CN109801616A - Sound-absorbing material and loudspeaker enclosure with the sound-absorbing material - Google Patents
Sound-absorbing material and loudspeaker enclosure with the sound-absorbing material Download PDFInfo
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- CN109801616A CN109801616A CN201811650145.0A CN201811650145A CN109801616A CN 109801616 A CN109801616 A CN 109801616A CN 201811650145 A CN201811650145 A CN 201811650145A CN 109801616 A CN109801616 A CN 109801616A
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- sound
- absorbing material
- mesoporous
- molecular sieve
- zeolite molecular
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Abstract
The present invention provides a kind of sound-absorbing materials comprising zeolite molecular sieve, if zeolite molecular sieve includes dry particl, particle includes several crystal grain, and crystal grain includes the skeleton and extraframework cation with micropore, and skeleton includes SiO2With the oxide M containing element MxOy；Zeolite molecular sieve further include it is mesoporous, it is mesoporous mesoporous and through the transgranular mesoporous of crystal grain including the intergranular between crystal grain；The atomic molar ratio of Si/M is between 100 to 2000 in skeleton.Compared with the relevant technologies, sound-absorbing material of the invention is applied in loudspeaker enclosure, can significantly improve the low frequency performance of loudspeaker.
Description
[technical field]
The present invention relates to sound-absorbing material technical field, in particular to a kind of sound-absorbing material and the loudspeaking with the sound-absorbing material
Device case.
[background technique]
With the development of science and technology, electronics is increasingly towards miniaturization, the resonance space of speaker system
Also be further compressed, especially mobile phone speaker, it is desirable that be not merely it is small in size have sound, but it is small in size while also need
Good sound quality is provided.
In the related technology, sound-absorbing material is filled in the cavity of loudspeaker enclosure, the sound-absorbing material would generally be using tool
There is the zeolite molecular sieve of a large amount of micropores, air can be made soft the absorption of air and desorption using the zeolite molecular sieve
It measures to be promoted, reduces the resonance frequency of loudspeaker enclosure, the equivalent effect for virtually increasing resonance space is played, to mention
Rise the acoustical behavior of loudspeaker enclosure.
However, in the related art, the specific surface area and Kong Rong of the zeolite molecular sieve are smaller, to the absorbability of air
It is limited, limit the promotion of the loudspeaker acoustical behavior.
Therefore, the loudspeaker enclosure it is really necessary to provide the new sound-absorbing material of one kind and with the sound-absorbing material solves above-mentioned skill
Art problem.
[summary of the invention]
It is an object of the invention to overcome above-mentioned technical problem, a kind of sound-absorbing material and raising with the sound-absorbing material are provided
Sound device case, the sound-absorbing material are applied in loudspeaker enclosure, can significantly improve the low frequency performance of loudspeaker.
To achieve the above object, the present invention provides a kind of sound-absorbing material comprising zeolite molecular sieve, the zeolite molecular sieve
If the particle includes several crystal grain including dry particl, the crystal grain includes the skeleton and extraframework cation with micropore,
The skeleton includes SiO2With the oxide M containing element MxOy；The zeolite molecular sieve further include it is mesoporous, it is described it is mesoporous include institute
It is mesoporous and through the transgranular mesoporous of the crystal grain to state intergranular between crystal grain；The atomic molar ratio of Si/M is 100 in the skeleton
To between 2000.
Preferably, the crystal grain in the sound-absorbing material synthesis process by adding mesoporous template and utilizing soft template
Method is formed.
Preferably, the mesoporous pore size is between 2 nanometers to 40 nanometers.
Preferably, the element M includes at least one of aluminium, iron, boron, titanium, zirconium, gallium, chromium, molybdenum and tin element.
Preferably, the extraframework cation include univalent copper ion, monovalence silver ion, monovalence gold ion, alkali metal from
At least one of son and alkaline-earth metal ions.
Preferably, the extraframework cation introduces to be formed by ion-exchange method.
Preferably, the zeolite molecular sieve includes at least one of MFI, MEL, FER, BEA and MWT.
Preferably, the size of the crystal grain of the zeolite molecular sieve is between 100 nanometers to 10 microns.
Preferably, the crystal grain sieve is shaped to particle by the way that adhesive is added, and the particle size of the particle is 10 microns
To between 1000 microns.
The present invention also provides a kind of loudspeaker enclosures comprising has the shell of accommodating space, is placed in the intracorporal hair of the shell
Sound monomer and the back cavity surrounded by the sounding monomer and shell；The back cavity is filled with sound-absorbing material of the present invention.
Compared with the relevant technologies, the present invention is described mesoporous to provide for the zeolite molecular sieve by the mesoporous introducing
More hole spaces, that is, improve the specific surface area and Kong Rong of the zeolite molecular sieve, so that the zeolite molecular sieve is to gas
The absorbability and adsorbance of body are promoted；Meanwhile when the zeolite molecular sieve is applied to the loudspeaker enclosure, it is described it is mesoporous plus
The diffusion of gas, reduces the damping of the loudspeaker, so that the low frequency for significantly improving the loudspeaker is rung in fast duct
It answers, improves its frequency acoustic performance.
[Detailed description of the invention]
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, in which:
Fig. 1 is the zeolite molecular sieve XRD spectrum that the embodiment of the present invention 1 provides；
Fig. 2 is the zeolite molecular sieve SEM pattern map that the embodiment of the present invention 1 provides；
Fig. 3 is the low temperature nitrogen adsorbance and hole knot of the zeolite molecular sieve of zeolite molecular sieve and the relevant technologies of the invention
Structure comparative bid parameter；
Fig. 4 is the pore-size distribution comparison diagram of the zeolite molecular sieve of zeolite molecular sieve and the relevant technologies of the invention；
Fig. 5 is that the zeolite molecular sieve of the zeolite molecular sieve and the relevant technologies of the invention of varying particle size is low to loudspeaker
The comparison diagram of frequency improvement；
Fig. 6 is loadspeaker structure schematic diagram provided by the invention.
[specific embodiment]
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that the described embodiments are merely a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of sound-absorbing material, and the sound-absorbing material includes zeolite molecular sieve.The zeolite molecular sieve includes
If dry particl, the particle includes several crystal grain, and the crystal grain has the skeleton and extraframework cation of micropore, the skeleton
Including SiO2With the oxide M containing element MxOy；The atomic molar ratio of Si/M is between 100 to 2000 in the skeleton.
Specifically, described mesoporous by adding mesoporous template in the crystal grain synthesis process and utilizing soft template method shape
At.The zeolite molecular sieve further include it is mesoporous, it is described mesoporous mesoporous including the intergranular between the crystal grain and run through the crystal grain
It is transgranular mesoporous；The mesoporous pore size is between 2 nanometers to 40 nanometers.It should be noted that it is international purely with application
It is chemical combined can classification according to the pore size of porous material to porous material, porous material is divided into poromerics (hole track forces
It is very little less than 2 nanometers), (pore size is 50 nanometers for mesoporous material (pore size is between 2 nanometers to 50 nanometers) and large pore material
To between 2000 nanometers), according to above-mentioned classification, the zeolite molecular sieve of the invention is mesoporous material.
The zeolite molecular sieve is in while having the hierarchical porous structure of the described mesoporous and described micropore, by described mesoporous
Introduce, it is described it is mesoporous provide more hole spaces for the zeolite molecular sieve, that is, improve the ratio table of the zeolite molecular sieve
Area and Kong Rong, so that the zeolite molecular sieve promotes the absorbability and adsorbance of gas；Meanwhile when the zeolite molecules
When sieve is applied to the loudspeaker enclosure, the mesoporous diffusion for accelerating gas in duct reduces the damping of the loudspeaker,
To significantly improve the low frequency response of the loudspeaker, improve its frequency acoustic performance.
In the present embodiment, the element M of the zeolite molecular sieve includes aluminium, iron, boron, titanium, zirconium, gallium, chromium, molybdenum and tin
At least one of element, be not limited only to this certainly.Specifically, the element M is aluminium (Al), described in present embodiment
Oxide M containing element MxOyIt is all or part of the oxide of aluminium (Al), the atomic molar of the Si/Al of the zeolite molecular sieve
Than between 100~2000.It should be noted that the atomic molar ratio of Si/Al is higher, the zeolite molecular sieve is formed mesoporous
Quantity it is more,
So that the sound-absorbing effect of the zeolite molecular sieve is more preferably, and then optimize the loudspeaker for applying the zeolite molecular sieve
Frequency acoustic performance.
Further, the zeolite molecular sieve introduces the extraframework cation by ion-exchange method, to obtain
The zeolite molecular sieve of different structure form；The extraframework cation include univalent copper ion, monovalence silver ion, monovalence gold from
At least one of son, alkali metal ion and alkaline-earth metal ions, but range is not limited only to this.By sun outside the skeleton from
The introducing of son, the stability of the zeolite molecular sieve is effectively improved, to improve the loudspeaker using the sound-absorbing material
Stability.
Further, the zeolite molecular sieve includes at least one of MFI, MEL, FER, BEA and MWT.Specifically,
The zeolite molecular sieve can be the molecular sieve of pure phase, i.e., the described zeolite molecular sieve is one in MFI, MEL, FER, BEA and MWT
Kind, for example, in the present embodiment, the zeolite molecular sieve is the molecular sieve of the MFI structure of pure phase.
Certainly, the zeolite molecular sieve may be the molecular sieve of mixed phase, i.e., the described zeolite molecular sieve be MFI and MEL,
The zeolite molecular sieve of the molecular sieve of at least two mixed phase in FER, BEA and MWT, mixed phase has no effect on effect of the invention
Fruit.
It is noted that the particle size of the crystal grain of the zeolite molecular sieve is between 100 nanometers to 10 microns.
Since the particle size of the zeolite molecular sieve is smaller, in actual use, need to be shaped to biggish particle,
It is just suitable for as sound-absorbing material.Specifically, the crystal grain is shaped to particle, the particle size of the particle by the way that adhesive is added
Between 10 microns to 1000 microns, the particle makes the zeolite molecular sieve convenient for being filled into the loudspeaker.Wherein,
The adhesive can be one of inorganic adhesive or organic adhesive.
Embodiment 1
The sound-absorbing material of the present embodiment includes MFI pure phase structure molecular screen, and preparation method is as follows:
With silicon source (at least one of ethyl orthosilicate, silica solution and sodium metasilicate), silicon source (aluminium chloride, aluminum nitrate and sulphur
At least one of sour aluminium), alkali source (at least one of sodium hydroxide, potassium hydroxide, lithium hydroxide and organic base), micropore mould
Version agent is (in 4-propyl bromide, tetrapropylammonium hydroxide, 4-propyl ammonium chloride, n-hexylamine and ethylenediamine and n-butylamine at least
It is a kind of) and water according to the atomic molar of Si/Al than being mixed for 400 original proportion, and progress one hour primary at room temperature
Stirring.
Then soft template (3- aminopropyl triethoxysilane, phenyl triethoxysilane, three ethoxy of chloropropyl are added
In the cationic surfactants such as base silane or cetyl trimethylammonium bromide, dodecyl trimethyl ammonium bromide, TPHAC
It is at least one) carry out two hours secondary agitations；After secondary agitation, had under the high temperature conditions by 7 days crystallizations
There are a large amount of mesoporous zeolite molecular sieve powder, finally by grain forming for having a size of the institute between 800 nanometers to 2 microns
State particle.
As shown in Figure 1, SEM shape appearance figure is as shown in Figure 2 for XRD spectrum with the mesoporous zeolite molecular sieve.
Embodiment 2
Please join shown in Fig. 3-4 simultaneously, the zeolite 1 in figure is the zeolite molecular sieve of the poromerics of the relevant technologies, the boiling
The molecular structure of stone 1 is pure phase MFI structure, and the atomic molar ratio of Si/Al is 400；Zeolite 2 in figure is of the invention mesoporous
The zeolite molecular sieve of material, the zeolite 2 are pure phase MFI structure, and the atomic molar ratio of Si/Al is 400.
The low temperature nitrogen adsorbance of the zeolite molecular sieve of the zeolite molecular sieve of the poromerics and the mesoporous material and
Parameter of pore structure is shown in Fig. 3, it can be seen that the zeolite 2 is compared with the zeolite 1, specific surface area SBETIt is promoted to by 397 ㎡/g
549 ㎡/g, Kong Rong is by 0.25cm3/ g is promoted to 0.39cm3/ g, i.e., the specific surface area and the Kong Rong zeolite 1 of the described zeolite 2
Specific surface area and hole hold improve 38% and 56% respectively so that the zeolite 2 is also obviously improved nitrogen adsorption capacity.
The pore-size distribution of the zeolite molecular sieve of the zeolite molecular sieve of the poromerics and the mesoporous material is shown in Fig. 4, institute
Zeolite 2 is stated other than having a large amount of micropore, is also described mesoporous between 2 nanometers to 40 nanometers with a large amount of apertures；And it is described
Zeolite 1 has a large amount of 0.56 nanometer of micropore, and mesoporous quantity is few.
Embodiment 3
According to the preparation method of above-mentioned sound-absorbing material, in the synthesis process of the crystal grain of the zeolite molecular sieve, lead to
Cross adding proportion be 2.5%, 5% and 10% mesoporous soft template prepare respectively have not the mesoporous zeolite 3 of same amount, boiling
The atomic molar ratio of stone 4 and zeolite 5, the Si/Al of three is 400.By the zeolite 1 of embodiment 2 and the institute of embodiment 3
State zeolite 3, the zeolite 4 and the zeolite 5 be filled in the back cavity of speaker system respectively (tooling back cavity volume be 1 cube
Centimetre, abbreviation 1cc) in carry out acoustical behavior test, the results are shown in Table 1.It should be noted that Q value (quality
It factor) is one group of parameter for describing loudspeaker damped coefficient.
The resonant frequency F before and after different molecular sieve is added in table 1 in loudspeaker back cavity0With Q value
| Zeolite 1 | Zeolite 3 | Zeolite 4 | Zeolite 5 | |
| Resonance frequency of loudspeaker variation delta F0 | 189 | 227 | 251 | 255 |
| Q value changes delta Q | 1.07 | 0.96 | 0.94 | 0.91 |
It can be seen that from the data of table 1 as the mesoporous soft template additive amount increases, the mesoporous amount of introducing also increases
More, the sample specific surface area of synthesis and hole appearance increase are more obvious, and obtained sample mentions the low frequency performance of speaker system
Ascending effect is also all the more obvious；Simultaneously as the mesoporous gas diffusion that can accelerate in duct, so that the Q value of loudspeaker declines, drop
The low damping of loudspeaker, and increasing with mesoporous introduction volume reduce speaker system damping and are just more obvious.
Embodiment 4
According to the preparation method of above-mentioned sound-absorbing material, preparation has mesoporous zeolite 6, and the atomic molar ratio of Si/Al is
400, it is the particle between 10 microns to 1000 microns that the zeolite 6, which is made for particle size,.By the zeolite of embodiment 2
1 and embodiment 4 the zeolite 6 be filled in the back cavity of speaker system respectively (tooling back cavity volume be 1 cubic centimetre,
Abbreviation 1cc) in carry out low-frequency resonance frequency (f0/ Hz) it tests, test result is shown in Fig. 5.
From the results, it was seen that the zeolite 6 and 1 particle size of the zeolite under the same conditions, loudspeaker filling
The frequency acoustic performance of the zeolite 6 is better than filling the zeolite 1 always, and when the particle size of the particle is smaller,
The frequency acoustic performance of loudspeaker is better.
It please refers to shown in Fig. 6, the present invention also provides a kind of loudspeaker enclosures 100 comprising the shell with accommodating space
1, the sounding monomer 2 that is placed in the shell 1 and the back cavity 3 surrounded by the sounding monomer 2 with the shell 1 are described
Fill the sound-absorbing material of the invention in back cavity 3, compliance of the sound-absorbing material to improve back cavity air, so that
The frequency acoustic performance of the loudspeaker 100 is excellent.
Compared with the relevant technologies, the present invention is described mesoporous to provide for the zeolite molecular sieve by the mesoporous introducing
More hole spaces, that is, improve the specific surface area and Kong Rong of the zeolite molecular sieve, so that the zeolite molecular sieve is to gas
The absorbability and adsorbance of body are promoted；Meanwhile when the zeolite molecular sieve is applied to the loudspeaker enclosure, it is described it is mesoporous plus
The diffusion of gas, reduces the damping of the loudspeaker, so that the low frequency for significantly improving the loudspeaker is rung in fast duct
It answers, improves its frequency acoustic performance.
What has been described above is only an embodiment of the present invention, it should be noted here that coming for those of ordinary skill in the art
It says, without departing from the concept of the premise of the invention, improvement can also be made, but these belong to protection model of the invention
It encloses.
Claims (10)
1. a kind of sound-absorbing material comprising zeolite molecular sieve, if the zeolite molecular sieve includes dry particl, if the particle includes
Dry crystal grain, the crystal grain include the skeleton and extraframework cation with micropore, and the skeleton includes SiO2With containing element M
Oxide MxOy, which is characterized in that the zeolite molecular sieve further includes mesoporous, the mesoporous intergranular including between the crystal grain
It is mesoporous and through the transgranular mesoporous of the crystal grain；The atomic molar ratio of Si/M is between 100 to 2000 in the skeleton.
2. sound-absorbing material according to claim 1, which is characterized in that described mesoporous by the crystal grain synthesis process
It adds mesoporous template and is formed using soft template method.
3. sound-absorbing material according to claim 1, which is characterized in that the mesoporous pore size is 2 nanometers to 40 and receives
Between rice.
4. sound-absorbing material according to claim 1, which is characterized in that the element M include aluminium, iron, boron, titanium, zirconium, gallium,
At least one of chromium, molybdenum and tin element.
5. sound-absorbing material according to claim 1, which is characterized in that the extraframework cation include univalent copper ion,
At least one of monovalence silver ion, monovalence gold ion, alkali metal ion and alkaline-earth metal ions.
6. sound-absorbing material according to claim 5, which is characterized in that the extraframework cation passes through ion-exchange method
It introduces and is formed.
7. sound-absorbing material according to claim 1, which is characterized in that the zeolite molecular sieve include MFI, MEL, FER,
At least one of BEA and MWT.
8. sound-absorbing material according to claim 1, which is characterized in that the size of the crystal grain of the zeolite molecular sieve is
Between 100 nanometers to 10 microns.
9. sound-absorbing material according to claim 8, which is characterized in that the crystal grain is shaped to by the way that adhesive is added
Grain, the particle size of the particle are between 10 microns to 1000 microns.
10. a kind of loudspeaker enclosure comprising there is the shell of accommodating space, be placed in the intracorporal sounding monomer of the shell and by described
The back cavity that sounding monomer and shell surround, which is characterized in that the back cavity is filled with as described in any one of claim 1 to 9
Sound-absorbing material.
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| CN201811650145.0A CN109801616A (en) | 2018-12-31 | 2018-12-31 | Sound-absorbing material and loudspeaker enclosure with the sound-absorbing material |
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| CN201811650145.0A CN109801616A (en) | 2018-12-31 | 2018-12-31 | Sound-absorbing material and loudspeaker enclosure with the sound-absorbing material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111204770A (en) * | 2020-01-19 | 2020-05-29 | 上海交通大学 | Sound-absorbing material for improving low-frequency responsiveness of loudspeaker and preparation method thereof |
| CN113044852A (en) * | 2019-12-26 | 2021-06-29 | 镇江贝斯特新材料有限公司 | Hierarchical pore ZSM-5 molecular sieve and preparation method and application thereof |
| CN113816395A (en) * | 2021-09-25 | 2021-12-21 | 深圳职业技术学院 | Hierarchical pore zeolite molecular sieve and preparation method and application thereof |
| CN114999434A (en) * | 2022-07-18 | 2022-09-02 | 镇江贝斯特新材料股份有限公司 | Iron modified acoustic material, preparation method thereof, loudspeaker and electronic equipment |
| CN116102030A (en) * | 2022-12-27 | 2023-05-12 | 瑞声科技（南京）有限公司 | Molecular sieve material for sound absorption and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103098490A (en) * | 2010-08-23 | 2013-05-08 | 楼氏电子亚洲有限公司 | Loudspeaker system with improved sound |
| CN106875934A (en) * | 2017-03-30 | 2017-06-20 | 歌尔股份有限公司 | Metal organic frame sound-absorbing part and sound-producing device module |
| CN107500604A (en) * | 2017-09-21 | 2017-12-22 | 苏州夸克新材料科技有限公司 | A kind of follow-on sound-absorbing material |
| CN108696807A (en) * | 2018-07-28 | 2018-10-23 | 瑞声科技（南京）有限公司 | The loudspeaker enclosure of sound-absorbing material and the application sound-absorbing material |
| CN108996515A (en) * | 2018-07-28 | 2018-12-14 | 瑞声科技（南京）有限公司 | A kind of sound-absorbing material and the loudspeaker enclosure using the sound-absorbing material |
| CN110317083A (en) * | 2019-07-16 | 2019-10-11 | 碗海鹰 | Sound-absorbing material and preparation method thereof and sound-absorbing part |
-
2018
- 2018-12-31 CN CN201811650145.0A patent/CN109801616A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103098490A (en) * | 2010-08-23 | 2013-05-08 | 楼氏电子亚洲有限公司 | Loudspeaker system with improved sound |
| CN106875934A (en) * | 2017-03-30 | 2017-06-20 | 歌尔股份有限公司 | Metal organic frame sound-absorbing part and sound-producing device module |
| CN107500604A (en) * | 2017-09-21 | 2017-12-22 | 苏州夸克新材料科技有限公司 | A kind of follow-on sound-absorbing material |
| CN108696807A (en) * | 2018-07-28 | 2018-10-23 | 瑞声科技（南京）有限公司 | The loudspeaker enclosure of sound-absorbing material and the application sound-absorbing material |
| CN108996515A (en) * | 2018-07-28 | 2018-12-14 | 瑞声科技（南京）有限公司 | A kind of sound-absorbing material and the loudspeaker enclosure using the sound-absorbing material |
| CN110317083A (en) * | 2019-07-16 | 2019-10-11 | 碗海鹰 | Sound-absorbing material and preparation method thereof and sound-absorbing part |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113044852A (en) * | 2019-12-26 | 2021-06-29 | 镇江贝斯特新材料有限公司 | Hierarchical pore ZSM-5 molecular sieve and preparation method and application thereof |
| CN111204770A (en) * | 2020-01-19 | 2020-05-29 | 上海交通大学 | Sound-absorbing material for improving low-frequency responsiveness of loudspeaker and preparation method thereof |
| CN111204770B (en) * | 2020-01-19 | 2023-03-14 | 上海交通大学 | Sound-absorbing material for improving low-frequency responsiveness of loudspeaker and preparation method thereof |
| CN113816395A (en) * | 2021-09-25 | 2021-12-21 | 深圳职业技术学院 | Hierarchical pore zeolite molecular sieve and preparation method and application thereof |
| CN114999434A (en) * | 2022-07-18 | 2022-09-02 | 镇江贝斯特新材料股份有限公司 | Iron modified acoustic material, preparation method thereof, loudspeaker and electronic equipment |
| CN116102030A (en) * | 2022-12-27 | 2023-05-12 | 瑞声科技（南京）有限公司 | Molecular sieve material for sound absorption and preparation method thereof |
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