100 described in embodiment 1 to embodiment 6 constitutes joint body unit, by several joints
Body unit is connected into multiple row by glue connection, constitutes sound absorber.
Referring to Fig. 8, sound absorber described in embodiment 7, is 0.95 in the acoustic absorptivity of 160~220Hz resonant frequency
More than, it is 0.6 or more in the acoustic absorptivity of 150Hz-280Hz, the size of sound absorber described in embodiment 7 is only control sound
The 1/19 of wave wavelength.
Referring to Fig. 9, sound absorber described in embodiment 8, passes through the coupling of the first sound absorber 1 of four kinds of different punching rates
It closes, realizes the noise control of broad band low frequency sound wave.The acoustic absorptivity of 125Hz-600Hz resonant frequency is 0.7 or more, is realized
Efficient sound absorption in broad frequency range, the size of sound absorber described in embodiment 8 are only control wave length of sound 1/22.
Referring to Fig. 10, sound absorber described in embodiment 9, pass through the first sound absorber 1 of six kinds of different punching rates
Coupling, the acoustic absorptivity of 100Hz-600Hz resonant frequency are up to 1.0, realize the noise control of broad band low frequency sound wave；Embodiment
The size of sound absorber described in 9 is only control wave length of sound 1/22.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should all be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. sound absorber characterized by comprising sound absorption cell cube (100), the sound absorption cell cube (100) include the first suction
Acoustic device (1) and the second sound absorber (2)；First sound absorber (1) includes grid (12), and is covered in grid (12)
The top plate (11) at top opens up hole (111) on the top plate (11)；Second sound absorber (2) includes, respectively with grid
(12) coaming plate (21) of the border connection of bottom, and the bottom plate (23) being connect with coaming plate (21) bottom.
2. sound absorber according to claim 1, which is characterized in that described hole (111) is several.
3. sound absorber according to claim 1, which is characterized in that fill sound-absorbing porous material in the grid (12).
4. sound absorber according to claim 1, which is characterized in that filled between the coaming plate (21) and bottom plate (23) more
Hole sound absorbing material.
5. sound absorber according to claim 1 or 3, which is characterized in that the grid (12) is several；Adjacent grid
(12) first partition (31) are set between.
6. sound absorber according to claim 1, which is characterized in that is arranged between the grid (12) and coaming plate (21)
Two partitions (32)；The second partition (32) connect with the grid (12) and coaming plate (21) respectively.
7. sound absorber according to claim 1 or 4, which is characterized in that the coaming plate (21) is several, adjacent coaming plate
(21) third partition (33) are set between.
8. according to claim 1-4 or claim 6 any claim described in sound absorber, which is characterized in that the suction
Sound cell cube (100) be it is several, between several sound absorption cell cubes (100) pass through bonding mode connection.
9. sound absorber according to claim 5, which is characterized in that the sound absorption cell cube (100) is several, several suctions
It is connected between sound cell cube (100) by bonding mode.
10. sound absorber according to claim 7, which is characterized in that the sound absorption cell cube (100) be it is several, it is several
It is connected between sound absorption cell cube (100) by bonding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821821762.8U CN209249069U (en) | 2018-11-06 | 2018-11-06 | Sound absorber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821821762.8U CN209249069U (en) | 2018-11-06 | 2018-11-06 | Sound absorber |
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| CN209249069U true CN209249069U (en) | 2019-08-13 |
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ID=67527355
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109448687A (en) * | 2018-11-06 | 2019-03-08 | 株洲国创轨道科技有限公司 | Sound absorber and its manufacturing method |
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2018
- 2018-11-06 CN CN201821821762.8U patent/CN209249069U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109448687A (en) * | 2018-11-06 | 2019-03-08 | 株洲国创轨道科技有限公司 | Sound absorber and its manufacturing method |
| CN109448687B (en) * | 2018-11-06 | 2023-12-26 | 株洲国创轨道科技有限公司 | Sound absorbing device and method for manufacturing the same |
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