CN211350095U - Ultra-thin sound absorption structure - Google Patents
Ultra-thin sound absorption structure Download PDFInfo
- Publication number
- CN211350095U CN211350095U CN201922083487.5U CN201922083487U CN211350095U CN 211350095 U CN211350095 U CN 211350095U CN 201922083487 U CN201922083487 U CN 201922083487U CN 211350095 U CN211350095 U CN 211350095U
- Authority
- CN
- China
- Prior art keywords
- sound absorption
- film
- nonporous
- sound
- thin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to the technical field of acoustics, in particular to an ultrathin sound absorption structure, which is characterized in that the front surface of a nonporous sound absorption film is a plane, and the back surface of the nonporous sound absorption film is provided with a concavo-convex shape so that the nonporous sound absorption film comprises a thicker part and a thinner part; the thickness of the thin part (the acoustic functional part) is 0.01-0.1 mm, sound waves can penetrate through the thin film through the thin part, and the characteristics of wide acoustic sound absorption frequency band and good sound absorption effect are realized by combining the back cavity and the sound absorption material; meanwhile, the nonporous sound absorption film has no pores, is smooth and flat, has no fiber leakage, does not gather dust or breed bacteria, can be wiped and cleaned, and can be further applied to the use environments with high cleanliness requirements, such as medicines, foods, electronics and the like.
Description
Technical Field
The utility model relates to an acoustics technical field especially relates to an ultra-thin sound absorption structure.
Background
The commonly used sound absorption materials at present are mainly porous fiber materials, such as sound absorption materials made of superfine glass fiber cotton, rock wool boards, polyester fiber cotton, melamine foam, aluminum fiber boards, foamed aluminum and the like, and the common characteristics of the materials are that the materials have a loose porous structure. The structure enables sound waves to enter the interior of the structure, and the sound energy is converted into heat energy through vibration and friction of air molecules in gaps of the structure, so that the sound energy is weakened or consumed, and the purposes of sound absorption, noise reduction and sound field control are achieved. However, due to its own porous property, many hidden troubles are caused, for example, the sound-absorbing material is easy to gather dust and breed bacteria, the fiber is broken and separated for a long time, and is scattered in the air to form secondary pollution, which is not good for production and personnel safety.
In some special industries, such as food, medical, pharmaceutical, biological, material, electronic, aerospace and other fields, the requirement for environmental cleanliness is high, and the porous sound absorption material is not allowed to be used. It is very difficult to eliminate the direct noise and the reflected noise in these areas, and in most cases, the damage caused by high noise pollution has to be endured, so that the hearing is reduced, the mood is irritated, the working efficiency is reduced, and the product quality accident and the safety accident are easy to occur. For the above situations, no good noise reduction method exists at present; this is undesirable to those skilled in the art.
SUMMERY OF THE UTILITY MODEL
To the problem that exists, the utility model discloses an ultra-thin sound absorption structure to solve some at present and require very high trades to the cleanliness factor of environment, owing to can't adopt porousness sound absorbing material sound absorption, people have to endure the harm that high noise pollution brought under most of the circumstances, not only make hearing decline, mood dysphoria, work efficiency reduce, but also easily produce the problem of product quality accident and incident.
An ultra-thin sound absorbing structure, wherein the sound absorbing structure is fixedly installed on an acoustic installation surface and forms a cavity with the acoustic installation surface, and the sound absorbing structure comprises a non-porous sound absorbing film;
the nonporous sound absorption film is provided with a front surface and a back surface opposite to the front surface, the front surface is the surface facing to the outside when the nonporous sound absorption film is installed, the front surface is a plane, and the back surface of the nonporous sound absorption film is provided with a concavo-convex shape so that the nonporous sound absorption film comprises a thicker part and a thinner part;
wherein the thickness of the thin part is 0.01-0.1 mm, and the thickness of the thick part is 0.2-5.0 mm.
In the ultrathin sound absorption structure, the area of the thin part accounts for 1-95% of the total area of the nonporous sound absorption film.
In the ultrathin sound absorption structure, the material of the nonporous sound absorption film includes metal, a polymer material or any one of the metal and the polymer material.
In the ultrathin sound absorption structure, the metal is stainless steel, aluminum, copper, iron or alloy.
In the ultrathin sound absorption structure, the nonporous sound absorption film is a rolled film.
The ultrathin sound absorbing structure as described above, wherein the nonporous sound absorbing film comprises a perforated film and a nonporous film covering the perforated film.
The ultrathin sound absorption structure is C-shaped, n-shaped, box-shaped or buckle-plate-shaped.
In the ultrathin sound absorption structure, the sound absorption cotton is placed in the cavity.
Above-mentioned utility model has following advantage or beneficial effect:
the utility model discloses an ultra-thin sound absorption structure, the front surface of a nonporous sound absorption film is a plane, and the back surface of the nonporous sound absorption film is provided with a concavo-convex shape so that the nonporous sound absorption film comprises a thicker part and a thinner part; the thickness of the thin part (the acoustic functional part) is 0.01-0.1 mm, sound waves can penetrate through the thin film through the thin part, and the characteristics of wide acoustic sound absorption frequency band and good sound absorption effect are realized by combining the back cavity and the sound absorption material; meanwhile, the nonporous sound absorption film has no pores, is smooth and flat, has no fiber leakage, does not gather dust or breed bacteria, can be wiped and cleaned, and can be further applied to the use environments with high cleanliness requirements, such as medicines, foods, electronics and the like.
Drawings
The invention and its features, aspects and advantages will become more apparent from a reading of the following detailed description of non-limiting embodiments with reference to the attached drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
FIG. 1 is a cross-sectional view of a nonporous sound absorbing film in accordance with an embodiment of the present invention;
fig. 2 is a schematic structural view of a C-shaped ultrathin sound absorption structure in a first embodiment of the present invention;
fig. 3 is an installation schematic view of a C-shaped ultrathin sound absorption structure in a first embodiment of the present invention;
fig. 4 is a schematic structural view of a "ji" shaped ultra-thin sound absorbing structure according to an embodiment of the present invention;
fig. 5 is an installation schematic view of a n-shaped ultrathin sound absorption structure in the first embodiment of the present invention;
fig. 6 is a cross-sectional view of a nonporous sound absorbing film according to a second embodiment of the present invention.
Detailed Description
The utility model discloses an ultra-thin sound absorption structure, which is fixedly arranged on an acoustic installation surface and forms a cavity with the acoustic installation surface, and comprises a non-porous sound absorption film; the nonporous sound absorption film is provided with a front surface and a back surface opposite to the front surface, the front surface is the surface facing to the outside when the nonporous sound absorption film is installed, the front surface is a plane, and the back surface of the nonporous sound absorption film is provided with a concavo-convex shape so that the nonporous sound absorption film comprises a thicker part and a thinner part; the thickness of the thin part is 0.01-0.1 mm, the thickness of the thick part is 0.2-5.0mm, the ultrathin sound absorption structure is free of pores and can be wiped dry or wet, the thickness of the sound absorption part is in a micron order, and the ultrathin sound absorption structure has a good effect on resistive absorption and resonance absorption of full-frequency band sound waves, so that the use requirements of a high-cleanness environment can be completely met in material and structure, and an effective and feasible solution is provided for solving the problem of large noise pollution in the high-cleanness environment.
The present invention will be further described with reference to the accompanying drawings and specific examples, which should not be construed as limiting the invention.
Example one
As shown in fig. 1 to 5, the present embodiment relates to an ultra-thin sound absorbing structure, and in particular, the sound absorbing structure is fixedly mounted on an acoustic mounting surface 12 (the acoustic mounting surface 12 is a mounting top surface or a mounting wall surface to which the sound absorbing structure is to be mounted, etc.) and a cavity 13 is formed between the acoustic mounting surface 12 and the sound absorbing structure, and the sound absorbing structure includes a non-porous sound absorbing film 11, and the non-porous sound absorbing film 11 is a rolled film, that is, a film formed by a rolling process; the nonporous sound absorbing film 11 has a front surface 111 and a rear surface 112 disposed opposite to the front surface 111, the front surface 112 is a surface of the nonporous sound absorbing film 11 facing outward when mounted, and the front surface 112 is a flat surface, and the rear surface 112 of the nonporous sound absorbing film 11 has a concavo-convex shape such that the nonporous sound absorbing film 111 includes a thick portion and a thin portion, wherein the thin portion has a thickness of 0.01 to 0.1mm (e.g., 0.01mm, 0.03mm, 0.05mm, or 0.1mm, etc.) to form an acoustically functional portion through which sound waves can pass through the film, and the thick portion has a thickness of 0.2 to 5.0mm (e.g., 0.2mm, 1mm, 2.6mm, or 5mm, etc.) to form a structural strength portion of the nonporous sound absorbing film 11.
Specifically, the area of the thin portion accounts for 1 to 95% of the total area of the nonporous sound absorption film 11, so that a good sound absorption effect can be achieved.
In the embodiment of the present invention, the sound absorption structure may be a C-shaped (such as the structure shown in fig. 2 and 3) or a n-shaped (such as the structure shown in fig. 4 and 5), specifically, the C-shaped sound absorption structure 11 is fixed on the acoustic installation surface 12 by a hanging plate type fixing member 14 to form a cavity 13 with the acoustic installation surface 12, and the n-shaped sound absorption structure 11 is fixed on the acoustic installation surface 12 by a fastening member 14 to form a cavity 13 with the acoustic installation surface 12; of course, in other embodiments of the present invention, the sound absorption structure may be a box type or a buckle type, which does not affect the purpose of the present invention.
Preferably, the material of the non-porous sound absorption film 11 may include metal, polymer material or any one of the two, wherein the metal is stainless steel, aluminum, copper, iron or alloy.
Preferably, sound absorption cotton is placed in the cavity 13, so that the sound absorption structure has a better sound absorption effect.
Example two
As shown in fig. 6, this embodiment is substantially the same as the first embodiment except that the non-porous sound-absorbing film 21 includes a perforated film 211 and a non-porous film 212 covering the perforated film 211, the perforated film 211 is located on the back side of the non-porous sound-absorbing film, and the non-porous film 212 faces the outside (on the front side of the non-porous sound-absorbing film 21), and since the non-porous sound-absorbing film 21 includes the perforated film 211 having a plurality of through holes 2111, the non-porous sound-absorbing film 21 has a concavo-convex shape, and the non-porous sound-absorbing film 21 includes a thicker portion (including the thickness of the non-porous film 212 and the perforated film 211) and a thinner portion (including the thickness of the non-porous film 212 only) where the perforated film 211 has holes; wherein the thin portion has a thickness of 0.01 to 0.1mm (e.g., 0.01mm, 0.03mm, 0.05mm, or 0.1mm, etc.) to form an acoustically functional portion through which sound waves can pass through the non-porous film 212, and the thick portion has a thickness of 0.2 to 5.0mm (e.g., 0.2mm, 1mm, 2.6mm, or 5mm, etc.) to form a structural strength portion of the non-porous sound absorbing film 21.
Preferably, the non-porous film 212 and the perforated film 211 may be made of the same material (for example, a metal or a polymer material), or may be made of a composite of two or more materials. The nonporous sound absorption film 21 can be realized by different industrial methods such as welding, gluing, crimping, vapor deposition and the like.
To sum up, the utility model provides an ultra-thin sound absorption structure of sclausura is through the experimental measurement of specialty, combine the acoustics theory, design suitable ultra-thin plate thickness and area "sound transmissivity", make the sound wave pass the sheet metal almost without the hindrance and realize the sound absorption, acoustics sound absorption frequency band is very wide, all have the sound absorption effect from 20Hz ~ 20KHz, average sound absorption coefficient reaches 0.90, and simultaneously, because the sound absorption film surface does not have the hole, do not gather the dust, do not breed the bacterium, can clean, can satisfy medicine, food, the service environment that has high cleanliness requirement such as electron.
Those skilled in the art will appreciate that variations may be implemented by those skilled in the art in combination with the prior art and the above-described embodiments, and will not be described herein in detail. Such variations do not affect the essence of the present invention, and are not described herein.
The above description is directed to the preferred embodiment of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that devices and structures not described in detail are understood to be implemented in a manner common in the art; without departing from the scope of the invention, it is intended that the present invention shall not be limited to the above-described embodiments, but that the present invention shall include all the modifications and variations of the embodiments. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still fall within the protection scope of the technical solution of the present invention, where the technical entity does not depart from the content of the technical solution of the present invention.
Claims (8)
1. An ultrathin sound absorption structure is characterized in that the sound absorption structure is fixedly arranged on an acoustic installation surface, a cavity is formed between the sound absorption structure and the acoustic installation surface, and the sound absorption structure comprises a nonporous sound absorption film;
the nonporous sound absorption film is provided with a front surface and a back surface opposite to the front surface, the front surface is the surface facing to the outside when the nonporous sound absorption film is installed, the front surface is a plane, and the back surface of the nonporous sound absorption film is provided with a concavo-convex shape so that the nonporous sound absorption film comprises a thicker part and a thinner part;
wherein the thickness of the thin part is 0.01-0.1 mm, and the thickness of the thick part is 0.2-5.0 mm.
2. The ultra-thin sound absorbing structure of claim 1, wherein the area of the thinner portion is 1 to 95% of the total area of the nonporous sound absorbing film.
3. The ultra-thin sound absorbing structure of claim 1, wherein the non-porous sound absorbing film comprises a metal, a polymeric material, or any of the two.
4. The ultra-thin sound absorbing structure of claim 3 wherein the metal is stainless steel, aluminum, copper, iron, or an alloy.
5. The ultra-thin sound absorbing structure of claim 1 wherein the nonporous sound absorbing film is a calendered film.
6. The ultra-thin sound absorbing structure of claim 1 wherein the non-porous sound absorbing film comprises a perforated film and a non-porous film overlying the perforated film.
7. The ultra-thin sound absorbing structure of claim 1, wherein the sound absorbing structure is C-shaped, a matrix, a box, or a clip.
8. The ultra-thin sound absorbing structure of claim 1 wherein sound absorbing cotton is placed within the cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922083487.5U CN211350095U (en) | 2019-11-27 | 2019-11-27 | Ultra-thin sound absorption structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922083487.5U CN211350095U (en) | 2019-11-27 | 2019-11-27 | Ultra-thin sound absorption structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211350095U true CN211350095U (en) | 2020-08-25 |
Family
ID=72102497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922083487.5U Active CN211350095U (en) | 2019-11-27 | 2019-11-27 | Ultra-thin sound absorption structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211350095U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345398A (en) * | 2021-06-02 | 2021-09-03 | 湘潭大学 | Full-band sound absorption structure based on microporous film and miniature acoustic black hole structure |
-
2019
- 2019-11-27 CN CN201922083487.5U patent/CN211350095U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345398A (en) * | 2021-06-02 | 2021-09-03 | 湘潭大学 | Full-band sound absorption structure based on microporous film and miniature acoustic black hole structure |
| CN113345398B (en) * | 2021-06-02 | 2022-05-13 | 湘潭大学 | Full-band sound absorption structure based on microporous film and miniature acoustic black hole structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211350095U (en) | Ultra-thin sound absorption structure | |
| JP2007069816A (en) | Double-wall structure | |
| JP2000504120A (en) | Sound absorbing material and methods of making and using this material | |
| CN105587047A (en) | Sound absorption wall | |
| US4068736A (en) | Method and device for reducing noise | |
| CN203910264U (en) | Household appliance composite sound insulating plate and dish washing machine having same | |
| CN108731078B (en) | Range hood with noise filtering function bellows | |
| CN113345398A (en) | Full-band sound absorption structure based on microporous film and miniature acoustic black hole structure | |
| CN204185964U (en) | A kind of sound-absorbing wall | |
| CN203895113U (en) | Composite low frequency resonance sound absorption structure | |
| JP2007303112A (en) | Sliding door for rolling stock | |
| CN203398525U (en) | Noise-reducing and sound-absorbing device for transformer substation | |
| CN204185954U (en) | A kind of sound-absorbing metal plate | |
| CN202401607U (en) | Sound adsorption wedge | |
| CN209540966U (en) | A kind of kitchen ventilator with noise filtering function exhausting component | |
| JP4222244B2 (en) | Outside wall panel of air conditioner | |
| CN108731069B (en) | Range hood with noise filtering function bellows | |
| WO1997008682A1 (en) | Thin metal sheet structure effective for sound damping | |
| CN208379965U (en) | A kind of acoustical panel | |
| CN201111889Y (en) | Novel composite silencer | |
| CN207552954U (en) | Surface configuration and acoustic impedance binary cycle mutation micropunch ultrabroad band sound absorption structure | |
| JP2013088794A (en) | Sound suppressing structure | |
| CN210177721U (en) | Sound-insulation galvanized sheet with sound-insulation and noise-reduction functions | |
| CN202509644U (en) | Sound absorption cellular board | |
| CN105047190A (en) | Ultrathin sound absorption material structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |