CN209249071U - Sound absorber - Google Patents
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- CN209249071U CN209249071U CN201821821835.3U CN201821821835U CN209249071U CN 209249071 U CN209249071 U CN 209249071U CN 201821821835 U CN201821821835 U CN 201821821835U CN 209249071 U CN209249071 U CN 209249071U
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- 239000006096 absorbing agent Substances 0.000 title claims abstract description 56
- 238000010521 absorption reaction Methods 0.000 claims abstract description 53
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- 230000000694 effects Effects 0.000 abstract description 9
- 230000009467 reduction Effects 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 description 12
- 239000004033 plastic Substances 0.000 description 9
- 229920003023 plastic Polymers 0.000 description 9
- 239000004411 aluminium Substances 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 8
- 239000011111 cardboard Substances 0.000 description 8
- 239000010935 stainless steel Substances 0.000 description 8
- 229910001220 stainless steel Inorganic materials 0.000 description 8
- 239000011358 absorbing material Substances 0.000 description 5
- 238000013016 damping Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 206010003084 Areflexia Diseases 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- 229920006306 polyurethane fiber Polymers 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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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 absorbing duct and resonantron, and the resonantron includes top plate, coaming plate and bottom plate, through-hole is opened up on the top plate, the absorbing duct is mounted in through-hole, the both ends open of absorbing duct；Second sound absorber includes micropunch pipe, and the micropunch pipe includes microperforated panel, side baffle and lower plate, and the side baffle is connect with microperforated panel and lower plate respectively；The coaming plate is connect with side baffle.The utility model realizes the sound absorption effect of broadband by the coupling sound absorption of the first sound absorber and the second sound absorber；Widen sound sucting band.
Description
Technical field
The utility model belongs to noise reduction technology field, and in particular to sound absorber.
Background technique
Realize that noise control is the important channel of Noise Prevention and Treatment using sound-absorbing material.Currently used sound-absorbing material is porous
Sound-absorbing material mainly generates viscous dissipation, porous sound absorption to incident acoustic wave by the pore structure inside sound-absorbing porous material
Material is eventually converted into thermal energy to the viscous effect of sound wave and is consumed, to realize the absorption to sound wave.Porous sound absorption material
The viscous effect of material generates big damping to the sound wave of high frequency, and sound-absorbing porous material is good to the sound absorbing performance of the sound wave of high frequency；
Viscous effect is basically will not produce to the sound wave of low frequency, the sound absorbing performance of sound-absorbing porous material is poor in low frequency.
And the plate thickness cavity of traditional microperforated panel soundabsorbing construction is pure cavity acoustic impedance, is limited in finite size and weight
Under, the sound absorption of low-frequency sound wave is controlled, there is " bottleneck " phenomenon, effectively to inhibit low-frequency noise that acoustical material must just be significantly increased
Thickness or quality.
Therefore how to promote sound absorbing performance, widen sound sucting band, being 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 widen sound sucting band, and can be real
It efficiently absorbs sound 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 absorbing duct and resonance
Pipe, the resonantron includes top plate, coaming plate and bottom plate, and through-hole is opened up on the top plate, and the absorbing duct is mounted in through-hole, is inhaled
The both ends open of sound pipe；Second sound absorber includes micropunch pipe, the micropunch pipe include microperforated panel, side baffle and
Lower plate, the side baffle are connect with microperforated panel and lower plate respectively；The coaming plate is connect with side baffle.
Preferably, the through-hole is several；The absorbing duct is several；Several absorbing ducts are separately mounted to corresponding through-hole
It is interior.
Preferably, the resonantron is at least two, and adjacent resonantron passes through bonding connection.
Preferably, the quantity of the through-hole opened up on the top plate of the adjacent resonantron and/or aperture are different.
Preferably, the microperforated panel is at least two；Air layer is formed between adjacent microperforated panel.
Preferably, the punching rate of the adjacent microperforated panel is different.
Preferably, sound-absorbing porous material is filled in the resonantron.
Preferably, sound-absorbing porous material is filled between the side baffle and lower 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 the prior art, has the advantage that the first sound absorber packet described in the utility model
Absorbing duct and resonantron are included, the cavity that the outer surface of absorbing duct and the inner surface of resonantron are formed constitutes resonant cavity, works as all-bottom sound
When wave is incident on resonantron, a part of incident acoustic wave is incident on top plate, and top plate and incident acoustic wave generate impedance matching, incident sound
Enter top plate to wave areflexia, is absorbed by top plate；Inside another part sound wave incident to resonantron, due to the inner surface of resonant cavity
Sound scattering, it is of reciprocating vibration that sound wave pushes the air column in absorbing duct to do, and is dissipated by viscous damping, realizes that low-frequency resonance is inhaled
Sound.
