CN205529956U - Broadband sound absorption cell board - Google Patents
Broadband sound absorption cell board Download PDFInfo
- Publication number
- CN205529956U CN205529956U CN201620383653.7U CN201620383653U CN205529956U CN 205529956 U CN205529956 U CN 205529956U CN 201620383653 U CN201620383653 U CN 201620383653U CN 205529956 U CN205529956 U CN 205529956U
- Authority
- CN
- China
- Prior art keywords
- sound
- sound absorption
- cell board
- resonance
- absorption cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 87
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 37
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000009413 insulation Methods 0.000 claims abstract description 9
- 239000011094 fiberboard Substances 0.000 claims description 25
- 239000012528 membrane Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 20
- 239000000835 fiber Substances 0.000 claims description 14
- 239000011358 absorbing material Substances 0.000 claims description 12
- 239000011490 mineral wool Substances 0.000 claims description 8
- 229920000742 Cotton Polymers 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 5
- 229920002799 BoPET Polymers 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 229910000851 Alloy steel Inorganic materials 0.000 claims 1
- 239000000956 alloy Substances 0.000 claims 1
- 230000004888 barrier function Effects 0.000 abstract description 6
- 239000004411 aluminium Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000008030 elimination Effects 0.000 abstract description 3
- 238000003379 elimination reaction Methods 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 239000010409 thin film Substances 0.000 description 19
- 239000010408 film Substances 0.000 description 6
- 230000009467 reduction Effects 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000007373 indentation Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229920000914 Metallic fiber Polymers 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Building Environments (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model relates to a broadband sound absorption cell board belongs to the sqouynd absorption lowering noise field. This sound absorption cell board is mainly including sound insulation board cavity, resonance sheet metal or resonance film, perforation or microperforated panel, aluminium fibreboard and casing, and the sound absorption cell board has a lamellar structure, by openly be the aluminium fibreboard in proper order to the back, perforates or the microperforated panel, and resonance sheet metal or resonance film and sound insulation board cavity, casing encapsulate in the front except that the cell board and other peripheries on four sides the back. The utility model discloses sound absorption frequency band width, the especially low -frequency range sound absorption effect of sound absorption cell board improves a lot, simple structure, light in weight, easily processing preparation, the range of application is extensive, can be applied to the noise elimination of locating such as along the line of indoor wall, outdoor sound barrier, railway station platform, railway and fall and make an uproar.
Description
Technical field
This utility model relates to a kind of broadband sound absorption cell board, is specifically related to one and combines resonance thin plate or resonate thin
Film low frequency absorption, perforation or microperforated panel low frequency absorption, the compound sound-absorption structural of porous fibre sound absorption structure medium, high frequency sound absorption,
Belong to sqouynd absorption lowering noise field.
Background technology
Sound pollution not only severe jamming daily life, be in for a long time in noise also can endanger healthy.
Along with China Express Railway is fast-developing, vehicle travels increasingly faster, and Along Railway and platform district are required to arrange noise-reducing device,
In sound barrier, platform being installed such as high-speed railway both sides, acoustic board etc. is installed.
Sound-absorbing porous material is conventional sound absorption and noise reduction material, including foamed sound-absorbing material and fibrous absorbent material etc., its
Sound absorption frequency range is mainly the medium-high frequency of more than 300Hz.The sound absorption principle of sound-absorbing porous material is that sound wave incident is to porous sound absorption material
In material, causing air movement in hole, due to friction and the viscous force of pore lining near-space gas, portion of air is converted into heat energy；
Sound wave multiple reflections in hole simultaneously, makes acoustic energy gradually decay.Common fiber absorbing material have glass cotton, asbestos, rock wool,
Metallic fiber material etc..The aluminum fibre plate being made up of aluminum fiber and aluminium expanded sheets has the excellent physics such as corrosion-resistant, high temperature resistant, hydrophobic
Chemical property.Document " material behavior of aluminum fiber acoustic board and application " (Zhongxiang City's jade tablet, Mo Fangshuo. the material of aluminum fiberboard acoustic board
Material characteristic and application [J]. New Building Materials, 2000 (11): 18-22) give aluminum fiberboard collocation different-thickness cavity
Acoustic absorptivity, contrast test aluminum fiberboard watering and spill the change of acoustic absorptivity after ash, find that water and dust are to aluminum fiberboard
Acoustic absorptivity impact is little.
Sound absorbent perforated structure make use of Helmholz resonance to absorb sound principle, has a sound absorption low advantage of frequency, but due to
Acoustic resistance is little, and sound sucting band is narrower；The microperforated absorber that acoustics authority Mr. Ma Dayou proposes, has acoustic frequency bandwidth, suction
The advantage that sonic system number is high.Perforated plate and microperforated panel simple in construction, be prone to processing, be widely used in various sound absorption structure design
In.Dead room or semianechoic room wall all use the sound-absorbing material with Wedge structure.Wedge structure can be in air and sound absorption
Forming transitional region between material, the equivalent acoustic impedance rate of wedge is gradually increased from air to sound-absorbing material, contributes to sound wave and enters
Enter sound-absorbing material；Meanwhile, Wedge structure increases sound absorbent surface and amasss, and sound wave can occur multiple reflections between wedge, is effectively improved
Sound absorption efficiency.
Thin plate or thin film tensioning are fixed in the frame structure of sealing, may be constructed resonance sound-absorbing structure.In structure
Near resonant frequency, thin plate or thin vibration of membrane are the strongest, and because fricative energy loss is maximum, now acoustic absorptivity is
Greatly.The resonance sound-absorbing frequency of thin plate is typically at 80-300Hz, and the resonance sound-absorbing frequency of thin film is at 200-2000Hz.Thin plate or thin film
Resonance sound-absorbing frequency band narrower, increase damping and with broadening bandwidth, but simultaneously can reduce again acoustic absorptivity.
Above-mentioned several sound-absorbing material or structure all can not meet wide band acoustically effective, but respective sound absorption frequency range
Difference, therefore designs a kind of structure combining multiple sound absorption principle and can realize the effect of broadband sound absorption.
Utility model content
The problem that the purpose of this utility model is to solve existing sound-absorbing material or structure faces sound sucting band is narrow, it is provided that
A kind of broadband sound absorption cell board combining multiple sound absorption principle.
The purpose of this utility model completes by following technical solution:
A kind of broadband sound absorption cell board, this sound absorption cell board mainly include sound insulationg board chamber, resonance thin plate or resonance membrane,
Perforation or microperforated panel, aluminum fiberboard and housing etc., described sound absorption cell board has layer structure, by front to the back side successively
For aluminum fiberboard, perforation or microperforated panel, resonance thin plate or resonance membrane and sound insulationg board chamber, described housing is encapsulated in except unit
The periphery at other four sides outside the front and back of plate.
Described sound insulationg board chamber is made up of sound insulation sheet material, box shaped, and described resonance thin plate or resonance membrane cover (or close
Envelope) at it towards cell board front (i.e. sound source) side, utilize thin plate resonance or thin film resonance absorption all-bottom sound.
Sound insulationg board chamber is made up of the sound insulation sheet material with excellent sound insulation property and structural strength, sound insulation sheet material and resonance thin plate
Can be plank, metallic plate, fiberglass or PC plastics etc., resonance membrane can be soft-film ceiling, PE film, PVF film or PET film etc..
Further, sound insulationg board intracavity also can fiberfill fibers sound-absorbing material such as glass cotton, rock wool, mineral wool etc., but with resonance
Thin plate or resonance membrane do not contact.
Described perforation or microperforated panel are arranged on resonance thin plate or the outside of resonance membrane, its cross section indentation or ripple
Wave-like.Perforation or microperforated panel sound absorption frequency range a little higher than resonance thin plate or the sound absorption frequency range of resonance membrane, further
The wide band sound absorption of broadening low-frequency range.
