CN110111763A - A kind of pierced acoustic Meta Materials sound absorption structure of multilayer - Google Patents
A kind of pierced acoustic Meta Materials sound absorption structure of multilayer Download PDFInfo
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- CN110111763A CN110111763A CN201910390249.0A CN201910390249A CN110111763A CN 110111763 A CN110111763 A CN 110111763A CN 201910390249 A CN201910390249 A CN 201910390249A CN 110111763 A CN110111763 A CN 110111763A
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- 239000004743 Polypropylene Substances 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
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- 239000010409 thin film Substances 0.000 claims description 3
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
- G10K11/168—Plural layers of different materials, e.g. sandwiches
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0276—Polyester fibres
- B32B2262/0284—Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/10—Properties of the layers or laminate having particular acoustical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/718—Weight, e.g. weight per square meter
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a kind of pierced acoustic Meta Materials sound absorption structures of multilayer, first layer blanket, perforated films, the first perforation blanket, the first non-perforated films, the second perforation blanket, the second non-perforated films, the 4th layer of blanket including being from top to bottom sequentially overlapped setting, it is provided with several film holed techniques on the perforated films, several blanket perforation are provided in the first perforation blanket, the second perforation blanket and corresponds.The present invention constitutes several cavity structures by removal blanket own material, combination film, can efficient absorption acoustic wave energy, there are excellent sound absorption characteristics.The present invention compares traditional homogeneous blanket material or double impedance materials, under condition of equivalent thickness, has more preferably sound absorption effect, and save raw material.Structure design is simple, and handling ease is low in cost, and on various occasions, such as automobile, subway, building decoration have very wide application prospect.
Description
Technical field
The present invention relates to acoustic metamaterial field of noise control, the pierced acoustic Meta Materials of specifically a kind of multilayer, which absorb sound, to be tied
Structure.
Background technique
Nowadays the noise that we touch is increasingly complicated, the noise problem faced is increasingly severe, whether noise source
The broad degree of diversity or noise frequency range, in the noise circumstance in such a complexity, to we it is physically and mentally healthy with
And working efficiency influence is very serious.In field of noise control, due to the spy that the wavelength of low-frequency noise is longer, penetration capacity is strong
Point, either in fields such as automobile, subway or building decorations, how to solve the problems, such as low-frequency noise be a long-standing problem I
Problem.
Acoustic metamaterial is a kind of composite material of artificial cycle, due to some special physical characteristics, is had good
Sound absorption and insulation characteristic.Acoustic metamaterial can achieve the effect that small size controls big wavelength, break traditional homogeneous material foundation
Lighting noise reduction is realized in the limitation of mass law.In recent years, the research in terms of acoustic metamaterial had many good progress,
The it is proposed of various types of Meta Materials and different cellular constructions, noise problems various for solution, which provide, much to be opened
The thinking put.
Fang etc. proposes a kind of acoustic metamaterial of the one-dimensional helmholtz resonance chamber array of sub-wavelength scope, total at it
Find that equivalent elastic modulus is that negative value, due to a large amount of energy of its internal reservoir, then goes out in resonant frequency at vibration frequency
The phenomenon that now transmiting low ebb.Mei Jun et al. proposes a kind of absorbing sound type of unsymmetric structure being made of film and half-round metal piece
Acoustic metamaterial generates biggish elastic curvature energy due to flapping for sheet metal in its vicinity, can be in 100~1000Hz
Fully absorb the sound wave in a part of frequency.Ding et al. proposes a kind of open hollow spherical model based on locally resonant, obtains
To the acoustic metamaterial with negative elasticity modulus, this material is larger in 900-1500Hz acoustic attenuation.
It describes in patent CN106782477A (being published on May 31st, 2017) a kind of with membrane structure
Helmholtz chamber acoustic metamaterial, is made of the aluminium block with cylindrical cavity and rubber film.The structure is below in 500Hz
In frequency range, transmission coefficient curve can produce multiple peak values and the corresponding frequency width ranges of peak value reach 30Hz.It is logical
The noise control acoustics metamaterial structure of required low-frequency range can be obtained in the geometric parameter for crossing change structure.
In several acoustic metamaterials mentioned above, either Helmholtz chamber or film type Meta Materials are all
Using the theory of locally resonant, makes resonant frequency and the matching of sound wave incident frequencies of structure, achieve the purpose that reduce noise.But
The design of structure belongs to preliminary unit conceptual phase, and structure design comparison is complicated, and material therefor is related to metal mostly
Part, undoubtedly increase manufacturing cost and difficulty of processing and reliability of structure it is all to be improved.Therefore a kind of structure letter is provided
Single, handling ease, the low-cost acoustic construction that can be used for various fields is necessary.
Summary of the invention
The object of the present invention is to provide a kind of pierced acoustic Meta Materials sound absorption structures of multilayer, different and intermediate by thickness
The blanket of two layers of perforation and the use of combination film, realize the noise control effect efficiently to absorb sound.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of pierced acoustic Meta Materials sound absorption structure of multilayer, the first layer cotton including being from top to bottom sequentially overlapped setting
Felt, perforated films, the first perforation blanket, the first non-perforated films, the second perforation blanket, the second non-perforated films, the 4th layer of cotton
Felt is provided with several film holed techniques on the perforated films, is provided in the first perforation blanket, the second perforation blanket several
Blanket perforation and one-to-one correspondence.
Preferably, the first layer blanket, the first perforation blanket, the second perforation blanket, the 4th layer of blanket are by poly-
Ester (PET) fiber or polypropylene (PP) fiber or regeneration cotton are made.
Preferably, the perforated films, the first non-perforated films, the second non-perforated films are that polyethylene (PE) is thin
Film or polypropylene (PP) film or polyamide (PA) film.
Preferably, the first layer blanket, the 4th layer of blanket with a thickness of 8~12mm.
Preferably, it is described first perforation blanket, second perforation blanket with a thickness of 4~6mm.
Preferably, the aperture of the blanket perforation is 10~30mm, the centre distance of Kong Yukong is 30~60mm.
In above scheme, the first perforation blanket, the second perforation blanket are processed by perforation and combine perforation
Film and the second non-perforated films constitute several cylindrical cavity structures, and the first non-perforated films are classified as two parts up and down.
Preferably, the perforated films are with a thickness of 0.1~0.2mm, the aperture of film holed technique is 1~3mm, Kong Yukong it
Between distance be 5~10mm.
Preferably, first non-perforated films with a thickness of 0.025~0.1mm, the second non-perforated films with a thickness of
0.025~0.1mm.
Preferably, the side face sound wave incident direction of the perforated films.
Preferably, the first layer blanket, perforated films, the first perforation blanket, the first non-perforated films, the second perforation
Blanket, the second non-perforated films, pasted by glue spraying between the 4th layer of blanket it is integral.
Compared with prior art, the beneficial effects of the present invention are:
1, the multilayer sound absorption acoustic metamaterial structure of perforation of the present invention, in the sound absorption effect of low frequency 500Hz or so
It is substantially better than the double impedance materials nowadays generally used.
2, the multilayer sound absorption acoustic metamaterial structure of perforation of the present invention, passes through and removes own partial blanket material structure
At cavity structure, for the material compared to homogeneous equal thickness, there is light-weighted effect, and save material.
3, the multilayer sound absorption acoustic metamaterial structure of perforation of the present invention, structure design is simple, and raw material are not related to
Metal parts, handling ease is low in cost, and on various occasions, such as automobile, subway, building decoration have very wide application
Prospect.
Detailed description of the invention
Fig. 1 is the multilayer sound absorption acoustic metamaterial structural schematic diagram of the perforation of the embodiment of the present invention；
Fig. 2 is the multilayer sound absorption acoustic metamaterial Structure explosion diagram perforated shown in Fig. 1；
Fig. 3 is the multilayer sound absorption acoustic metamaterial structure partial cross-sectional view perforated shown in Fig. 1；
Fig. 4 is the perforation blanket structural schematic diagram in the embodiment of the present invention；
Fig. 5 is the top view of the perforation blanket structure in the embodiment of the present invention；
Fig. 6 is the structural schematic diagram of the membrana perforata in the embodiment of the present invention；
Fig. 7 is the multilayer sound absorption acoustic metamaterial structure of the perforation of the embodiment of the present invention and the acoustic absorptivity of double impedance materials
Contrast curve chart.
Attached drawing mark explanation: 1- first layer blanket, 2- perforated films, 3- perforation blanket, the first non-perforated films of 4-, 5- are worn
Hole blanket, the second non-perforated films of 6-, the 4th layer of blanket of 7-, 8- film holed technique, the perforation of 9- blanket.
Specific embodiment
For a better understanding of the present invention, the embodiment of the present invention is described in further details with reference to the accompanying drawing.
For the multilayer sound absorption acoustic metamaterial of perforation, it is necessary first to determine global shape, thickness according to application environment, so
Afterwards according to corresponding performance requirement, the thickness and aperture ruler of suitable blanket thickness distribution, blanket percent opening and film are selected
It is very little.
Fig. 1 shows a kind of schematic diagram of the pierced acoustic Meta Materials sound absorption structure embodiment of multilayer of the present invention,
Fig. 2 is the explosive view of the pierced acoustic Meta Materials sound absorption structure of multilayer shown in Fig. 1.
A kind of pierced acoustic Meta Materials sound absorption structure of multilayer, the first layer blanket including being from top to bottom sequentially overlapped setting
1, the perforation of perforated films 2, first blanket 3, the first non-perforated films 4, second perforation blanket 5, the second non-perforated films the 6, the 4th
Layer blanket 7, several film holed techniques 8 are provided on the perforated films 2, and the first perforation blanket 3, second is perforated in blanket 5
It is provided with several blanket perforation 9 and corresponds.The acoustic metamaterial structure size is 540mm*540mm.
As shown in figure 3, one-to-one two perforation up and down constitute a cylindrical cavity, the perforation on each cavity upper layer
Film includes the aperture 8 that several diameters are 1mm, and cavity middle part is divided into two parts up and down by the first non-perforated films 4, then shape
At a membrane helmholtz resonance chamber.
Fig. 4 and it is shown in fig. 5 be it is described first perforation blanket 3, second perforate blanket 5 perspective view and top view, it is described
The aperture of the blanket perforation 9 of first perforation blanket 3, the second perforation blanket 5 is 30mm, and the centre distance of Kong Yukong is
60mm.The arrangement mode of blanket perforation 9 can be the rectangular arranged of rule, triangle disposition is staggered or random
Arrangement.
Shown in fig. 6 is the structure partial enlarged diagram of perforated films 2, and the aperture of film holed technique 8 is 1mm, Kong Yukong
The distance between be 6mm.
The first layer blanket 1, first perforates the perforation of blanket 3, second blanket 5, the 4th layer of blanket 7 by PET
Fiber is made；The perforated films 2, the first non-perforated films 4, the second non-perforated films 6 belong to polyethylene film.
Both materials are all the common used material on automobile interior decoration sound absorption part at present.The present embodiment uses 3M glue spraying by described first
Layer blanket 1, the perforation of perforated films 2, first blanket 3, the first non-perforated films 4, second perforation blanket 5, the second non-perforated films
6, the 4th layer of blanket 7 is pasted together, and guarantees to fit closely between each layer.
The present invention constructs the resonant cavity of several arrays according to the principle of resonance sound-absorbing structure in one flat plate structure, to reach
To the purpose of resonance sound-absorbing.Resonant cavity has the direction of the side face sound source incidence of perforated film.When sound wave is from forward entrance,
It by cavity structure, resonates with cavity, achievees the purpose that resonance sound-absorbing.First non-perforated films 4 can be with cavity coupling
It closes, changes the intrinsic frequency of cavity.
The multilayer perforation structure of above-described embodiment and double impedance materials are subjected to Experimental comparison, obtain suction as shown in Figure 7
Sonic system number curve.Sound absorption experiment carries out in Alpha cabin, and Alpha cabin is the reverberation chamber of scaled down version, and sensor uses
B&K2669 microphone hangs on cabin top.Exemplar lies against bilge center, and entangles exemplar with a contour metal frame, prevents
The sound absorption of exemplar edge.As can be seen that the sound absorbing performance of the multilayer sound absorption acoustic metamaterial of perforation is got well than double impedances in low-frequency range
Very much, double impedance materials especially are substantially better than in 500Hz or so.And can effectively realize product lightweight, it is easy to process, at
This is cheap so that it has good application prospect in various fields.
Above-described embodiment is only presently preferred embodiments of the present invention, practical range not for the purpose of limiting the invention.According to heat
Requirement of shelter, system, which can be adjusted to, integrates heat-insulated and heat accumulation thermal protection system, integrated heat reflection and heat-insulated thermal protection system
With the thermal protection system of integrated heat reflection and heat accumulation；It is required according to thermal protection, heat accumulating can both use disposable
The material that can be recycled for multiple times can also be used in material.Equivalent changes and modifications made by all contents under this invention are this
Invention claim range claimed.
Claims (10)
1. a kind of pierced acoustic Meta Materials sound absorption structure of multilayer, which is characterized in that including being from top to bottom sequentially overlapped setting
First layer blanket (1), perforated films (2), first perforation blanket (3), the first non-perforated films (4), second perforation blanket (5),
Second non-perforated films (6), the 4th layer of blanket (7) are provided with several film holed techniques (8) on the perforated films (2), described
It is provided with several blanket perforation (9) in one perforation blanket (3), the second perforation blanket (5) and corresponds.
2. the pierced acoustic Meta Materials sound absorption structure of multilayer according to claim 1, it is characterised in that: the first layer
Blanket (1), the first perforation blanket (3), the second perforation blanket (5), the 4th layer of blanket (7) are by polyester fiber or polypropylene fibre
Or regeneration cotton is made.
3. the pierced acoustic Meta Materials sound absorption structure of multilayer according to claim 1, it is characterised in that: the perforation is thin
Film (2), the first non-perforated films (4), the second non-perforated films (6) are that polyethylene film or polypropylene film or polyamide are thin
Film.
4. the pierced acoustic Meta Materials sound absorption structure of multilayer according to claim 1, it is characterised in that: the first layer
Blanket (1), the 4th layer of blanket (7) with a thickness of 8 ~ 12mm.
5. the pierced acoustic Meta Materials sound absorption structure of multilayer according to claim 1, it is characterised in that: first perforation
Blanket (3), second perforation blanket (5) with a thickness of 4 ~ 6mm.
6. the pierced acoustic Meta Materials sound absorption structure of multilayer according to claim 1, it is characterised in that: the blanket perforation
(9) aperture is 10 ~ 30mm, and the centre distance of Kong Yukong is 30 ~ 60mm.
7. the pierced acoustic Meta Materials sound absorption structure of multilayer according to claim 1, it is characterised in that: the perforated films
(2) with a thickness of 0.1 ~ 0.2mm, the aperture of film holed technique (8) is 1 ~ 3mm, and the distance between Kong Yukong is 5 ~ 10mm.
8. the pierced acoustic Meta Materials sound absorption structure of multilayer according to claim 1, it is characterised in that: described first non-wears
Hole film (4) with a thickness of 0.025 ~ 0.1mm, the second non-perforated films (6) are with a thickness of 0.025 ~ 0.1mm.
9. the pierced acoustic Meta Materials sound absorption structure of multilayer according to claim 1, it is characterised in that: the perforated films
(2) side face sound wave incident direction.
10. the pierced acoustic Meta Materials sound absorption structure of multilayer according to claim 1, it is characterised in that: the first layer
It is blanket (1), perforated films (2), the first perforation blanket (3), the first non-perforated films (4), the second perforation blanket (5), second non-
It is pasted integrally between perforated films (6), the 4th layer of blanket (7) by glue spraying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910390249.0A CN110111763A (en) | 2019-05-10 | 2019-05-10 | A kind of pierced acoustic Meta Materials sound absorption structure of multilayer |
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| CN201910390249.0A CN110111763A (en) | 2019-05-10 | 2019-05-10 | A kind of pierced acoustic Meta Materials sound absorption structure of multilayer |
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| CN201910390249.0A Pending CN110111763A (en) | 2019-05-10 | 2019-05-10 | A kind of pierced acoustic Meta Materials sound absorption structure of multilayer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111341292A (en) * | 2019-12-05 | 2020-06-26 | 南京航空航天大学 | Perforated plate laminated sound absorption structure |
| CN113067498A (en) * | 2021-03-01 | 2021-07-02 | 同济大学 | Multilayer plate energy harvesting structure based on defect state acoustic metamaterial |
| CN114371224A (en) * | 2021-12-03 | 2022-04-19 | 华南理工大学 | Test method for ABA structure random incidence sound absorption coefficient |
| CN115064146A (en) * | 2022-04-01 | 2022-09-16 | 哈尔滨工程大学 | Compound three-dimensional periodic sound absorption and insulation integrated acoustic superstructure |
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| US20030062217A1 (en) * | 2001-09-28 | 2003-04-03 | Ping Sheng | Acoustic attenuation materials |
| CN102275346A (en) * | 2011-05-16 | 2011-12-14 | 东华大学 | Sound absorption composite structural material and preparation method thereof |
| CN105931630A (en) * | 2016-04-01 | 2016-09-07 | 北京理工大学 | Composite sound absorption structure for improving metal fiber felt low frequency sound absorption performance |
| CN106782477A (en) * | 2016-12-16 | 2017-05-31 | 江苏大学 | A kind of Helmholtz chambers acoustic metamaterial with membrane structure |
| WO2018154864A1 (en) * | 2017-02-27 | 2018-08-30 | 日東電工株式会社 | Sound-absorbing material |
| CN210271770U (en) * | 2019-05-10 | 2020-04-07 | 华南理工大学 | Multilayer perforated acoustic metamaterial sound absorption structure |
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| CN113067498A (en) * | 2021-03-01 | 2021-07-02 | 同济大学 | Multilayer plate energy harvesting structure based on defect state acoustic metamaterial |
| CN114371224A (en) * | 2021-12-03 | 2022-04-19 | 华南理工大学 | Test method for ABA structure random incidence sound absorption coefficient |
| CN114371224B (en) * | 2021-12-03 | 2023-08-22 | 华南理工大学 | Test method for random incidence sound absorption coefficient of ABA structure |
| CN115064146A (en) * | 2022-04-01 | 2022-09-16 | 哈尔滨工程大学 | Compound three-dimensional periodic sound absorption and insulation integrated acoustic superstructure |
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