Micropore is set on microperforated panel described in the utility model；The micropore is circular hole, polygonal hole or slit hole；Institute
Stating micropore can uniformly or non-uniformly arrange.
Second sound absorber described in the utility model includes micropunch pipe, when medium-high frequency incident acoustic wave is to micropunch pipe,
A part of incident acoustic wave is incident on microperforated panel, and incident acoustic wave and microperforated panel generate impedance matching, incident acoustic wave areflexia
Ground enters microperforated panel, is absorbed by microperforated panel；Another part medium-high frequency incident acoustic wave is entered in micropunch pipe by micropore, micro-
Air in perforated pipe moves back and forth under the action of incident acoustic wave, generates vibration, and friction and damping action enable a part of sound
It is converted into thermal energy and consumes, realize medium-high frequency sound absorption.
The utility model realizes the suction of broadband by the coupling sound absorption of the first sound absorber and the second sound absorber
Sound effective value；Widen sound sucting band.
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 second structural representation for the sound absorption cell cube that the utility model embodiment provides；
Fig. 3 is the schematic top plan view for the sound absorption cell cube that the utility model embodiment provides；
Fig. 4 is the A of Fig. 3 to schematic cross-sectional view；
Fig. 5 is the D of Fig. 3 to schematic cross-sectional view；
Fig. 6 is the E of Fig. 3 to schematic cross-sectional view；
Fig. 7 is the F of Fig. 3 to schematic cross-sectional view；
Fig. 8 is one of the structural schematic diagram of sound absorber that the utility model embodiment provides；
Fig. 9 is the second structural representation for the sound absorber that the utility model embodiment provides；
Figure 10 is the acoustic absorptivity schematic diagram of sound absorber described in the utility model embodiment.
Wherein, each appended drawing reference in figure:
100- sound absorption cell cube；The first sound absorber of 1-；The second sound absorber of 2-；11- resonantron；12- absorbing duct；21-
Micropunch pipe；The first resonantron of 111-；The second resonantron of 112-；113- third resonantron；The 4th resonantron of 114-；211- first
Micropunch pipe；212- the second micropunch pipe.
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 absorbing duct 12 and resonantron 11, the resonantron 11
Including top plate, coaming plate and bottom plate, through-hole is opened up on the top plate, the absorbing duct 12 is mounted in through-hole, and the two of absorbing duct 12
End opening；Second sound absorber 2 include micropunch pipe 21, the micropunch pipe 21 include microperforated panel, side baffle and under
Bottom plate, the side baffle are connect with microperforated panel and lower plate respectively；The coaming plate is connect with side baffle.
The shape of through-hole described in the utility model is circular hole, polygonal hole or slit hole；The through-hole can uniformly or not
It is evenly arranged.
First sound absorber 1 described in the utility model includes absorbing duct 12 and resonantron 11, the outer surface of absorbing duct 12
The cavity formed with the inner surface of resonantron 11 constitutes resonant cavity, and when low-frequency sound wave is incident on resonantron 11, a part is incident
On sound wave incident to top plate, top plate and incident acoustic wave generate impedance matching, enter top plate to incident acoustic wave areflexia, are inhaled by top plate
It receives；Inside another part sound wave incident to resonantron 11, due to the inner surface sound scattering of resonant cavity, sound wave pushes absorbing duct 12
Interior air column does of reciprocating vibration, is dissipated by viscous damping, realizes low-frequency resonance sound absorption.
Micropore is set on microperforated panel described in the utility model；The micropore is circular hole, polygonal hole or slit hole；Institute
Stating micropore can uniformly or non-uniformly arrange.
Second sound absorber 2 described in the utility model includes micropunch pipe 21, medium-high frequency incident acoustic wave to micropunch pipe
When 21, a part of incident acoustic wave is incident on microperforated panel, and incident acoustic wave and microperforated panel generate impedance matching, incident acoustic wave without
Enter microperforated panel reflectingly, is absorbed by microperforated panel；Another part medium-high frequency incident acoustic wave enters micropunch pipe by micropore
In 21, the air in micropunch pipe 21 moves back and forth under the action of incident acoustic wave, generates vibration, and friction and damping action make one
Part sound can be converted into thermal energy and consume, and realize medium-high frequency sound absorption.
The utility model realizes broadband by the coupling sound absorption of the first sound absorber 1 and the second sound absorber 2
Sound absorption effect；Widen sound sucting band.
As a kind of embodiment of the utility model, the top of the absorbing duct 12 and resonantron 11 is flushed.
As a kind of embodiment of the utility model, the resonantron 11 can be integration setting or the top of resonantron 11
Plate, coaming plate and bottom plate are individually arranged.
As a kind of embodiment of the utility model, the top plate with a thickness of 0.5~1mm, length or width 100
~200mm, punching rate are 1%~8%；The aperture of the through-hole or width are 0.5~8mm.
As a kind of embodiment of the utility model, the microperforated panel with a thickness of 0.5~1mm, length or width
For 100~200mm, punching rate is 1%~10%；The aperture of the micropore or width are 0.1~8mm.
As a kind of embodiment of the utility model, the coaming plate with a thickness of 0.1~0.3mm；Height for 30~
50mm。
As a kind of embodiment of the utility model, the side baffle with a thickness of 0.1~0.3mm；Height for 30~
50mm。
Preferably, the through-hole is several；The absorbing duct 12 is several；Several absorbing ducts 12 are separately mounted to corresponding
In through-hole.It is of reciprocating vibration that incident acoustic wave pushes the air column in several absorbing ducts 12 to do, and increases the sound absorption rate to incident acoustic wave.
Preferably, the length of several absorbing ducts 12 is different.Further increase the sound absorption effect to different low-frequency sound waves.
As a kind of embodiment of the utility model, the absorbing duct 12 can be cylindrical tube, polygonal tube, conical tube
Or swan-neck；The absorbing duct 12 is not limited to above-mentioned shape, can be any tubular structure.The absorbing duct 12 is located at resonantron
The flexible setting in part in 11, the air column volume in absorbing duct 12 is different, different from the resonant frequency of incident acoustic wave, can be right
The sound wave of different frequency absorbs sound.
As a kind of embodiment of the utility model, the length of the absorbing duct 12 is 10~40mm, aperture or width
For 5~8mm.
Preferably, the resonantron 11 is at least two, and adjacent resonantron 11 passes through bonding connection.Increase the resonance
The quantity of pipe 11 increases sound absorption effect.As a kind of embodiment of the utility model, adjacent resonantron 11 can be for laterally
It is adjacent or vertically-adjacent.
Preferably, the shape of adjacent resonantron 11 is different.The resonantron 11 can be cylindrical tube, polygon column tube or circle
Taper Pipe.Since the bulk & form and volume of resonantron 11 are of different sizes, it is past that incident acoustic wave pushes the air column in absorbing duct 12 to do
The frequency of multiplex vibration it is different, it can be achieved that the low-frequency sound wave to different frequency sound absorption, widen the sound absorption of low-frequency sound wave frequency.
Preferably, the number of openings opened up on the top plate of the adjacent resonantron 11 and/or aperture are different.Further increase
Add the sound absorption effect to different low-frequency sound waves.
Preferably, the microperforated panel is at least two；Air layer is formed between adjacent microperforated panel.Increase sound absorption effect
Fruit.
Preferably, the punching rate of the adjacent microperforated panel is different.It can be achieved to add the sound absorption of the sound wave of different frequency
The sound absorption of wide frequency of sound wave.The punching rate is the ratio that the micropore gross area of microperforated panel occupies the gross area of microperforated panel.
Preferably, sound-absorbing porous material is filled in the resonantron 11.The sound-absorbing porous material can be glass fibre
Cotton, melamine foamed plastic, polyurethane fiber or polyurethane foam；But it is not limited to mentioned kind, it is porous to can be any one
Property sound-absorbing material.Further increase the sound absorption of centering high frequency sound wave.
Preferably, sound-absorbing porous material is filled between the side baffle and lower plate.The sound-absorbing porous material can be
Glass fibre cotton, melamine foamed plastic, polyurethane fiber or polyurethane foam；But it is not limited to mentioned kind, can be any
A kind of porous sound-absorbing material.Further increase the sound absorption of centering high frequency sound wave.
In actual use, according to incident acoustic wave frequency range, several sound absorption cell cubes 100 are combined, constitute sound absorption dress
It sets；It absorbs sound to the incident acoustic wave of different frequency, can absorb sound to complex noise source, widen sound sucting band.
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.
The material of top plate described in the utility model can be stainless steel, aluminium, plastics or cardboard；But it is not limited to above-mentioned material
Matter；The material of microperforated panel described in the utility model can be stainless steel, aluminium, plastics or cardboard；But it is not limited to above-mentioned material；
Coaming plate described in the utility model is stainless steel plate, aluminium sheet, plastic plate or cardboard.The coaming plate is stainless steel plate, aluminium sheet, plastic plate
Or cardboard.The bottom plate is stainless steel plate, aluminium sheet, plastic plate or cardboard.The microperforated panel is stainless steel plate, aluminium sheet, plastics
Plate or cardboard.The side baffle is stainless steel plate, aluminium sheet, plastic plate or cardboard.The lower plate is stainless steel plate, aluminium sheet, modeling
Flitch or cardboard.
The utility model is described further below by way of specific embodiment:
Referring to Figure 2 together to Fig. 7, the sound absorption cell cube 100 includes the first sound absorber 1 and the second sound absorber 2；
First sound absorber 1 includes the first resonantron 111 and the first absorbing duct 121, the second resonantron 112 and the second absorbing duct
122, third resonantron 113 and third absorbing duct 123 and the 4th resonantron 114 and the 4th absorbing duct 124；Described first is total
Vibration tube 111 is connected by the top plate of the bottom plate of the first resonantron 111 and the second resonantron 112 respectively with the second resonantron 112；Institute
The first resonantron 111 and third resonantron 113 are stated respectively by the first coaming plate of resonantron 111 and enclosing for third resonantron 113
Plate connection；The third resonantron 113 and the 4th resonantron 114 pass through the bottom plate and the 4th of the third resonantron 113 respectively
The top plate of resonantron 114 connects；Second resonantron 112 and the 4th resonantron 114 pass through enclosing for the second resonantron 112 respectively
The connection of the coaming plate of plate and the 4th resonantron 114；The top plate of first resonantron 111, the top plate of the second resonantron 112, third
The top plate thickness of the top plate of resonantron 113 and the 4th resonantron 114 is respectively as follows: 0.6mm, 0.6mm, 0.6mm, 0.6mm, length point
Not Wei 120mm, 120mm, 120mm, 120mm, width is respectively 120mm, 120mm, 120mm, 120mm, and punching rate is respectively as follows:
6%, 4%, 7%, 7%；The through-hole of first resonantron 111, the through-hole of the second resonantron 112, third resonantron 113 it is logical
The shape of the through-hole of hole and the 4th resonantron 114 is respectively circle, and the aperture of through-hole is respectively 5mm, 7mm, 0.6mm, 0.6mm；
The coaming plate of first resonantron 111, the coaming plate of the second resonantron 112, third resonantron 113 coaming plate and the 4th
The thickness of the coaming plate of resonantron 114 is respectively 0.2mm, 0.2mm, 0.2mm, 0.2mm, height be respectively 50mm, 50mm, 50mm,
50mm；
The length point of first absorbing duct 121, the second absorbing duct 122, third absorbing duct 123 and the 4th absorbing duct 124
It Wei not 12mm, 30mm, 20mm, 20mm.
Second sound absorber 2 includes the first micropunch pipe 211 and the second micropunch pipe 212；First micropunch
The connection of the microperforated panel of the lower plate of pipe 211 and the second micropunch pipe 212；The side baffle of the first micropunch pipe 211 and
The coaming plate of three resonantrons 113 connects；The coaming plate connection of the side baffle and the 4th resonantron 114 of the second micropunch pipe 212；
The microperforated panel of the first micropunch pipe 211 with a thickness of 0.6mm, punching rate 8%, length 120mm is wide
Degree is 120mm；
The microperforated panel of the second micropunch pipe 212 with a thickness of 0.6mm, punching rate 8%, length 120mm is wide
Degree is 120mm；
The micro-pore shape of the first micropunch pipe 211 is circle, aperture 0.1mm；The second micropunch pipe
212 micro-pore shape is circle, aperture 0.1mm；
The side baffle of the first micropunch pipe 211 with a thickness of 0.2mm, be highly 50mm；The second micropunch pipe
212 side baffle with a thickness of 0.2mm, be highly 50mm.
Referring to Fig. 9, sound absorption cell cube 100 described above be it is several, by bonding side between several sound absorption cell cubes 100
Formula connection, is in turn connected into multiple row, constitutes sound absorber.
Referring to Fig. 10, the sound absorber, equal in the acoustic absorptivity of 100-125Hz, 27-260Hz, 3500-5750Hz
Acoustic absorptivity at 0.5 or more, resonant frequency reaches 0.95 or more, and the size of the sound absorber is only control sound
The 1/34 of wave wavelength.Effective sound absorption frequency range of middle low frequency absorption unit is 50-400Hz, the noise reduction frequency of intermediate frequency sound absorption unit
Rate range is 400-2000Hz, and the noise reduction frequency range of high frequency sound absorption unit is 2000-6400Hz.Width may be implemented in composite structure
The anti-acoustic capability of band.
