CN204303341U - A kind of porous compound sound-absorption structural - Google Patents
A kind of porous compound sound-absorption structural Download PDFInfo
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- CN204303341U CN204303341U CN201420831373.9U CN201420831373U CN204303341U CN 204303341 U CN204303341 U CN 204303341U CN 201420831373 U CN201420831373 U CN 201420831373U CN 204303341 U CN204303341 U CN 204303341U
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Abstract
The utility model relates to acoustic board technical field, disclose a kind of porous compound sound-absorption structural, it comprises cover plate, side plate and base plate, and described cover plate and described base plate relative spacing are arranged, described side plate respectively with described cover plate and base plate compact siro spinning technology, formed sound absorption the back of the body chamber; The porous material layer that one or more layers and described cover plate are oppositely arranged is provided with in described sound absorption back of the body chamber, when described porous material layer is multilayer, acoustic board or sound absorbing membrane is being provided with between porous material layer described in adjacent two layers, described cover plate is provided with some micro-sound-absorbing hole, and every layer of described porous material layer is interval with some perforates.The utility model in the complexity situation not increasing sound absorption structure, can widen the wide band sound absorption of sound absorption structure; And easily process, easy for installation, cost is lower.
Description
Technical field
The utility model relates to acoustic board technical field, particularly relates to a kind of porous compound sound-absorption structural.
Background technology
Traditional perforated plate resonance absorption structure, its perforated plate has enclosed cavity behind each hole, is equivalent to " Helmholtz " resonator of many parallel connections, when incident wave frequency is consistent with the resonant frequency of system, namely produces resonance.Now, the vibration of the reciprocal air at perforated plate hole place, its amplitude reaches maximal value, and friction and damping also maximum, acoustic energy changes heat energy into because of viscous loss, and namely acoustic energy dissipation reaches maximum.This is the advantage of perforated plate resonance absorption structure.But this structure also has its intrinsic shortcoming, and its major defect is: the selectivity of frequency is strong, that is to say that its sound sucting band is narrow, only just can have good sound absorbing capabilities near resonant frequency, and off-resonance frequence, its acoustically effective is obviously deteriorated.Widen effective wide band sound absorption of individual layer sound absorber, a kind of method is the sound absorption structure adopting MULTILAYER COMPOSITE.But multi-layer compound structure significantly increases the complexity of structure, too increase material and cost simultaneously, in practical engineering application, be also subject to the restriction of space length.Another kind method places acoustic absorbant overleaf, but the acoustic absorbant increased can bring the secondary pollution of structure.Having is exactly reduce penetration hole diameter further again, according to the theory of Mr. Ma Dayou, when penetration hole diameter is less than 0.1 millimeter, is expected to the band limit reaching sound absorber.But Conventional machining methods cannot realize the processing in ultramicropore aperture, other job operations are as laser boring, and because of the increase of punch density, production cost also can increase greatly, are not suitable for batch production.Recently, Chinese Academy of Sciences's acoustics expert develop a kind of tube bank sound absorption structure, the low frequency performance of this structural change, too increases the wide band sound absorption of perforated plate structure, but structure relative complex, and processing and fabricating is more difficult.
Utility model content
(1) technical matters that will solve
The technical problems to be solved in the utility model is how in the complexity situation not increasing sound absorption structure, widens the wide band sound absorption of sound absorption structure.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of porous compound sound-absorption structural, and it comprises cover plate, side plate and base plate, and described cover plate and described base plate relative spacing are arranged, described side plate respectively with described cover plate and base plate compact siro spinning technology, formed sound absorption the back of the body chamber; The porous material layer that one or more layers and described cover plate are oppositely arranged is provided with in described sound absorption back of the body chamber, when described porous material layer is multilayer, acoustic board or sound absorbing membrane is being provided with between porous material layer described in adjacent two layers, described cover plate is provided with some micro-sound-absorbing hole, and every layer of described porous material layer is interval with some perforates.
Wherein, described porous material layer is made up of metal foaming material or non-metal foam material.
Wherein, the described porous material layer of different layers is made up of same porosint or porosint not of the same race is made.
Wherein, the perforate on the described porous material layer of different layers is positioned at same position or diverse location.
Wherein, the diameter range of described perforate is 10-50mm, and the shape of described perforate is circular or square.
Wherein, described acoustic board is perforated plate, microperforated panel or Microfracture plate; Described sound absorbing membrane is film, nonwoven fabrics, sound absorption paper or textile fiber material.
Wherein, described sound absorbing membrane is perforated films or not perforated films.
Wherein, described film is polyethylene film or polypropylene film.
Wherein, described cover plate is perforated plate, microperforated panel or Microfracture plate; Described micro-sound-absorbing hole is circular port, square opening, diamond hole, hex hole, fish scale shape hole or slotted eye.
Wherein, described cover plate, side plate and base plate are metal material or nonmetallic materials.
(3) beneficial effect
Compared with prior art, the utility model has the following advantages:
A kind of porous compound sound-absorption structural that the utility model provides, adopts cover plate and base plate relative spacing to arrange, side plate respectively with described cover plate and base plate compact siro spinning technology, being formed absorbs sound carries on the back chamber; The porous material layer that one or more layers and described cover plate are oppositely arranged is provided with in described sound absorption back of the body chamber, when described porous material layer is multilayer, acoustic board or sound absorbing membrane is being provided with between porous material layer described in adjacent two layers, described cover plate is provided with some micro-sound-absorbing hole, and every layer of described porous material layer is interval with some perforates; This porous compound sound-absorption structural combines the micropore sound absorption principle of cover plate, the sound absorption feature of acoustic board or sound absorbing membrane material and porosint, is organically combined by three kinds of acoustic absorbants, has widened the wide band sound absorption of sound absorption structure, had good sound absorbing capabilities; And this compound sound-absorption structural is easily processed, easy for installation, cost is lower.
Accompanying drawing explanation
Fig. 1 is the overall cut-open view of a kind of porous of the utility model compound sound-absorption structural.
In figure: 1: cover plate; 11: micro-sound-absorbing hole; 2: side plate; 3: base plate; 4: porous material layer; 41: perforate; 5: acoustic board or sound absorbing membrane.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following instance for illustration of the utility model, but is not used for limiting scope of the present utility model.
In description of the present utility model, it should be noted that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition the concrete meaning of above-mentioned term in the utility model can be understood.
In addition, in description of the present utility model, except as otherwise noted, the implication of " multiple ", " many ", " many groups " is two or more.
As shown in Figure 1, for a kind of porous compound sound-absorption structural that the utility model provides, it comprises cover plate 1, side plate 2 and base plate 3, and described cover plate 1 is arranged with described base plate 3 relative spacing, described side plate 2 respectively with described cover plate 1 and base plate 3 compact siro spinning technology, formed sound absorption the back of the body chamber; The porous material layer 4 that one or more layers and described cover plate 1 are oppositely arranged is provided with in described sound absorption back of the body chamber, when described porous material layer 4 is multilayer, the present embodiment is set to three layers, acoustic board or sound absorbing membrane 5 is provided with between porous material layer described in adjacent two layers 4, described cover plate 1 is provided with some micro-sound-absorbing hole 11, and every layer of described porous material layer 4 is interval with some perforates 41.This porous compound sound-absorption structural combines that micro-sound-absorbing hole 11 absorbs sound, porosint sound absorption and acoustic board or sound absorbing membrane 5 resonance sound-absorbing three kinds of sound absorption structures, has widened the wide band sound absorption of sound absorption structure.
Described cover plate 1 can be perforated plate, microperforated panel or Microfracture plate, and the shape of described cover plate 1 can be circular, square or other shapes, and described cover plate 1 can choose required cover plate 1 material according to sound sucting band scope and application places; Described micro-sound-absorbing hole 11 on described cover plate 1 can be circular port, square opening, diamond hole, hex hole, fish scale shape hole or slotted eye or other profile hole.
Described porous material layer 4 can be made up of metal foaming material or non-metal foam material.Described metal foaming material light weight, sound insulation, fire-retardant, there is again very strong energy absorption performance; The absorbing sound and lowering noise ability that described non-metal foam material is as excellent in foamglass has, and safety, environmental protection.
The described porous material layer 4 of different layers can be made up of same porosint or porosint not of the same race is made, and can select according to specific needs.
In order to the convenience arranged, the perforate 41 on the described porous material layer 4 of different layers can be positioned at same position or diverse location.The diameter range of described perforate 41 is 10-50mm, and the shape of described perforate 41 can be circular, square or other shapes.
Described acoustic board can be perforated plate, microperforated panel or Microfracture plate; Described sound absorbing membrane can be film, nonwoven fabrics, sound absorption paper or textile fiber material.Further, described sound absorbing membrane can be perforated films or not perforated films.Described film can be polyethylene film or polypropylene film or other film.
Described cover plate 1, side plate 2 and base plate 3 can be all metal material or nonmetallic materials; When described side plate 2 is in little space, when being around solid walls, can omit; Base plate 3 can be firm body also can be elastic body, and when surrounding is solid walls, when the back of the body chamber degree of depth is very little, base plate 3 also can omit.
Described side plate 2 and base plate 3 also can be served as by the solid metope of buildings, acoustic board or sound absorbing membrane 5 and described porous material layer 4 can be encapsulated and form described porous compound sound-absorption structural together with cover plate 1.
As can be seen from the above embodiments, the utility model utilizes that micro-sound-absorbing hole 11 absorbs sound, porosint sound absorption and acoustic board or sound absorbing membrane 5 resonance sound-absorbing three kinds of sound absorption structures, has widened the wide band sound absorption of sound absorption structure; And structure is easily processed, easy for installation, cost is lower.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a porous compound sound-absorption structural, is characterized in that, comprises cover plate, side plate and base plate, and described cover plate and described base plate relative spacing are arranged, described side plate respectively with described cover plate and base plate compact siro spinning technology, formed sound absorption the back of the body chamber; The porous material layer that one or more layers and described cover plate are oppositely arranged is provided with in described sound absorption back of the body chamber, when described porous material layer is multilayer, acoustic board or sound absorbing membrane is being provided with between porous material layer described in adjacent two layers, described cover plate is provided with some micro-sound-absorbing hole, and every layer of described porous material layer is interval with some perforates.
2. porous compound sound-absorption structural as claimed in claim 1, it is characterized in that, described porous material layer is made up of metal foaming material or non-metal foam material.
3. porous compound sound-absorption structural as claimed in claim 1, it is characterized in that, the described porous material layer of different layers is made up of same porosint or porosint not of the same race is made.
4. porous compound sound-absorption structural as claimed in claim 1, it is characterized in that, the perforate on the described porous material layer of different layers is positioned at same position or diverse location.
5. porous compound sound-absorption structural as claimed in claim 1, it is characterized in that, the diameter range of described perforate is 10-50mm, and the shape of described perforate is circular or square.
6. porous compound sound-absorption structural as claimed in claim 1, it is characterized in that, described acoustic board is perforated plate, microperforated panel or Microfracture plate; Described sound absorbing membrane is film, nonwoven fabrics, sound absorption paper or textile fiber material.
7. porous compound sound-absorption structural as claimed in claim 6, is characterized in that, described sound absorbing membrane is perforated films or not perforated films.
8. porous compound sound-absorption structural as claimed in claim 7, it is characterized in that, described film is polyethylene film or polypropylene film.
9. the porous compound sound-absorption structural as described in any one of claim 1-8, is characterized in that, described cover plate is perforated plate, microperforated panel or Microfracture plate; Described micro-sound-absorbing hole is circular port, square opening, diamond hole, hex hole, fish scale shape hole or slotted eye.
10. porous compound sound-absorption structural as claimed in claim 1, it is characterized in that, described cover plate, side plate and base plate are metal material or nonmetallic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420831373.9U CN204303341U (en) | 2014-12-24 | 2014-12-24 | A kind of porous compound sound-absorption structural |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420831373.9U CN204303341U (en) | 2014-12-24 | 2014-12-24 | A kind of porous compound sound-absorption structural |
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| CN204303341U true CN204303341U (en) | 2015-04-29 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108867904A (en) * | 2018-07-06 | 2018-11-23 | 长春理工大学 | There is the slim multilayer acoustic board of high acoustic absorption coefficient in low frequency band |
| CN109356297A (en) * | 2018-11-06 | 2019-02-19 | 株洲国创轨道科技有限公司 | Sound absorber |
| CN111341292A (en) * | 2019-12-05 | 2020-06-26 | 南京航空航天大学 | Perforated plate laminated sound absorption structure |
| CN112497858A (en) * | 2021-01-29 | 2021-03-16 | 北京市劳动保护科学研究所 | Plate-film composite sound absorption plate and processing method thereof |
-
2014
- 2014-12-24 CN CN201420831373.9U patent/CN204303341U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108867904A (en) * | 2018-07-06 | 2018-11-23 | 长春理工大学 | There is the slim multilayer acoustic board of high acoustic absorption coefficient in low frequency band |
| CN109356297A (en) * | 2018-11-06 | 2019-02-19 | 株洲国创轨道科技有限公司 | Sound absorber |
| CN111341292A (en) * | 2019-12-05 | 2020-06-26 | 南京航空航天大学 | Perforated plate laminated sound absorption structure |
| CN112497858A (en) * | 2021-01-29 | 2021-03-16 | 北京市劳动保护科学研究所 | Plate-film composite sound absorption plate and processing method thereof |
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