CN202658756U - Sound absorption material - Google Patents
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- CN202658756U CN202658756U CN 201220200777 CN201220200777U CN202658756U CN 202658756 U CN202658756 U CN 202658756U CN 201220200777 CN201220200777 CN 201220200777 CN 201220200777 U CN201220200777 U CN 201220200777U CN 202658756 U CN202658756 U CN 202658756U
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Abstract
The utility model discloses a sound absorption material, and belongs to the field of architectural acoustics. The sound absorption material comprises at least two layers of accordion fold-shaped fibrous porous material slices of which the thicknesses are less than 1.2 millimeters and the porosity is less than 85 percent and which are provided with micropores with the average pore diameters of less than 0.16 millimeter, wherein accordion fold crest lines of the slices are connected with accordion fold valley lines of the slices to form the accordion fold-shaped fibrous porous material slices serving as sound absorption layers; and triangular gradient space among the accordion folds is used as a resonant sound absorption cavity, and the sound absorption material has an accordion fold structure. According to the sound absorption material, sound absorption is performed by utilizing a composite acoustic impedance structure which is formed by multiple micropore fiber thin layers and the gradient triangular cavity, so that the sound absorption performance reaches the standard of solid glass wool materials of the same thicknesses; by utilizing plant fiber filter paper, the sound absorption material is sanitary, environment-friendly and low in cost; and due to the adoption of the accordion fold structure, the size of the sound absorption material is compressed by at least 20 times, and the sound absorption material is convenient to store and transport.
Description
Technical field
The utility model belongs to the building acoustics field, specially refers to a kind of sound absorption material.
Background technology
The sound absorption material that is used at present the building acoustics engineering mainly comprises glass wool. the fibrous porous material of the minerals such as rock wool.Fibrous porous material is comprised of a large amount of solid grains and open micropore or the gap that connects, sound wave enters the glutinous heat waste that its inside is collapsed by air vibration, with the friction loss of tortuous pore wall, the reflected refraction decay in hole all will make acoustic energy become heat energy dissipation in environment.The glass wool material is owing to acoustic frequency bandwidth, and sound absorption coefficient is high, and sound absorption coefficient characteristic spectrum curve is straight, is the sound absorption material of present building acoustics engineering first-selection, and consumption is very large.Its unit weight is generally selected 32K～64K, and thickness is generally selected 30～50 millimeters, and more employing is arranged on glass wool the modes such as entrant sound ornament materials rear and installs; For improving low frequency absorption, the cavity (air layer) of 50～150 millimeters of thickness can be set also at the rear of glass wool usually again.The glass wool material is because there is sound absorbing capabilities good, and weight is lighter, and is cheap, the advantage such as does not fire, thereby is the present sound absorption material of consumption maximum in the sound absorbent for building.But there is major defect in glass wool class material aspect hygienic environment-protecting, and defective mainly comprises easy generation chip floating dust, easily makes moist to produce the pollution of going mouldy, and easily causes a large amount of solid waste.In addition, glass wool class material also has volume larger, stores the defectives such as transportation inconvenience.
Because glass wool and rock wool material have been proved and can have caused breathing problem, medically can not get rid of the carcinogenic possibility of its material, so research and develop substituting sound absorption material, in order to reduce use even abandon using the fibrous porous material of mineral, it is exactly a major issue of building acoustics Material Field always.The acoustic investigation person of China once placed hope on the micropunch sound absorption technique, such as in " without fiber sound absorption material progress (physics) " literary composition, they have introduced the actual conditions of microperforated panel resonance sound-absorbing structure, stated with possibility and the important meaning of instead of glass fiber-like sound absorption material; And for example in " practical limit of microperforated panel (acoustic journal) " literary composition, the acoustics authority of China points out that the micro-perforation sound absorption material of low-cost production bore dia 0.1 millimeter is not only technological invention, also is the significant development of sound absorption material.
The microperforated panel resonance sound-absorbing structure be with the aperture less than 1 millimeter, perforated percentage is less than the sound absorption construction of cavity (air layer) composition behind 10% microperforated panel and its plate.This structure has been avoided the problems such as the chip of glass fiber class material and the contaminated environment of going mouldy because filling other sound absorption material.Practical microperforated panel mainly contains 0.6 millimeter of micropunch diameter, and the aluminum microperforated panel of perforated percentage 1～2% is used for requiring the hospital of air high-cleanness, high and the ventilating engineering noise reduction that the high-tech class is researched and produced the place at present.The double-deck microperforated panel structure of the most selections of microperforated panel resonance sound-absorbing structure, the mode of usefulness increase secondary resonance system is the broadening sound sucting band to some extent, improves sound absorbing capabilities.Since later stage in last century; development along with the perforation process technology; some new microperforated panels have appearred; print the micropunch metal sheet that etching process is made such as the employing of Beijing labour protection research institute; the micropunch polycarbonate film that Germany adopts laser ablation process to make; 0.1～0.2 millimeter in two kinds of product micropunch apertures, perforated percentage 0.8～1.2%.The microperforated panel resonance sound-absorbing structure only is comprised of microperforated panel and cavity, need not fill other sound absorption material, very health and environmental protection.But, the sound absorption coefficient characteristic curve big rise and fall of microperforated panel resonance sound-absorbing structure, the difficult level of bringing up near the glass wool material of sound absorption property; The microperforated panel cost is more expensive, and economy is also less than the glass wool material.So, rely on it to reverse the situation that people continue to use in a large number the unhygienic not environmental protection of glass wool class material, be difficult to.
Fibrous porous material also comprises the fibrous porous material sheet that adopts string or chemical fibre or wire etc. material to make.These fibrous porous material sheets can be made by single raw material, such as filter paper. nonwoven. and glass fibre belt also can be mixed by plurality of raw materials.Known, an important indicator of fibrous porous material is porosity, and it refers to volume of air in the material and the ratio of material cumulative volume; Porosity is different from the perforated percentage of microperforated panel, and the latter refers to the ratio of micropunch area and the microperforated panel gross area.Known, filter paper is generally made with the Populus deltoides fiber, and the great micropore of quantity or gap are arranged, gas or liquid by the time can tackle solid particle greater than certain diameter, reach and make the liquid state that mixes and the purpose of solid matter separation.Filter paper comprises: quantitatively, and thickness, fibre diameter, porosity, air permeability, maximum diameter of hole, average pore size, dust capaciting ability, gas-flow resistance, filter efficiency, and tensile strength, bursting strength, deflection, resin content, water pressure resistance height, water-fast mist, folding resistance, a series of indexs such as temperature tolerance and application life.The General Requirements of filter paper is that flow resistance is as far as possible little, also is that air permeability is as far as possible large, and dust capaciting ability is as far as possible large.According to the introduction of " strainer manufacture and design and use (Chemical Industry Press) " book, in the world to applying unit and the disunity of air permeability.The present more use of domestic mechanical filter paper manufacturing enterprise (Δ P200Pa) L/m2/s.Filter paper does not belong to the sound absorption material of building acoustics Material Field.
Known, Concertina fold is the terms of bookbinding binding and layout industry, refer to a kind of with paper by the continuous paper folding that repeatedly gives a discount and form, because its likeness in form organ bellows are gained the name.The discounting lines of Concertina fold are called the Zhe line, and the Zhe line that it protrudes outside page is called crest line, and the Zhe line that is recessed at page is called valley line.Concertina fold is called folding face by a Zhe line to the part another Zhe line, and its Zhe line is called the folding page length to the length of Zhe line, generally will roll over the long Concertina fold of page length and be called great organ Zhe, and length is short is called harmonium Zhe.The Concertina fold side-looking is the continuous triangle shape, and its each angle is called the Zhe point, and the Zhe point also comprises circular Zhe point.The line that Concertina fold exists together between two adjacent Zhe points of a side is called base portion, and it is high to the Zhe that the vertical line of opposite side base portion is called Concertina fold by side Zhe point.Concertina fold generally refers to be the Concertina fold of stretch-like.When Concertina fold extends in various degree, the angle of its Zhe point, the length of base portion, the height that Zhe is high, the spatial volume between Zhe and the Zhe all changes corresponding.Concertina fold inwardly can be received Zhe, even Zhe and Zhe are adjacent to, and makes its whole volume become very little.
" noise and vibration control project handbook (China Machine Press) " book is pointed out: the gas permeability of material can be used this Parametric Representation of flow resistance, and flow resistance is that air particle is by the resistance of material void.The definition of flow resistance is under stable stream condition, the ratio of the barometric gradient of sound absorption material and the linear velocity of air-flow, and its unit is every meter of second of handkerchief (Pas/m); The flow resistance of unit thickness is called the flow resistivity of material, and unit is every square metre of second of handkerchief (Pas/m2).In general, the poorer then flow resistance of the gas permeability of material is higher, and the better then flow resistance of gas permeability is lower.For low flow-resistant material, its low-frequency range sound absorption is very low, and after a certain medium-high frequency section, curve can suddenly rise with larger slope; High flow-resistant material is compared with low flow-resistant material, and the high frequency sound absorption coefficient obviously descends, and the Low Medium Frequency sound absorption coefficient promotes to some extent.To certain thickness porous material, its relatively reasonable flow resistance is roughly between 100～1600Pas/m.The material flow resistance is too high to cause the air penetration reduction, or flow resistance is excessively low lacks viscid frictional force, all will make the sound absorption variation of material.
Data when " thin fiber layer vibration sound absorption is theoretical " book is furnished with rear cavity according to actual measurement fabric or nonwoven point out that the sound absorption of viscid sound absorption and tubule is theoretical inapplicable to the thin fiber layer that rear cavity is arranged." Reduction Analysis (National Defense Industry Press) " book has stated that sound is a kind of energy that fluctuates and transmit, it can be on the sound absorption material surface because of stickiness, the interaction on the inflate compression of gas and solid material border, the reasons such as heat conduction, form approximately 0.22 millimeter glutinous thermal boundary layer, the acoustic energy that glutinous thermal boundary layer consumes is larger.
Synthetically say: although the 1. unhygienic not environmental protection of glass wool material, because its sound absorption property and economy are very excellent, so it is still the first-selected sound absorption material of building acoustics engineering so far, consumption is very big.2. glass wool class material also has volume larger, the defectives such as accumulating inconvenience except the defective of unhygienic not environmental protection.3. microperforated panel is more expensive because of cost, and the peak valley of Sound absorbing spectrum changes greatly, and high frequency sound absorption property is relatively poor, be mainly used in non-clean can not the ventilating engineering noise reduction.4. the sound absorption of viscid sound absorption and tubule is theoretical inapplicable to the thin fiber layer that rear cavity is arranged.5. the glutinous thermal boundary layer on sound absorption material surface can consume larger acoustic energy than material internal.6. the low frequency absorption of low flow-resistant material is poor, and the high frequency sound absorption is relatively better; The high frequency sound absorption of high flow-resistant material is poor, and the Low Medium Frequency sound absorption promotes to some extent.7. the building acoustics engineering selects sound absorption material still to be as the criterion with actual measurement at present.Judge that a kind of sound absorption material is technical whether creative, whether progress, measured data is its unique test stone.
So if a kind of new sound absorption material occurs now, it possesses the advantage of hygienic environment-protecting on the one hand, simultaneously sound absorbing capabilities and manufacturing cost be again near the glass wool material, and lightweight, and accumulating is convenient.It will change sound absorbent for building have to now use the in a large number situation of glass wool so.This is a major issue that is related to the sound absorbent for building development.
Data Visible "practical architectural acoustic design technology (China Building Industry Press)," "Building insulation materials with sound-absorbing material (Chemical Industry Press)," "noise control technology and its new progress (Metallurgical Industry Press)," "Acoustic manual (Science Press), "and papers" micro-perforated plate acoustic structure and its applications (Noise and Vibration Control) "" combined micro-perforated panel absorber structure (Noise and Vibration Control) "" thickness and density on the acoustic performance effects (Tianjin Polytechnic University), "" micro-perforated absorber flat space theoretical Analysis (Journal of Acoustics), "" multi-micro-perforated plate optimization (noise control), "" non-woven fabric structure and its absorption performance studies (textiles) "" specialty Paper (chemical Industry Press), "" post-processing of paper and paperboard (China light Industry Press), "" outlook, attractive paper flame retardant material (Hubei paper) "" Environment Engineering Materials (chemical Industry Press). "
The utility model content
The technical problems to be solved in the utility model provides a kind of sound absorbing capabilities near the solid glass cotton material of stack pile, hygienic environment-protecting, the accumulating volume is very little, and is lightweight, the sound absorption material that cost is low.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of sound absorption material, comprise that thickness is less than 1.2 millimeters, porosity is less than 85% fibrous porous material sheet, described sound absorption material is comprised of the fibrous porous material sheet of Concertina fold shape of two-layer at least Concertina fold folding page length greater than 12 millimeters, the fibrous porous material sheet of its Concertina fold shape has average pore size less than 0.16 millimeter micropore, the fibrous porous material sheet of described each layer Concertina fold shape part Concertina fold crest line and part Concertina fold valley line each other links together, formation is the sound absorption aspect by the fibrous porous material sheet of Concertina fold shape, triangle space is the resonance sound-absorbing cavity between each Zhe of Concertina fold, the sound absorption material with Concertina fold structure.Adopt this structure, the one, multiple sound absorption mechanism can be combined: first. the micropore size of thin material is very little, and quantity is a lot, is conducive to sound absorption; Second. sandwich construction makes the friction viscous in the projected area. the thin material vibration. the real area of glutinous thermal boundary layer is multiplied, and is conducive to sound absorption; Third. the flow resistance of individual layer thin material is low, is beneficial to the high frequency sound absorption; The thin material of successively connecting is increased flow resistance, is beneficial to the medium and low frequency sound absorption; Fourth. cavity volume is larger, and cavity is the gradual change triangle, is conducive to the broadening sound sucting band, makes Sound absorbing spectrum straight.Actual measurement shows that its sound absorbing capabilities has reached the sound absorbing capabilities of stack pile solid glass cotton material really.The 2nd, the Concertina fold of structure, it not only can the compression material volume, makes things convenient for accumulating, and can utilize modes such as changing Concertina fold expansion degree, adjusts the size of cavity volume and shape, improves sound absorbing capabilities.
As a kind of improvement of the present utility model, sound absorption material described in the utility model can be comprised of the Concertina fold shape fibrous porous material sheet of three layers of Concertina fold folding page length greater than 17.5 millimeters, the Concertina fold folding page length of the fibrous porous material sheet of its middle one deck Concertina fold shape is longer than the Concertina fold of the fibrous porous material sheet of other two-layer Concertina fold shape and is rolled at least 7.5 millimeters of page lengths, the Concertina fold crest line of the fibrous porous material sheet of one deck Concertina fold shape and the Concertina fold valley line of the fibrous porous material sheet of other two-layer Concertina fold shape link together in the middle of described, formation is the sound absorption aspect by the fibrous porous material sheet of Concertina fold shape, triangle space is the resonance sound-absorbing cavity between each Zhe of Concertina fold, the sound absorption material with Concertina fold structure.
As another kind of improvement the of the present utility model, sound absorption material described in the utility model can be comprised of the fibrous porous material sheet of Concertina fold shape of 20 millimeters of three layers Concertina fold folding page lengths at least at least, the Concertina fold folding page length of the fibrous porous material sheet of its each layer Concertina fold shape differs at least 10 millimeters, the fibrous porous material sheet of described each layer Concertina fold shape is arranged sequentially according to the length of Concertina fold folding page length, crest line and the valley line of its Concertina fold link together, formation is the sound absorption aspect by the fibrous porous material sheet of Concertina fold shape, triangle space is the resonance sound-absorbing cavity between each Zhe of Concertina fold, the sound absorption material with Concertina fold structure.Adopt this improvement can form some open spaces, increase the diversity of sound absorption construction, the degree of depth of cavity after especially deepening.
Another improvement of the present utility model, be the fibrous porous material sheet of described Concertina fold shape can be thickness less than 0.8 millimeter, average pore size is less than 0.14 millimeter string filter paper.Adopt string filter paper to be that it possesses the material hygienic environment-protecting simultaneously, micropore is again little and sound absorption property good more, and the cheap especially advantage of cost.
Another improvement of the present utility model, be the fibrous porous material sheet of described Concertina fold shape can be thickness less than 1.2 millimeters, average pore size is less than 0.14 millimeter nonwoven.
Further improvement of the present utility model, be the fibrous porous material sheet of described Concertina fold shape can be thickness less than 1.2 millimeters, average pore size is less than 0.16 millimeter thin metal fiber wire filter paper.Adopt not only hygienic environment-protecting of thin metal fiber wire filter paper, sound absorption property is good, and does not fire.
The utility model utilizes multi-layer microporous fibre thin layer to add the complex sound impedance structure sound absorption of a plurality of gradual change triangle resonating cativties, and actual measurement shows that its sound absorbing capabilities is very excellent: the noise reduction coefficient of measuring with standing-wave-tube method has reached 0.84; The average sound absorption coefficient of measuring with Reverberation room method has reached 0.96, and the sound absorption coefficient in 400～5000 weeks can remain on more than 0.99, reached stack pile the sound absorbing capabilities level of solid glass cotton material; The utility model can be made with cheap materials of hygienic environment-protecting low-carbon (LC) such as string filter paper, has solved people and has wished for many years to solve the sound absorption material non-glass fibre problem that but always fails; At least 20 times of the Concertina fold structure energy compression volumes that the utility model adopts have greatly made things convenient for Warehousing; The utility model utilizes cavity to save materials, and is lightweight, and cost is low.The utility model has reached provides the solid glass cotton material of a kind of sound absorbing capabilities near stack pile, hygienic environment-protecting, the accumulating volume is very little, and is lightweight, the purpose of the sound absorption material that cost is low.
Below in conjunction with accompanying drawing the utility model is done further concrete the introduction.
Description of drawings
Fig. 1 is the schematic diagram of the first embodiment of the present utility model.
Fig. 2 is the schematic cross-section of the first embodiment of the present utility model.
Fig. 3 is the schematic cross-section after the first embodiment of the present utility model receives Zhe.
Fig. 4 is the schematic cross-section of the second embodiment of the present utility model.
Fig. 5 is the sound absorption coefficient performance diagram that the utility model is measured with standing-wave-tube method.
Fig. 6 is the sound absorption coefficient performance diagram that the utility model is measured with Reverberation room method.
Specific embodiments
Such as Fig. 1. shown in Figure 2, the first embodiment is comprised of three layers of fibrous porous material sheet 1 of Concertina fold shape, 2,3, the fibrous porous material sheet 1 of its Concertina fold shape, the 2, the 3rd is with 0.55 millimeter of thickness, grammes per square metre 130 grams, 0.11 millimeter of average pore size, air permeability 780L/m2/s's, the fire-retardant filter paper that width is 600 millimeters is raw material, is made the Concertina fold goods of Zhe line 9 by folded machine.Wherein, the fibrous porous material sheet 1 of Concertina fold shape, 3 Concertina fold folding page length are 25 millimeters, and the Concertina fold folding page length of the fibrous porous material sheet 2 of Concertina fold shape is 50 millimeters.Such as figure, the crest line position 4 of the protrusion of the fibrous porous material sheet 2 of Concertina fold shape and the fibrous porous material sheet 1 of Concertina fold shape, 3 recessed valley line position 5,6 bond together, formation has the sound absorption material with complex sound impedance structure 8 of a plurality of gradual-change cavities 7 take the fibrous porous material sheet 1 of Concertina fold shape, 2,3 as the sound absorption aspect between the sound absorption aspect.
As shown in Figure 3, after the first embodiment utilized the received Zhe property receipts Zhe of Concertina fold, the fibrous porous material sheet 1 of its Concertina fold shape, 2,3 mutually close had reduced the volume of cavity 7 greatly, had reached that convenience stores and the purpose of transportation.
Use the first embodiment method a lot, such as substituting installation by existing same processes with the mounting glass cotton---at metope vertical keel and horizontal keel are installed, at the bonding laying sound absorption material 8 of vertical top of keel, at horizontal top of keel the perforation decoration panel is installed again, can finish construction.
With reference to shown in Figure 4, the second embodiment is comprised of four layers of fibrous porous material sheet 11 of Concertina fold shape, 12,13,14, the fibrous porous material sheet 11 of its Concertina fold shape, the 12,13, the 14th is with 0.55 millimeter of thickness, grammes per square metre 130 grams, 0.11 millimeter of average pore size, air permeability 780L/m2/s's, the fire-retardant filter paper that width is 600 millimeters is raw material, the Concertina fold goods of being made by folded machine.The fibrous porous material sheet 11 of described Concertina fold shape, 12,13,14 Concertina fold folding page length are respectively 50 millimeters, and 40 millimeters, 30 millimeters, 20 millimeters.Such as figure, the mode that crest line 17 that the fibrous porous material sheet 11 of Concertina fold shape, 12,13,14 is pressed one deck thin slice and the valley line of another layer thin slice 18 are mutually bonding, bond together successively, formation has the sound absorption material with complex sound impedance structure 19 of a plurality of cavitys 16 take the fibrous porous material sheet 11 of Concertina fold shape, 12,13,14 as aspect between the aspect.The one side of sound absorption material 19 is the cavitys 15 that are open shape.
The usage of cavity 15 can have three kinds at least: one. and be positioned at the rear of microperforated panel when sound absorption material 19, and its cavity 15 is when sound source, cavity 15 can provide the gradual-change cavity of certain depth; Two. with the cavity 15 of sound absorption material 19 dorsad sound source be paved on the keel, cavity 15 can be deepened the degree of depth of original cavity, and sound absorption is moved towards lower frequency band; Three. with the cavity 15 of sound absorption material 19 sound source dorsad, directly be adhered to metope and use.
Shown in Figure 5 is according to GB GB/T18696.2-2002 (measurement of sound absorption coefficient and acoustic impedance in the acoustic impedance pipe, part 2: transfer function method), use Denmark B﹠amp; K PULS3560C acoustic analysis instrument, 4206 impedance tubes and corollary equipment thereof are tested sound absorption coefficient performance diagram of the present utility model.
Shown in Figure 6 is to test sound absorption coefficient performance diagram of the present utility model with Reverberation room method.
Claims (6)
1. sound absorption material, comprise that thickness is less than 1.2 millimeters, porosity is less than 85% fibrous porous material sheet, it is characterized in that described sound absorption material is comprised of the fibrous porous material sheet of Concertina fold shape of two-layer at least Concertina fold folding page length greater than 12 millimeters, the fibrous porous material sheet of its Concertina fold shape has average pore size less than 0.16 millimeter micropore, the fibrous porous material sheet of described each layer Concertina fold shape part Concertina fold crest line and part Concertina fold valley line each other links together, formation is the sound absorption aspect by the fibrous porous material sheet of Concertina fold shape, triangle space is the resonance sound-absorbing cavity between each Zhe of Concertina fold, the sound absorption material with Concertina fold structure.
2. by a kind of sound absorption material claimed in claim 1, it is characterized in that described sound absorption material is comprised of the fibrous porous material sheet of Concertina fold shape of three layers of Concertina fold folding page length greater than 17.5 millimeters, the Concertina fold folding page length of the fibrous porous material sheet of its middle one deck Concertina fold shape is longer than the Concertina fold of the fibrous porous material sheet of other two-layer Concertina fold shape and is rolled at least 7.5 millimeters of page lengths, the Concertina fold crest line of the fibrous porous material sheet of one deck Concertina fold shape and the Concertina fold valley line of the fibrous porous material sheet of other two-layer Concertina fold shape link together in the middle of described, formation is the sound absorption aspect by the fibrous porous material sheet of Concertina fold shape, triangle space is the resonance sound-absorbing cavity between each Zhe of Concertina fold, the sound absorption material with Concertina fold structure.
3. by a kind of sound absorption material claimed in claim 1, it is characterized in that the fibrous porous material sheet of Concertina fold shape that described sound absorption material is rolled at least 20 millimeters of page lengths by at least three layers Concertina fold forms, the Concertina fold folding page length of the fibrous porous material sheet of its each layer Concertina fold shape differs at least 10 millimeters, the fibrous porous material sheet of described each layer Concertina fold shape is arranged sequentially according to the length of Concertina fold folding page length, crest line and the valley line of its Concertina fold link together, formation is the sound absorption aspect by the fibrous porous material sheet of Concertina fold shape, triangle space is the resonance sound-absorbing cavity between each Zhe of Concertina fold, the sound absorption material with Concertina fold structure.
4. by a kind of sound absorption material claimed in claim 1, it is characterized in that the fibrous porous material sheet of described Concertina fold shape be thickness less than 0.8 millimeter, average pore size is less than 0.14 millimeter string filter paper.
5. by a kind of sound absorption material claimed in claim 1, it is characterized in that the fibrous porous material sheet of described Concertina fold shape be thickness less than 1.2 millimeters, average pore size is less than 0.14 millimeter nonwoven.
6. by a kind of sound absorption material claimed in claim 1, it is characterized in that the fibrous porous material sheet of described Concertina fold shape be thickness less than 1.2 millimeters, average pore size is less than 0.16 millimeter thin metal fiber wire filter paper.
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| CN 201220200777 CN202658756U (en) | 2012-05-04 | 2012-05-04 | Sound absorption material |
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| CN 201220200777 CN202658756U (en) | 2012-05-04 | 2012-05-04 | Sound absorption material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161089A (en) * | 2015-06-17 | 2015-12-16 | 成都斯铂润音响设备有限公司 | Sound absorbing device |
| CN107700686A (en) * | 2017-09-21 | 2018-02-16 | 江苏声立方环保科技有限公司 | Felt and its manufacture method |
| CN109671419A (en) * | 2018-12-28 | 2019-04-23 | 西安交通大学 | One kind is cracked basis of dual porosity rate sound absorber and its application |
| CN110473513A (en) * | 2019-08-07 | 2019-11-19 | 西北工业大学 | A kind of slit Meta Materials acoustic interlayer plate |
| CN110619865A (en) * | 2019-10-09 | 2019-12-27 | 西北工业大学 | Film multi-cavity material with excellent sound absorption performance |
| CN116497959A (en) * | 2023-04-28 | 2023-07-28 | 威海克莱特菲尔风机股份有限公司 | Perforated roll paper structure with high sound absorption performance and preparation method |
-
2012
- 2012-05-04 CN CN 201220200777 patent/CN202658756U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161089A (en) * | 2015-06-17 | 2015-12-16 | 成都斯铂润音响设备有限公司 | Sound absorbing device |
| CN105161089B (en) * | 2015-06-17 | 2019-10-15 | 成都斯铂润音响设备有限公司 | A kind of sound absorber |
| CN107700686A (en) * | 2017-09-21 | 2018-02-16 | 江苏声立方环保科技有限公司 | Felt and its manufacture method |
| CN107700686B (en) * | 2017-09-21 | 2023-04-25 | 江苏声立方环保科技有限公司 | Sound absorption and insulation board and manufacturing method thereof |
| CN109671419A (en) * | 2018-12-28 | 2019-04-23 | 西安交通大学 | One kind is cracked basis of dual porosity rate sound absorber and its application |
| CN109671419B (en) * | 2018-12-28 | 2024-01-12 | 西安交通大学 | Slotting double-porosity sound absorption device and application thereof |
| CN110473513A (en) * | 2019-08-07 | 2019-11-19 | 西北工业大学 | A kind of slit Meta Materials acoustic interlayer plate |
| CN110619865A (en) * | 2019-10-09 | 2019-12-27 | 西北工业大学 | Film multi-cavity material with excellent sound absorption performance |
| CN110619865B (en) * | 2019-10-09 | 2023-08-15 | 西北工业大学 | Film multi-cavity material with excellent sound absorption performance |
| CN116497959A (en) * | 2023-04-28 | 2023-07-28 | 威海克莱特菲尔风机股份有限公司 | Perforated roll paper structure with high sound absorption performance and preparation method |
| CN116497959B (en) * | 2023-04-28 | 2024-03-29 | 威海克莱特菲尔风机股份有限公司 | Perforated roll paper structure with high sound absorption performance and preparation method |
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