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 absorbing duct (12) and resonantron (11), described
Resonantron (11) includes top plate, coaming plate and bottom plate, and through-hole is opened up on the top plate, and the absorbing duct (12) is mounted in through-hole,
The both ends open of absorbing duct (12)；Second sound absorber (2) includes micropunch pipe (21), and the micropunch pipe (21) includes
Microperforated panel, side baffle and lower plate, the side baffle are connect with microperforated panel and lower plate respectively；The coaming plate and side baffle
Connection.
2. sound absorber according to claim 1, which is characterized in that the through-hole is several；The absorbing duct (12) is
It is several；Several absorbing ducts (12) are separately mounted in corresponding through-hole.
3. sound absorber according to claim 1, which is characterized in that the resonantron (11) is at least two, adjacent
Resonantron (11) passes through bonding connection.
4. sound absorber according to claim 3, which is characterized in that opened up on the top plate of the adjacent resonantron (11)
Through-hole quantity and/or aperture it is different.
5. sound absorber according to claim 1, which is characterized in that the microperforated panel is at least two；Adjacent is micro-
Air layer is formed between perforated plate.
6. sound absorber according to claim 5, which is characterized in that the punching rate of the adjacent microperforated panel is different.
7. sound absorber according to claim 1 or 3, which is characterized in that fill porous sound absorption in the resonantron (11)
Material.
8. sound absorber according to claim 1, which is characterized in that fill porous suction between the side baffle and lower plate
Sound material.
9. sound absorber described in -6 or 8 any claims according to claim 1, which is characterized in that the sound absorption cell cube
(100) pass through bonding mode connection to be several, between several sound absorption cell cubes (100).
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 |
|---|---|---|---|
| CN201821821835.3U CN209249071U (en) | 2018-11-06 | 2018-11-06 | Sound absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821821835.3U CN209249071U (en) | 2018-11-06 | 2018-11-06 | Sound absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209249071U true CN209249071U (en) | 2019-08-13 |
Family
ID=67527312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821821835.3U Active CN209249071U (en) | 2018-11-06 | 2018-11-06 | Sound absorber |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109285534A (en) * | 2018-11-06 | 2019-01-29 | 株洲国创轨道科技有限公司 | sound absorbing device |
| CN110626364A (en) * | 2019-09-24 | 2019-12-31 | 中车株洲电力机车有限公司 | Sound insulation structure of cooling system of railway vehicle and manufacturing method of sound insulation structure |
| CN110838282A (en) * | 2019-11-21 | 2020-02-25 | 珠海格力电器股份有限公司 | Composite sound absorption device and method for drying air duct of washing machine and washing machine |
| CN115588421A (en) * | 2022-10-24 | 2023-01-10 | 北京航空航天大学 | Sound absorbing device and noise reduction equipment |
| CN116543737A (en) * | 2023-06-15 | 2023-08-04 | 广东电网有限责任公司广州供电局 | Muffler |
-
2018
- 2018-11-06 CN CN201821821835.3U patent/CN209249071U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109285534A (en) * | 2018-11-06 | 2019-01-29 | 株洲国创轨道科技有限公司 | sound absorbing device |
| CN110626364A (en) * | 2019-09-24 | 2019-12-31 | 中车株洲电力机车有限公司 | Sound insulation structure of cooling system of railway vehicle and manufacturing method of sound insulation structure |
| CN110626364B (en) * | 2019-09-24 | 2021-10-22 | 中车株洲电力机车有限公司 | Sound insulation structure of cooling system of railway vehicle and manufacturing method of sound insulation structure |
| CN110838282A (en) * | 2019-11-21 | 2020-02-25 | 珠海格力电器股份有限公司 | Composite sound absorption device and method for drying air duct of washing machine and washing machine |
| CN110838282B (en) * | 2019-11-21 | 2021-04-09 | 珠海格力电器股份有限公司 | Composite sound absorption device and method for drying air duct of washing machine and washing machine |
| CN115588421A (en) * | 2022-10-24 | 2023-01-10 | 北京航空航天大学 | Sound absorbing device and noise reduction equipment |
| CN116543737A (en) * | 2023-06-15 | 2023-08-04 | 广东电网有限责任公司广州供电局 | Muffler |
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