CN220584923U - Sound absorbing device for treating low-frequency standing waves - Google Patents
Sound absorbing device for treating low-frequency standing waves Download PDFInfo
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- CN220584923U CN220584923U CN202322176203.3U CN202322176203U CN220584923U CN 220584923 U CN220584923 U CN 220584923U CN 202322176203 U CN202322176203 U CN 202322176203U CN 220584923 U CN220584923 U CN 220584923U
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- 238000010521 absorption reaction Methods 0.000 claims abstract description 15
- 229920000742 Cotton Polymers 0.000 claims abstract description 11
- 230000030279 gene silencing Effects 0.000 claims abstract description 6
- 230000007306 turnover Effects 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 210000001624 hip Anatomy 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 7
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 239000006096 absorbing agent Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Building Environments (AREA)
Abstract
The utility model relates to a sound absorbing device for processing low-frequency standing waves, which can be installed at the corners of indoor walls and comprises: the shell and the sound-absorbing, silencing and noise-reducing structure are positioned in the shell; the shell is provided with a first panel facing the indoor space, a plurality of first sound absorption holes communicated with the interior of the shell are arranged on the first panel, a sound absorption film is stuck to the inner side surface of the shell, and a plurality of positioning blocks are fixed on the outer side of the shell; the sound-absorbing, silencing and noise-reducing structure comprises a low-frequency resonance device and two inner plates, wherein the two inner plates are respectively arranged on one side, facing the first panel, of the low-frequency resonance device and one side, facing away from the first panel, of the low-frequency resonance device, a plurality of second sound-absorbing holes are formed in the inner plates, sound-absorbing cotton is arranged in a gap between the inner plates and the low-frequency resonance device, and an air cavity is formed between the inner plates and the outer shell. The sound absorbing device of this application embodiment can carry out sliding fit with the location structure of outside through set up the locating piece in the outside of shell to make things convenient for sound absorbing device's installation, be favorable to reducing installer's physical demands, raise the efficiency.
Description
Technical Field
The utility model relates to the technical field of low-frequency sound absorbing devices, in particular to a sound absorbing device for treating low-frequency standing waves.
Background
The low frequency sound absorbing devices (low frequency traps) that are currently common in the market generally use the following methods: helmholtz resonators, resonant low frequency, fiberglass broadband absorption, and small variations of the above. The Helmholtz resonator and resonant low frequency require the case to be rigid and heavy, and are usually too large to construct, thus resulting in excessive cost; however, the glass fiber broadband absorption type low-frequency trap is difficult to generate sufficient and effective absorption for the frequency below 80HZ, and is difficult to meet the requirements of laboratories with higher acoustic index requirements. The prior low-frequency sound absorbing device has unreasonable internal structural design, the sound absorbing effect cannot be optimized, and in addition, the low-frequency sound absorbing device is generally installed on a wall or a corner only through fasteners such as screws, and is inconvenient to lift up the locking screws during installation.
Disclosure of Invention
Based on this, the object of the present utility model is to overcome the disadvantages of the prior art and to provide a sound absorbing device that handles standing waves at low frequencies.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a sound absorbing device for treating low frequency standing waves, mountable in a corner of an indoor wall, comprising:
the hollow shell with a trapezoid cross section shape and the sound-absorbing, silencing and noise-reducing structure positioned in the shell;
the shell is provided with a first panel facing the indoor, a plurality of first sound absorption holes communicated with the interior of the shell are arranged on the first panel, a sound absorption film is stuck on the inner side surface of the shell, a plurality of positioning blocks are fixed on the outer side of the shell and are used for being in sliding fit with an external positioning structure so as to preliminarily position the sound absorption device;
the sound-absorbing, silencing and noise-reducing structure comprises a low-frequency resonance device and two inner plates, wherein the two inner plates are respectively arranged on one side, facing the first panel, of the low-frequency resonance device and one side, facing away from the first panel, of the low-frequency resonance device, a plurality of second sound-absorbing holes are formed in the inner plates, sound-absorbing cotton is arranged in a gap between the inner plates and the low-frequency resonance device, and an air cavity is formed between the inner plates and the outer shell.
The sound absorbing device of this application embodiment can effectively convert sound wave mechanical energy into the internal energy consumption through resonance, does not sound production when converting, and this structure can effectively absorb the low frequency, and it is wider to absorb the low frequency band, and the coverage is wide, and whole volume and weight are less, and is light, but reduce cost, and the outward appearance is pleasing to the eye easy clean reason, through set up the locating piece in the outside of shell, can carry out sliding fit with outside location structure to make things convenient for sound absorbing device's installation, be favorable to reducing installer's physical demands, raise the efficiency.
In one embodiment, the first panel has a plate-like structure constituting a bottom side of the trapezoid, the housing further has two side plates constituting two waists of the trapezoid, and the positioning blocks are disposed outside the two side plates.
As one implementation mode, the periphery edge of the inner plate is provided with a turnover edge, and the turnover edge is connected with the shell through a fastener.
As one implementation mode, the shell is provided with a plurality of installation parts which are matched with the positioning blocks, and the positioning blocks are fixedly installed on the installation parts.
As one embodiment, the positioning block is connected to the mounting portion by a screw.
As an implementation mode, the outside of the positioning block is wrapped with a silica gel layer.
As one embodiment, the low-frequency resonance device is a basin-shaped structure with an opening facing the first panel, and a plurality of quadrangular grid holes are formed in the basin-shaped structure by separating plates.
As one embodiment, the thickness of the sound absorbing cotton is 20mm to 40mm.
As one embodiment, the first sound-absorbing hole is a bar-shaped hole.
As an embodiment, a shielding net is further disposed on the outer side of the first panel.
For a better understanding and implementation, the present utility model is described in detail below with reference to the drawings.
Drawings
Fig. 1 is a schematic structural view of a sound absorbing device according to an embodiment of the present disclosure when the sound absorbing device is mounted on a wall;
fig. 2 is an exploded view of a sound absorber and a wall according to an embodiment of the present disclosure;
FIG. 3 is a schematic cross-sectional view of a sound absorber according to an embodiment of the present disclosure when installed on a wall;
fig. 4 is a schematic structural view of another view of the sound absorbing device according to the embodiment of the present application;
FIG. 5 is a schematic view of a portion of a sound absorber according to an embodiment of the present disclosure;
FIG. 6 is a schematic view of a bass resonance device facing an opening direction in an embodiment of the present application;
FIG. 7 is an enlarged partial schematic view of the connection between the inner plate and the outer shell in the embodiment of the present application;
reference numerals illustrate:
1. a housing; 11. a first panel; 12. a first sound-absorbing hole; 13. a side plate; 14. a mounting part; 21. a low frequency resonance device; 211. a partition plate; 22. an inner plate; 221. turning over the edge; 222. a fastener; 23. sound absorbing cotton; 24. an air chamber; 3. a positioning block; 4. a shielding net; 5. a wall body; 51. and a positioning structure.
Detailed Description
For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible implementations and advantages of the present utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present utility model.
Referring to fig. 1 to 4, the present embodiment provides a sound absorbing device for processing low-frequency standing waves, which can be installed at corners of indoor walls 5, and includes: the hollow shell 1 with a trapezoid cross section shape and the sound-absorbing, noise-eliminating and noise-reducing structure positioned inside the shell 1.
The shell 1 is formed by splicing metal plates, the shell 1 is provided with a first panel 11 facing the room, a plurality of first sound absorption holes 12 which are communicated with the inside of the shell 1 are arranged on the first panel 11, the shell 1 spliced by the metal plates can ensure that the sound absorption device has good sound transmission effect, widens the absorption low-frequency band and simultaneously has plastic deformation resistance of the shell 1, a hard and difficultly deformed external structure is provided, and the overall weight is reduced, and meanwhile, the cleaning and the later maintenance are convenient. The sound-absorbing film is adhered to the inner side surface of the shell 1, and can be used as a leakage-proof layer with strong adsorption force while providing a certain sound-absorbing function, so that a relatively airtight and airtight environment is provided for the shell 1. A plurality of positioning blocks 3 are fixed on the outer side of the shell 1, and the positioning blocks 3 are used for being in sliding fit with an external positioning structure 51 so as to preliminarily position the sound absorbing device. During installation, the positioning structure 51 can be installed on the wall 5, then the sound absorbing device is slidably matched with the positioning structure 51 through the positioning block 3, so that the sound absorbing device is initially positioned, and then the sound absorbing device is locked on the wall 5 through the fasteners 222 such as screws, so that the sound absorbing device is completely fixed. Through set up locating piece 3 in the outside of shell 1, can carry out sliding fit with outside location structure 51 to make things convenient for sound absorbing device's installation, be favorable to reducing installer's physical demands, raise the efficiency. The positioning structure 51 may be shaped to fit the positioning block 3, for example, also in a block shape.
The sound-absorbing, noise-reducing and noise-reducing structure comprises a low-frequency resonance device 21 and two inner plates 22, the two inner plates 22 are respectively arranged on one side of the low-frequency resonance device 21 facing the first panel 11 and one side of the low-frequency resonance device facing away from the first panel 11, a plurality of second sound-absorbing holes (not shown in the figure) are formed in the inner plates 22, sound-absorbing cotton 23 is arranged in a gap between the inner plates 22 and the low-frequency resonance device 21, an air cavity 24 is formed between the inner plates 22 and the shell 1, and the sound-absorbing cotton 23 is fixed by the two inner plates 22 and the low-frequency resonance device 21 in an extrusion mode, is tightly combined and is not easy to loose and fall off, so that the inside is not required to be fixed by adopting an additional structure.
The sound absorbing device of this application embodiment can be through resonance effective conversion to the internal energy consumption, and the sound production is not in the same time converted, and this structure can effectively absorb the low frequency, and it is wider to absorb low frequency band, and the coverage is wide, and whole volume and weight are less, and is light, but reduce cost, and the outward appearance is pleasing to the eye easy clean reason.
In this embodiment, the first panel 11 has a plate-like structure constituting the bottom side of the trapezoid, the housing 1 further has two side plates 13 constituting two waists of the trapezoid, and the positioning blocks 3 are disposed outside the two side plates 13. After the sound absorbing device is installed, the two side plates 13 are opposite to the two intersected walls 5 respectively, and the positioning block 3 arranged in this way has a better positioning effect.
As shown in fig. 5, in some embodiments, the housing 1 is provided with a plurality of mounting portions 14 adapted to the positioning block 3, and the positioning block 3 is mounted and fixed on the mounting portions 14, so that the positioning block 3 can be conveniently mounted, and the positioning block 3 can be mounted by selecting the mounting portions 14 with different positions, so as to adjust the specific position of the positioning block 3, and the use is convenient. The mounting portion 14 may be two limiting ribs, and the two limiting ribs form a clamping groove for fixing the positioning block 3, preferably, the positioning block 3 is connected with the mounting portion 14 through a screw, so as to improve connection firmness.
In order to prevent collision noise generated between the positioning block 3 and the positioning structure 51 due to vibration of the sound absorbing device, preferably, a silica gel layer (not shown) is wrapped on the outer side of the positioning block 3 in this embodiment, and the silica gel layer can play a certain role in buffering to avoid noise.
As shown in fig. 6, in the present embodiment, the low-frequency resonance device 21 is a basin-shaped structure with an opening facing the first panel 11, and a plurality of quadrangular grid holes are formed in the basin-shaped structure by separating the inside of the basin-shaped structure with a separator 211, so that the low-frequency resonance device 21 can increase the reflection area, enhance the resonance effect, and enhance the low-frequency absorption effect.
Preferably, the thickness of the sound absorbing cotton 23 is 20mm to 40mm, and the sound absorbing cotton 23 may use highly compressed glass fiber sound absorbing cotton 23, which may be made light and soft by adding additives such as a softening aid.
Specifically, the first sound-absorbing holes 12 in this embodiment are bar-shaped holes, so that the sound transmission effect is good. The second sound absorbing hole is a round hole.
Preferably, a shielding net 4 is further arranged on the outer side of the first panel 11, and the shielding net 4 can prevent foreign garbage from entering the casing 1 through the first sound absorbing holes 12.
As shown in fig. 7, the peripheral edge of the inner plate 22 is provided with a turnover edge 221, and the turnover edge 221 is connected with the outer shell 1 through a fastener 222, so that the inner plate 22 is convenient to fix, and the fastener 222 is preferably a blind rivet, so that a tight and firm whole can be quickly formed.
The above examples merely represent a few embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the inventive manual self-centering vise. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.
Claims (10)
1. A sound absorbing device for treating low frequency standing waves, mountable in a corner of an indoor wall, comprising:
the hollow shell with a trapezoid cross section shape and the sound-absorbing, silencing and noise-reducing structure positioned in the shell;
the shell is provided with a first panel facing the indoor, a plurality of first sound absorption holes communicated with the interior of the shell are arranged on the first panel, a sound absorption film is stuck on the inner side surface of the shell, a plurality of positioning blocks are fixed on the outer side of the shell and are used for being in sliding fit with an external positioning structure so as to preliminarily position the sound absorption device;
the sound-absorbing, silencing and noise-reducing structure comprises a low-frequency resonance device and two inner plates, wherein the two inner plates are respectively arranged on one side, facing the first panel, of the low-frequency resonance device and one side, facing away from the first panel, of the low-frequency resonance device, a plurality of second sound-absorbing holes are formed in the inner plates, sound-absorbing cotton is arranged in a gap between the inner plates and the low-frequency resonance device, and an air cavity is formed between the inner plates and the outer shell.
2. The sound absorbing device for handling low frequency standing waves of claim 1, wherein:
the first panel is of a plate-shaped structure forming the bottom edge of the trapezoid, the shell is further provided with two side plates forming two waists of the trapezoid, and the positioning blocks are arranged on the outer sides of the two side plates.
3. The sound absorbing device for handling low frequency standing waves of claim 1, wherein:
the edge around the inner panel is equipped with turns over the limit, turn over the limit and be connected with the shell through the fastener.
4. The sound absorbing device for handling low frequency standing waves of claim 1, wherein:
the shell is provided with a plurality of mounting parts which are matched with the positioning blocks, and the positioning blocks are fixedly arranged on the mounting parts.
5. The sound absorbing device for handling low frequency standing waves of claim 4, wherein:
the positioning block is connected with the mounting part through a screw.
6. The sound absorbing device for handling low frequency standing waves of claim 1, wherein:
and a silica gel layer is wrapped on the outer side of the positioning block.
7. The sound absorbing device for handling low frequency standing waves of claim 1, wherein:
the low-frequency resonance device is of a basin-shaped structure with an opening facing the first panel, and a plurality of quadrangular grid holes are formed in the basin-shaped structure by separating plates.
8. The sound absorbing device for handling low frequency standing waves of claim 1, wherein:
the thickness of the sound-absorbing cotton is 20 mm-40 mm.
9. The sound absorbing device for handling low frequency standing waves of claim 1, wherein:
the first sound absorbing holes are strip-shaped holes.
10. The sound absorbing device for treating a low-frequency standing wave according to any one of claims 1 to 9, wherein:
and a shielding net is further arranged on the outer side of the first panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322176203.3U CN220584923U (en) | 2023-08-11 | 2023-08-11 | Sound absorbing device for treating low-frequency standing waves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322176203.3U CN220584923U (en) | 2023-08-11 | 2023-08-11 | Sound absorbing device for treating low-frequency standing waves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220584923U true CN220584923U (en) | 2024-03-12 |
Family
ID=90119122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322176203.3U Active CN220584923U (en) | 2023-08-11 | 2023-08-11 | Sound absorbing device for treating low-frequency standing waves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220584923U (en) |
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2023
- 2023-08-11 CN CN202322176203.3U patent/CN220584923U/en active Active
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