CN203573642U - Sound absorption structure - Google Patents
Sound absorption structure Download PDFInfo
- Publication number
- CN203573642U CN203573642U CN201320705567.XU CN201320705567U CN203573642U CN 203573642 U CN203573642 U CN 203573642U CN 201320705567 U CN201320705567 U CN 201320705567U CN 203573642 U CN203573642 U CN 203573642U
- Authority
- CN
- China
- Prior art keywords
- sound absorption
- sounding board
- closed cavity
- absorption structure
- sound
- 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.)
- Expired - Lifetime
Links
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 99
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000000835 fiber Substances 0.000 claims description 10
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 229920002521 macromolecule Polymers 0.000 claims description 5
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000013016 damping Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 238000005452 bending Methods 0.000 abstract 1
- 230000009102 absorption Effects 0.000 description 69
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000011491 glass wool Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Landscapes
- Building Environments (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model discloses a sound absorption structure, which comprises a bottom plate, a perforation plate and a resonance plate. The perforation plate is fixed on the bottom plate to form a closed cavity body; the closed cavity body is internally provided with sound absorption material, and the sound absorption is fixed on the bottom plate; and the resonance plate is inserted in the sound absorption material. The resonance plate in the sound absorption structure has rich bending vibration normal frequency, when the sound absorption structure absorbs the sound and vibration is generated, the sound absorption material can serve as a damping layer of the resonance plate, the sound absorption material is elastic, the resonance plate and the sound absorption material make up a mass spring resonance structure, a wide low-frequency sound absorption frequency band is provided, the sound absorption coefficient particularly in the 50Hz to 400Hz frequency band is improved obviously, and the relationship between the low frequency sound absorption effect and the sound absorption structure size is balanced. Sound absorption advantages of the sound absorption material connected with the resonance plate in intermediate and high frequency can be made full use of, and the sound absorption structure then also has high-efficiency absorption performances in the intermediate and high frequency noise ranges. The sound absorption structure is simple in structure, convenient in installation and suitable for scaled production and application.
Description
Technical field
The utility model belongs to noise abatement technical field, particularly relates to a kind of sound absorption structure.
Background technology
In recent years, in order to meet the needs of urban distribution network development, some indoor substations are all near residential block or directly build residential block in, and transformer station's noise disturbs residents and also becomes the focus that various circles of society pay close attention to, so the noise of controlling transformer station becomes the problem that must consider.
The following three kinds of methods of the general utilization of noise control of indoor substation:
1) in transformer chamber, sound absorbing module is installed and is reduced reverberation noise;
2) hole is installed sound insulation door and window, reduces the intensity that noise is outwards propagated;
3) enter in air exhaust passage and fix a silencer, reduce the wind-power engineering measures such as sonic propagation of making an uproar.
Wherein, in transformer room, sound absorption structure being installed is most important and the most basic technical measures, can reduce indoor reverberation noise, OA overall noise level and reduce the intensity that noise is outwards propagated.
From transformer station's principles and structure, transformer station's noise is mainly produced by transformer, reactor, wave filter, blower fan cooling device.Its spectral characteristic main manifestations is that medium and low frequency is made an uproar, and has the characteristics such as propagation distance is far away, the rate of decay is slow, and wherein peak value generally appears in 20-500Hz frequency range, and sound pressure level has exceeded 70dB when maximum.And from the technical standpoint of noise control, the frequency of noise is lower, the noise abatement measure difficulty of taking is larger, and reason is that the wavelength of low-frequency noise is long, and range attenuation rate is low, is also difficult for being absorbed, isolates and eliminates.Therefore the sound absorption of low-frequency noise, sound insulation and noise countermeasure have certain singularity and technical difficulty.By sound absorption principle, divide, traditional sound absorption structure can be divided into porous sound absorption structure and the large class of resonance sound-absorbing structure two, in acoustics noise reduction engineering, especially in architectural acoustics or Environmental Noise, the noise ratio of absorption or middle and high frequency range more than reduction 500Hz is easier to, conventionally adopt porous sound absorption structure can reach good effect, and for the low frequency range noise below 300Hz, normally adopt resonance sound-absorbing structure it is absorbed or reduce, as perforation board resonance sound absorption structure, resonance sound-absorbing structure for sheet, micropunch resonance sound-absorbing structure etc.
But the resonance sound-absorbing structure adopting is at present administered low frequency range noise, the defect such as have that wide band sound absorption is comparatively narrow, frequency selectivity is too strong and sound absorption structure volume is large, is the research difficult problem in noise abatement.
Summary of the invention
Based on this, the utility model is to overcome that prior art wide band sound absorption is comparatively narrow, frequency selectivity is too strong and the large defect of sound absorption structure volume, and a kind of sound absorption structure is provided.
Its technical scheme is as follows:
A kind of sound absorption structure, comprises base plate, perforated plate and sounding board, and described perforated plate is fixed on described base plate and forms a closed cavity, and described perforated plate is provided with multiple the first sound absorption holes; Described closed cavity inside is provided with acoustic absorbant and facing material, and described facing material is arranged at described closed cavity inwall, and described facing material is coated described acoustic absorbant; Described sounding board is inserted between the acoustic absorbant of described closed cavity inside.
Below further technical scheme is described:
Described sounding board is arranged at described closed cavity middle part, and the size of described sounding board is 40%～80% of described closed cavity end face size, and described sounding board border freely.
Described base plate is silk screen, riglet or monoblock flat board.
The thickness of described perforated plate is 0.5～3mm, and percentage of perforation is 20%～50%, and the diameter in described the first sound absorption hole is 1mm～10mm.
Described sounding board is provided with multiple the second sound absorption holes.
The thickness of described sounding board is 0.5mm～20mm, and percentage of perforation is 5%～10%, and the diameter in described the second sound absorption hole is 0.2mm～10mm.
Described acoustic absorbant is inorganic fibre acoustic absorbant, macromolecule open-cell foamed plastics or organic fiber acoustic absorbant.
Principle to aforementioned techniques scheme, effect etc. describe below:
1. the sounding board in sound absorption structure has abundant flexural vibrations normal frequency, when sound absorption structure sound absorption produces vibration, acoustic absorbant can be used as the damping layer of sounding board, and acoustic absorbant has elasticity, sounding board and acoustic absorbant have formed quality spring resonance structure, there is wider low frequency absorption frequency band, at 50Hz～400Hz frequency range acoustical absorption coefficient, be significantly improved especially, balance the relation between effect of low-frequency sound absorption and sound absorption structure volume; Meanwhile, take full advantage of the acoustic absorbant that is connected with the sounding board sound absorption advantage at medium, high frequency, make sound absorption structure also there are efficient absorptive character within the scope of middle and high frequency range noise; Simple in structure, easy for installation, be convenient to large-scale production and application.
2. the size of sounding board is that 40%～80% of closed cavity end face size is conducive to the acoustically effective that keeps good; And sounding board border is freely the wall that sounding board is not fixed on closed cavity, sound absorption structure can change into the sound of absorption the vibration of sounding board with acoustic absorbant, is conducive to the acoustically effective that keeps good.
3. the diameter of the percentage of perforation of perforated plate 20%～50% and first sound absorption hole 1mm～10mm, the diameter of the percentage of perforation of sounding board 5%～10% and second sound absorption hole 0.2mm～10mm, all the vibrations that are conducive to effectively sound be changed into sounding board, to keep good acoustically effective; And the thickness of the thickness of perforated plate 0.5～3mm, sounding board 0.5mm～20mm can obtain the quality that sound absorption structure is different, according to the relation of quality spring resonance architecture quality and vibration, determine that suitable quality is to reach optimum acoustically effective.
4. inorganic fibre acoustic absorbant, macromolecule open-cell foamed plastics or organic fiber acoustic absorbant are all acoustic absorbants with holes, have good acoustically effective.
Accompanying drawing explanation
Fig. 1 is the utility model sound absorption structure one-piece construction schematic diagram.
Description of reference numerals:
100. sound absorption structures, 110. base plates, 120. perforated plates, 122. first sound absorption holes, 130. sounding boards, 132. second sound absorption holes, 140. closed cavities, 150. acoustic absorbants, 160. facing materials.
Embodiment
Below embodiment of the present utility model is elaborated:
As shown in Figure 1, a kind of sound absorption structure 100, comprises base plate 110, perforated plate 120 and sounding board 130, and perforated plate 120 is fixed on base plate 110 and forms a closed cavity 140, and perforated plate 120 is provided with multiple the first sound absorption holes 122; Closed cavity 140 inside are provided with acoustic absorbant 150 and facing material 160, and facing material 160 is arranged at closed cavity 140 inwalls, the coated acoustic absorbant 150 of facing material 160; Sounding board 130 is inserted between the acoustic absorbant 150 of closed cavity 140 inside.
As shown in Figure 1, in an embodiment, sounding board 130 is arranged at closed cavity 140 middle parts therein, and the size of sounding board 130 is 40%～80% of closed cavity 140 end face sizes, and sounding board 130 borders freely.The size of sounding board 130 is that 40%～80% of closed cavity 140 end face sizes are conducive to the acoustically effective that keeps good; And sounding board 130 borders are freely the wall that sounding board 130 is not fixed on closed cavity 140, sound absorption structure 100 can change into the sound of absorption the vibration of sounding board 130 with acoustic absorbant 150, is conducive to the acoustically effective that keeps good.
In an embodiment, base plate 110 is silk screen, riglet or monoblock flat board therein.
In an embodiment, the thickness of perforated plate 120 is 0.5～3mm therein, and percentage of perforation is that the diameter in the 20%～50%, first sound absorption hole 122 is 1mm～10mm.The percentage of perforation of perforated plate 120 be 20%～50% and the diameter in the first sound absorption hole 122 be 1mm～10mm, be conducive to effectively sound be changed into the vibration of sounding board 130, to keep good acoustically effective; And the thickness of perforated plate 120 is 0.5～3mm, can obtain the quality that sound absorption structure 100 is different, according to the relation of quality spring resonance architecture quality and vibration, determine that suitable quality is to reach optimum acoustically effective.
As shown in Figure 1, in an embodiment, sounding board 130 is provided with multiple the second sound absorption holes 132 therein.Sounding board 130 arranges the second sound absorption hole 132 and is conducive to sound absorption, is convenient to acoustic energy to become the vibration kinetic energy of sounding board 130, to reach good acoustically effective.
In an embodiment, the thickness of sounding board 130 is 0.5mm～20mm therein, and percentage of perforation is that the diameter in the 5%～10%, second sound absorption hole 132 is 0.2mm～10mm.The percentage of perforation of sounding board 130 be 5%～10% and the diameter in the second sound absorption hole 132 be the vibration that 0.2mm～10mm is conducive to effectively sound be changed into sounding board 130, to keep good acoustically effective; And the thickness of sounding board 130 is 0.5mm～20mm, can obtain the quality that sound absorption structure 100 is different, according to the relation of quality spring resonance architecture quality and vibration, determine that suitable quality is to reach optimum acoustically effective.
In an embodiment, sounding board 130 both sides panels adopt glue spraying to be adhered to acoustic absorbant 150 therein.By bonding to sounding board 130 both sides panels and acoustic absorbant 150, can fix the relative position of sounding board 130, sounding board 130 can only be fluctuateed up and down with sound, can be to two side shiftings, thereby can not contact the wall of closed cavity 140, be conducive to the acoustically effective that keeps good.
In an embodiment, acoustic absorbant 150 is inorganic fibre acoustic absorbant 150, macromolecule open-cell foamed plastics or organic fiber acoustic absorbant 150 therein.Inorganic fibre acoustic absorbant 150, macromolecule open-cell foamed plastics or organic fiber acoustic absorbant 150 are all acoustic absorbants 150 with holes, have good acoustically effective.
Embodiment 1: a kind of sound absorption structure 100, comprise base plate 110, perforated plate 120 and sounding board 130, base plate 110 and perforated plate 120 form a closed cavity 140; In this closed cavity 140, be filled with acoustic absorbant 150, be inserted with sounding board 130 in the middle of acoustic absorbant 150, sounding board 130 forms border quality spring resonance structure freely with acoustic absorbant 150.Base plate 110 is expanded sheet metal, sounding board 130 rubber and plastic boards.The thickness of sounding board 130 is 10mm, and the thickness of perforated plate 120 is 0.8mm, and the diameter in the first sound absorption hole 122 and the second sound absorption hole 132 is 3mm, and the percentage of perforation of sounding board 130 and perforated plate 120 is 40%; Acoustic absorbant 150 is the 32kg/m that two-layer 50mm is thick
3centrifugally glass-wool.
Embodiment 2: a kind of sound absorption structure 100, comprise base plate 110, perforated plate 120 and sounding board 130, base plate 110 and perforated plate 120 form a closed cavity 140; In this closed cavity 140, be filled with acoustic absorbant 150, be inserted with sounding board 130 in the middle of acoustic absorbant 150, sounding board 130 forms border quality spring resonance structure freely with acoustic absorbant 150.Base plate 110 is monoblock flat board, thickness 1mm; Sounding board 130 is sheet metal, and its thickness is 1mm; Perforated plate 120 is punched steel plate, and its thickness is 0.8mm; The diameter in the first sound absorption hole 122 and the second sound absorption hole 132 is 3mm, and the percentage of perforation of sounding board 130 and perforated plate 120 is 23%; Acoustic absorbant 150 is the 32kg/m that two-layer 50mm is thick
3centrifugally glass-wool.
The utility model is the in the situation that of embodiment 2, and the low frequency absorption performance below 400Hz significantly promotes, and 400Hz～1000Hz intermediate frequency sound absorbing capabilities declines to some extent, but acoustical absorption coefficient is all more than 0.7, still belongs to efficient sound absorption, has widened the width of sound sucting band.
The above embodiment has only expressed embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (7)
1. a sound absorption structure, is characterized in that, comprises base plate, perforated plate and sounding board, and described perforated plate is fixed on described base plate and forms a closed cavity, and described perforated plate is provided with multiple the first sound absorption holes; Described closed cavity inside is provided with acoustic absorbant and facing material, and described facing material is arranged at described closed cavity inwall, and described facing material is coated described acoustic absorbant; Described sounding board is inserted between the acoustic absorbant of described closed cavity inside.
2. sound absorption structure according to claim 1, is characterized in that, described sounding board is arranged at described closed cavity middle part, and the size of described sounding board is 40%～80% of described closed cavity end face size, and described sounding board border freely.
3. sound absorption structure according to claim 2, is characterized in that, described base plate is silk screen, riglet or monoblock flat board.
4. sound absorption structure according to claim 1, is characterized in that, the thickness of described perforated plate is 0.5～3mm, and percentage of perforation is 20%～50%, and the diameter in described the first sound absorption hole is 1mm～10mm.
5. sound absorption structure according to claim 2, is characterized in that, described sounding board is provided with multiple the second sound absorption holes.
6. sound absorption structure according to claim 5, is characterized in that, the thickness of described sounding board is 0.5mm～20mm, and percentage of perforation is 5%～10%, and the diameter in described the second sound absorption hole is 0.2mm～10mm.
7. sound absorption structure according to claim 1, is characterized in that, described acoustic absorbant is inorganic fibre acoustic absorbant, macromolecule open-cell foamed plastics or organic fiber acoustic absorbant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320705567.XU CN203573642U (en) | 2013-11-08 | 2013-11-08 | Sound absorption structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320705567.XU CN203573642U (en) | 2013-11-08 | 2013-11-08 | Sound absorption structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203573642U true CN203573642U (en) | 2014-04-30 |
Family
ID=50541363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320705567.XU Expired - Lifetime CN203573642U (en) | 2013-11-08 | 2013-11-08 | Sound absorption structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203573642U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104465049A (en) * | 2014-11-24 | 2015-03-25 | 江苏华鹏变压器有限公司 | Low-noise transformer |
| WO2017000454A1 (en) * | 2015-06-30 | 2017-01-05 | 南京常荣声学股份有限公司 | Sound absorption plate with unit structure |
| CN110783084A (en) * | 2019-11-04 | 2020-02-11 | 国网湖南省电力有限公司 | A broadband composite resonance sound absorption and isolation structure |
| CN111862922A (en) * | 2020-08-11 | 2020-10-30 | 山东洁静环保设备有限公司 | Low-frequency noise reduction and silencing sheet |
| CN112951192A (en) * | 2021-04-09 | 2021-06-11 | 正升环境科技股份有限公司 | Internal side type resonance structure and silencer composed of same |
| CN113160784A (en) * | 2021-04-09 | 2021-07-23 | 正升环境科技股份有限公司 | Resonance structure and silencer composed of same |
| CN115045407A (en) * | 2022-03-22 | 2022-09-13 | 广州市声美科技有限公司 | 100Hz hyperbolic waveform sound absorption diffuser |
-
2013
- 2013-11-08 CN CN201320705567.XU patent/CN203573642U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104465049A (en) * | 2014-11-24 | 2015-03-25 | 江苏华鹏变压器有限公司 | Low-noise transformer |
| WO2017000454A1 (en) * | 2015-06-30 | 2017-01-05 | 南京常荣声学股份有限公司 | Sound absorption plate with unit structure |
| US10026390B2 (en) * | 2015-06-30 | 2018-07-17 | Nanjing Changrong Acoustic Inc. | Sound absorption plate with unit structure |
| CN110783084A (en) * | 2019-11-04 | 2020-02-11 | 国网湖南省电力有限公司 | A broadband composite resonance sound absorption and isolation structure |
| CN111862922A (en) * | 2020-08-11 | 2020-10-30 | 山东洁静环保设备有限公司 | Low-frequency noise reduction and silencing sheet |
| CN112951192A (en) * | 2021-04-09 | 2021-06-11 | 正升环境科技股份有限公司 | Internal side type resonance structure and silencer composed of same |
| CN113160784A (en) * | 2021-04-09 | 2021-07-23 | 正升环境科技股份有限公司 | Resonance structure and silencer composed of same |
| CN115045407A (en) * | 2022-03-22 | 2022-09-13 | 广州市声美科技有限公司 | 100Hz hyperbolic waveform sound absorption diffuser |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203573642U (en) | Sound absorption structure | |
| CN105803965B (en) | A kind of broadband sound absorption cell board | |
| CN207260354U (en) | A kind of noise control damping Acoustic barrier plate | |
| CN202093817U (en) | Composite resonant sound absorption structure | |
| CN106558302B (en) | Noise reduction method for sound source equipment | |
| CN106782475B (en) | Composite resonance sound absorption structure | |
| CN205529956U (en) | Broadband sound absorption cell board | |
| CN204356925U (en) | A kind of indoor substation low frequency absorption denoising device | |
| CN201199437Y (en) | Sound isolation sound-absorbing baffle | |
| CN210639979U (en) | Inhale sound insulation composite member and transformer | |
| CN207314568U (en) | A kind of efficiently middle low frequency absorption mechanism of substation | |
| CN206448393U (en) | A kind of Wooden sound-absorbing plate | |
| CN113007070A (en) | Air inlet silencer for compressor set sound insulation cover | |
| CN203398525U (en) | Noise-reducing and sound-absorbing device for transformer substation | |
| CN106653286B (en) | A kind of American Unit Substation noise-reduction case | |
| CN206034673U (en) | Acoustic wall of making an uproar falls | |
| CN205823099U (en) | A kind of novel sound window | |
| CN210658083U (en) | Transparent ventilation noise eliminator | |
| CN206628269U (en) | A kind of square noise stops protector | |
| CN117947922A (en) | A class super-structure polyester sound absorption module for sound absorption and noise reduction in medium-low frequency environment | |
| CN207048098U (en) | A kind of sandwich sound-absorbing composite board | |
| CN110331925A (en) | Purify ventilated and soundproof window | |
| CN206289549U (en) | Outdoor composite sound absorbing module | |
| CN211446650U (en) | Transparent sound absorption cap for top of sound insulation barrier | |
| CN204608626U (en) | A kind of noise barrier structure being applicable to power plant cooling tower band ventilation electricity generate function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140430 |