Between described resonance thin plate or resonance membrane and perforation or microperforated panel, and perforation or microperforated panel and aluminum fiber
Certain gap is all left between plate.Remain with between perforation or microperforated panel and resonance thin plate or resonance membrane certain away from
From, particular location noise reduction frequency range according to actual needs adjusts to reach optimum efficiency.Aluminum fiberboard at outermost layer, towards
A certain distance is remained with, concrete distance noise reduction frequency according to actual needs between Sounnd source direction, and perforation or microperforated panel
Scope adjusts to reach optimum efficiency.Having the aluminum fiberboard of certain thickness cavity for absorbing medium, high frequency noise, aluminum is fine simultaneously
Dimension plate also can blocks dust enter inside cell board.
Described housing is upper by sound insulationg board chamber, resonance thin plate or resonance membrane, perforation or microperforated panel, aluminum fiberboard etc.
Under, left and right side fixedly secure, whole sound absorption structure is packaged into flat rectangular shape.Housing uses color steel, aluminum to close
The materials such as gold are made.
Described housing top and the bottom may be designed as concave-convex type nested structure, steady with improve when multiple cell board combines up and down
Qualitative, meet the sound barrier of differing heights or the requirement of absorbing wall.
Above-mentioned broadband sound absorption cell board is one side sound absorption, can also be designed as double-face sound-absorbing.The two of double-face sound-absorbing structure
Symmetrical structure can be made in side, it is also possible to is designed as unsymmetric structure according to noise practical situation.The both sides of double-face sound-absorbing structure
The sound insulation sheet material at the back side can be shared.
This utility model is resonated by thin plate or thin film resonance sound-absorbing structure, perforation or Micropunch Acoustic Board, aluminum fabric acoustic absorption
Plate etc. three part composition sound absorption structure, utilizes housing by fixing for the combination of each sound absorption structure.Resonance thin plate or resonance membrane cover
Sound insulationg board accent, seals with sound insulationg board chamber and forms resonance sound-absorbing structure, and intracavity can only seal air, it is possible to fills appropriate porous and inhales
Sound material.Perforation or microperforated panel, perforation or microperforated panel indentation or wavy is had before resonance thin plate or resonance membrane；Wear
Having one layer of aluminum fiberboard before hole or microperforated panel, aluminum fiberboard is just to noise source direction.This utility model utilize resonance thin plate or
The medium, high frequency sound absorption of resonance membrane and perforation or the low frequency absorption of microperforated panel and aluminum fiberboard realizes the broadband that structure is overall
Acoustically effective.
Operation principle of the present utility model:
This utility model combines resonance thin plate or resonance membrane low frequency absorption, bores a hole or microperforated panel low frequency absorption, many
Hole fiber sound absorption structure medium, high frequency sound absorption, it is achieved that wide band acoustically effective.Owing to resonance sound-absorbing structure has wide band sound absorption
Narrow shortcoming, utilizes resonance thin plate or resonance membrane to carry out the sound absorption of further broadening low frequency with perforation or microperforated panel the most simultaneously
Bandwidth.Perforation or microperforated panel are designed as zigzag or wavy, utilize the principle of Wedge structure to improve acoustic absorptivity.Utilize
There is the aluminum fiberboard of certain cavity to absorb medium, high frequency noise, and blocks dust enters inside cell board.
Advantage of the present utility model:
This utility model make use of multiple sqouynd absorption lowering noise measure, and the frequency range combining various measure sound absorption realizes broadband
The purpose of sound absorption, in particular improves the acoustically effective of low-frequency range.This utility model can not use and can cause dust pollution
Glass cotton, rock wool etc., being also filled in thin plate resonance or thin film resonant structure even if using, will not enter in surrounding air.This
The acoustic frequency bandwidth of utility model broadband sound absorption cell board, particularly low-frequency range acoustically effective improves a lot；This practicality is new
Type simple in construction, it is easy to processing and fabricating, lightweight, have wide range of applications, may be used for indoor noise elimination noise reduction；Utilize fire-resistant, anti-
The corrosion each structure of design of material, it may also be used for make the acoustic wall etc. under outdoor sound barrier, railroad platform.
Accompanying drawing explanation
Fig. 1 is the package assembly schematic diagram (side is not yet sealed) of this utility model broadband sound absorption cell board.
Fig. 2 is the profile of this utility model broadband sound absorption cell board, and Fig. 2-1 is the magnified partial view of Fig. 2.
Fig. 3 is the generalized section of this utility model double-face sound-absorbing structure.
Main Reference Numerals:
1 sound insulationg board 2 vibration isolation plate chamber
3 resonance thin plates or thin film 4 are bored a hole or microperforated panel
5 aluminum fiberboard 6 housings
Detailed description of the invention
Below in conjunction with the accompanying drawings detailed description of the invention of the present utility model is described further.
As shown in Figure 1, 2, respectively this utility model broadband sound absorption structural representation of cell board and profile, Fig. 2-
1 is the magnified partial view of Fig. 2, and sound absorption cell board main body of the present utility model mainly includes thin plate resonance or thin film resonance sound-absorbing knot
Structure, perforation or microperforated panel 4, aluminum fiberboard 5, housing 6 etc., made box shaped sound insulationg board chamber 2 by sound insulationg board 1, towards sound source
2 mouthfuls of the sound insulationg board chamber of side employing resonance thin plate or thin film 3 cover, and seal formation thin plate resonance with sound insulationg board chamber 2 or thin film is total to
Shake sound absorption structure.This cell board is followed successively by aluminum fiberboard 5, perforation or microperforated panel 4 from outside to inside, and resonate thin plate or thin film 3, every
Sound plate chamber 2, between resonance thin plate or thin film 3 and perforation or microperforated panel 4 and between perforation or microperforated panel 4 and aluminum fiberboard 5
All leave a certain distance.
The Os Draconis of thin plate resonance or thin film resonance sound-absorbing structure by having big oise insulation factor, the sound insulationg board 1 of high intensity is constituted, can
Material selection includes that plank, metallic plate, fiberglass, PC plastics etc., resonance thin plate may be used without above-mentioned material.Thin by changing resonance
In plate thickness and sounding board chamber 2, air layer thickness is to adjust resonance sound-absorbing frequency range.Resonance membrane can use soft-film ceiling, PE
Film, PVF film, PET film etc..Air can be only sealed, it is possible to fill appropriate porous fibre sound-absorbing material, such as glass in vibration isolation plate chamber 2
Cotton, rock wool, mineral wool etc., but can not contact with resonance thin plate or resonance membrane.
There are perforation or microperforated panel 4, perforation or microperforated panel 4 indentation or wavy before resonance thin plate or thin film 3, make
For preferably, use metallic plate first to do perforation and process, then punch forming.When the size that cell board makes is bigger, if necessary, need
Perforation or microperforated panel 4 are increased fixation.Perforated plate aperture and punching rate and with resonance thin plate or the spacing root of thin film 3
Adjust according to required sound absorption frequency range.
Being aluminum fiberboard 5 at cell board towards the outermost layer of sound source side, aluminum fiberboard is just to noise source direction, by changing
The thickness of change aluminum fiberboard 5 and the aluminum fiberboard 5 distance away from perforation or microperforated panel 4 adjust the absorption frequency of centering, high-frequency noise
Section.
Housing 6 uses the material such as color steel, aluminium alloy to make, and to cell board, up and down and left and right side is packaged, will be every
Sound plate chamber 2, resonance thin plate or thin film 3, perforation or microperforated panel 4, aluminum fiberboard 5 is firmly secured in metal shell, by whole
Sound absorption structure is packaged into flat rectangular shape, play fixing, support, the effect such as protection, constitute together with each sound absorption structure
Sound absorption cell board.Housing 6 top and the bottom may be designed as concave-convex type nested structure, steady with improve when multiple cell board combines up and down
Qualitative, meet the sound barrier of differing heights or the requirement of absorbing wall.
Broadband sound absorption cell board can be one side sound absorption structure, it is possible to be designed as double-face sound-absorbing structure.Double-face sound-absorbing structure,
Symmetrical structure can be made in both sides, it is also possible to is designed as unsymmetric structure according to noise practical situation.
As it is shown on figure 3, sound absorption cell board is designed as double-face sound-absorbing structure, both sides share the sound insulationg board at the back side, both sides pair
The sound absorption structure answered is designed as symmetric form.
Broadband of the present utility model sound absorption cell board combines multiple sound absorption structure, including thin plate resonance or thin film resonance
Sound absorption structure, perforation or Micropunch Acoustic Board, aluminum fiber acoustic board, outside housing etc..Utilize thin plate resonance or thin film resonance
Sound absorption structure improves the low frequency absorption coefficient of cell board with perforated plate or microperforated panel, utilizes aluminum fiberboard to absorb medium, high frequency and makes an uproar
Sound.Wherein perforated plate or microperforated panel make use of the sound absorption principle of Wedge structure, are zigzag or waveform by its Cross section Design.
The acoustic frequency bandwidth of this utility model broadband sound absorption cell board, particularly low-frequency range acoustically effective improves a lot, and can apply
In indoor wall, the noise elimination noise reduction of outdoor sound barrier, station platform, Along Railway etc..
Described above is not to this utility model structure, the restriction of technique, any this utility model is made simple transformation after
Structure, or there is the technique of identical function, there is analogous shape but change structure proportion, size, key position has identical
The different process processing method of function, belongs to the protection domain of this utility model patent.
Claims (10)
1. a broadband sound absorption cell board, it is characterised in that: mainly include sound insulationg board chamber, resonance thin plate or resonance membrane, wear
Hole or microperforated panel, aluminum fiberboard and housing, described sound absorption cell board has layer structure, front is followed successively by aluminum to the back side
Fibre board, perforation or microperforated panel, resonance thin plate or resonance membrane and sound insulationg board chamber, described housing is encapsulated in except cell board
The periphery at other four sides outside front and back.
Broadband the most according to claim 1 sound absorption cell board, it is characterised in that: described sound insulationg board chamber is by the sheet material that insulates against sound
Making, box shaped, described resonance thin plate or resonance membrane cover at it towards side, cell board front.
Broadband the most according to claim 2 sound absorption cell board, it is characterised in that: described sound insulation sheet material and resonance thin plate
For plank, metallic plate, fiberglass or PC plastics, described resonance membrane is soft-film ceiling, PE film, PVF film or PET film.
Broadband the most according to claim 2 sound absorption cell board, it is characterised in that: described sound insulationg board intracavity fiberfill fibers
Sound-absorbing material, described fiber absorbing material does not contacts with resonance thin plate or resonance membrane.
Broadband the most according to claim 4 sound absorption cell board, it is characterised in that: described fiber absorbing material is glass
Cotton, rock wool or mineral wool.
Broadband the most according to claim 1 sound absorption cell board, it is characterised in that: cutting of described perforation or microperforated panel
Face is zigzag or wavy.
Broadband the most according to claim 1 sound absorption cell board, it is characterised in that: described resonance thin plate or resonance membrane
And between perforation or microperforated panel, and leave gap between perforation or microperforated panel and aluminum fiberboard.
Broadband the most according to claim 1 sound absorption cell board, it is characterised in that: described housing uses color steel or aluminum
Alloy material is made.
Broadband the most according to claim 8 sound absorption cell board, it is characterised in that: the top and the bottom of described housing are concavo-convex
Type nested structure.
Broadband the most according to claim 1 sound absorption cell board, it is characterised in that: described broadband sound absorption cell board
For double-face sound-absorbing structure, its both sides are symmetrical structure or unsymmetric structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620383653.7U CN205529956U (en) | 2016-04-28 | 2016-04-28 | Broadband sound absorption cell board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620383653.7U CN205529956U (en) | 2016-04-28 | 2016-04-28 | Broadband sound absorption cell board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205529956U true CN205529956U (en) | 2016-08-31 |
Family
ID=56794469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620383653.7U Expired - Fee Related CN205529956U (en) | 2016-04-28 | 2016-04-28 | Broadband sound absorption cell board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205529956U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803965A (en) * | 2016-04-28 | 2016-07-27 | 中国铁道科学研究院 | Wideband sound absorption unit plate |
| CN109024327A (en) * | 2018-08-13 | 2018-12-18 | 安徽中源环保科技有限公司 | A kind of semiclosed noise barrier for high-speed rail |
| CN109252597A (en) * | 2018-10-24 | 2019-01-22 | 沈阳建筑大学 | A kind of Variable reflectance sound absorption dimensional component |
| CN109487714A (en) * | 2018-09-28 | 2019-03-19 | 江苏新光环保工程有限公司 | A kind of full frequency band sqouynd absorption lowering noise plate and preparation method thereof |
| CN110700129A (en) * | 2019-10-27 | 2020-01-17 | 山西尚风抑风墙科技有限公司 | Multi-spectrum sound barrier unit plate |
| CN112681545A (en) * | 2020-12-10 | 2021-04-20 | 北京大米科技有限公司 | Noise reduction device and noise reduction system |
-
2016
- 2016-04-28 CN CN201620383653.7U patent/CN205529956U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803965A (en) * | 2016-04-28 | 2016-07-27 | 中国铁道科学研究院 | Wideband sound absorption unit plate |
| CN105803965B (en) * | 2016-04-28 | 2018-04-10 | 中国铁道科学研究院 | A kind of broadband sound absorption cell board |
| CN109024327A (en) * | 2018-08-13 | 2018-12-18 | 安徽中源环保科技有限公司 | A kind of semiclosed noise barrier for high-speed rail |
| CN109487714A (en) * | 2018-09-28 | 2019-03-19 | 江苏新光环保工程有限公司 | A kind of full frequency band sqouynd absorption lowering noise plate and preparation method thereof |
| CN109252597A (en) * | 2018-10-24 | 2019-01-22 | 沈阳建筑大学 | A kind of Variable reflectance sound absorption dimensional component |
| CN109252597B (en) * | 2018-10-24 | 2024-03-12 | 沈阳建筑大学 | Variable reflection sound absorption space component |
| CN110700129A (en) * | 2019-10-27 | 2020-01-17 | 山西尚风抑风墙科技有限公司 | Multi-spectrum sound barrier unit plate |
| CN112681545A (en) * | 2020-12-10 | 2021-04-20 | 北京大米科技有限公司 | Noise reduction device and noise reduction system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105803965B (en) | A kind of broadband sound absorption cell board | |
| CN205529956U (en) | Broadband sound absorption cell board | |
| CN1074492C (en) | False ceiling | |
| RU2495500C2 (en) | Sound-absorbing structure | |
| US20200143784A1 (en) | The Acoustic Metamaterial Units with the Function of Soundproof, Flow Passing and Heat; Transfer Enhancement, the Composite Structure and the Preparation Methods thereof | |
| CN204783543U (en) | A sound proof box and compressor unit spare for compressor | |
| CN112779998B (en) | Full-band super-structure sound absorber | |
| CN205177403U (en) | Noise reduction sound absorption layer | |
| CN1754201B (en) | Sound-absorbing structure using thin film | |
| CN108611997B (en) | Composite sound barrier | |
| CN106558302A (en) | A kind of sound source device noise-reduction method | |
| CN106782475A (en) | Composite resonant sound absorption structure | |
| CN203573642U (en) | Sound absorption structure | |
| CN210639979U (en) | Inhale sound insulation composite member and transformer | |
| CN104164842A (en) | Light high-strength metal-ceramic composite acoustic board | |
| CN111501594A (en) | Traffic noise prevention and control sound barrier structure based on bionics principle | |
| CN108396668A (en) | Denoising structure at the top of the anti-diffraction sound barrier of low frequency | |
| CN107610688B (en) | Cavity tube composite sound insulation structure | |
| CN114855660A (en) | Phononic crystal sound absorber, sound barrier and using and mounting method | |
| CN204791946U (en) | Sound absorption and insulation device for moving sound source and frequency division sound absorption and insulation cover comprising same | |
| CN204185784U (en) | A kind of speedway sound insulation and noise reduction shade curtain | |
| CN113216025A (en) | Road sound barrier noise reduction device and structural design method thereof | |
| CN114603943B (en) | Heat-preservation sound-absorption and sound-insulation enclosure wall for transformer substation | |
| CN215164854U (en) | Transparent sound insulation device for sound barrier | |
| CN211446650U (en) | Transparent sound absorption cap for top of sound insulation barrier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20200428 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |