CN207489464U - Alliteration impedance period micropunch ultrabroad band sound absorption structure - Google Patents
Alliteration impedance period micropunch ultrabroad band sound absorption structure Download PDFInfo
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- CN207489464U CN207489464U CN201721510870.9U CN201721510870U CN207489464U CN 207489464 U CN207489464 U CN 207489464U CN 201721510870 U CN201721510870 U CN 201721510870U CN 207489464 U CN207489464 U CN 207489464U
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Abstract
The utility model is related to alliteration impedance period micropunch ultrabroad band sound absorption structures.The closed cavity of periodic arrangement is connected to form by micropunch panel, cell separators, unit baseboard, left side, right side, front end face, rear end face, by two kinds of depth cavity mechanical periodicities, larger depth is 1.5 ~ 4.5 times of smaller depth.0.5%~4% micropore that occupied area is panel area is distributed on micropunch panel, micropore size is 0.3~1.2mm, and cell width is no more than 0.2m.As long as the utility model to be installed to the place handled that needs to absorb sound during use, it is fixed on wall surface.The utility model device is simple, simple processing, and thin type is light, sound absorbing performance is excellent, and sound sucting band width of the acoustic absorptivity in 2.5KHz more than 0.8 is up to 3 octaves, and peak value is close to 1.0, sound absorbing performance is flat, it is widely applicable, easy cleaning, high temperature resistant, and with superior weatherability, it can recycle completely, it is no any interior to fill out fibrous material, it is entirely avoided the problem of secondary pollution, there is superior environment-friendly function.
Description
Technical field
The utility model category technical field of acoustics, it is specially a kind of micro- for the alliteration impedance mechanical periodicity of Middle and low frequency noise
Perforation ultrabroad band sound absorption structure.
Background technology
Problem of noise pollution is with the development of urban economy and the growth getting worse of population, and noise pollution is to the shadow of people
It rings caused complaint and all kinds of environment are complained more than 50% is accounted in economically developed city.With the propulsion of Process of Urbanization Construction, no
Disconnected increased social activities and the living environment low frequency characteristic that equipment is used to cause people are apparent, this just often results in ambient noise
Sound pressure level when being also not up to standard limited value, subjective sensation is worried by people.Low-frequency noise can generate the thinking ability of people
It interferes significantly with, influences the auditory system, nervous system and cardiovascular system of people.Therefore low-frequency noise is ground in recent ten years
Study carefully and earn widespread respect, the research of low-frequency sound-absorbing structure is one of hot spot therein.
Sound absorption structure is one of important measures in noise control technique.Traditional sound absorption structure be mostly hole fibrous material such as
Mineral wool, rock wool etc., additional perforated face plate.Porous fibrous material has the advantages that sound absorbing performance is good, but there are weatherability it is poor,
Sound absorbing performance fails and is used for a long time fiber generation the problem of flying upward, causing secondary pollution after being moistened, and health is produced
Raw harm.Usual porous fibrous material needs to be replaced after a period of use, and can also be endangered in production, process fiber
Human body.Due to resonance sound-absorbing structure moisture resistant, hygiene, environmental-friendly etc. than conventional porous fibrous material have it is excellent
More property, has been more and more widely used, and has the trend of substitution traditional fibre material.The mechanism of novel resonance sound-absorbing structure,
Computation model and development and application also always constantly develop it is perfect.
With the enhancing and improvement of living standard of people's environmental consciousness, no fiber absorbing material is more and more weighed
Depending on the trend for gradually replacing traditional porous fibrous material is presented.What is developed at present mainly has micro- wear without fiber absorbing material
Hole sound absorber, aluminum fabric acoustic absorption material, foaming aluminum sound-absorbing material, foam glass, polyurethane sound absorption foam etc..Foam glass is deposited
Frangible the shortcomings that, for acoustic absorptivity 0.4~0.6, sound sucting band is relatively narrow.Polyurethane sound absorption foam, which exists, is unable to high temperature resistant, resistance to
The shortcomings of time property is poor.The processing of microperforated panel structure is simple, without interior filling chock material, enough acoustic resistances is generated by micropore, with cavity shape
Into resonance sound-absorbing structure.But it is limited by processing technology, the aperture of metal microperforated panel is usually in 0.5mm ~ 1mm, individual layer micropunch
The sound sucting band of harden structure is very narrow, is usually no more than 1 octave.The sound sucting band of multilayer microperfrated structure is expanded, but
Typically not greater than 2 octaves.
But for the normal resonant sound absorption structure of single cavity, there is good sound absorbing performance in low frequency, it is necessary to substantially
Degree increases cavity depth, and the scale of construction is often very big.In addition, the sound sucting band of the normal resonant sound absorption structure of single cavity is relatively narrow, it is right
The microperforated panel for being 1mm in aperture, half wide band sound absorption (acoustic absorptivity >=0.5) are typically less than 2 octaves.Absorb sound frequency requirement
It is lower, the thickness of sound absorption structure often require that it is bigger, under the occasion being generally restricted in space, normal resonant sound absorption structure without
Method meets the actual needs of noise abatement well.
For this purpose, the research and design of the good small size novel low-frequency resonance sound-absorbing structure of sound absorbing performance are always acoustics neck
The hot and difficult issue in domain.By the individual layer perforated microstructure of two kinds of acoustic impedances, the period is arranged side by side in one direction, and acoustic impedance variation causes
Scattering significantly affect the sound absorption characteristics of structure.It can cause that integrally-built sound sucting band is notable in the case of impedance matching
It widens, effective sound sucting band of more than 0.8 acoustic absorptivity is up to 3 octaves, and peak value is close to 1.0, and low frequency absorption performance is shown
It writes and improves.
Structure processing is simple, and simple installation, without any porous fibre sound-absorbing material, sound absorbing performance is superior.
Invention content
The purpose of this utility model is that propose pair that a kind of ultrabroad band, high acoustic absorption coefficient, device are simple, easy to clean
Acoustic impedance mechanical periodicity micropunch ultrabroad band sound absorption structure, suitable for each occasion for needing noise reduction, especially below 2.5KHz's
Noise.
The utility model proposes alliteration impedance mechanical periodicity micropunch ultrabroad band sound absorption structure, by unit A closing chambers
Body 10 and 11 alternate cycle of unit B closed cavity arrange to obtain, wherein：
Unit A closed cavities 10 are by unit A micropunch panel 1, front end face 3, rear end face 4, left side 5, cell separators
7th, the rectangular parallelepiped structure that unit A bottom plates 8 are connected to form, four sides of unit A micropunch panel 1 connect respectively 3 side of front end face, after
4 side of end face, 5 side of left side, 7 side of cell separators；8 four side of unit A bottom plates, 3 side of difference front end face, rear end face 4 one
Side, 5 side of left side, 7 side of cell separators；
Unit B closed cavity 11 is by unit B micropunch panel 2, front end face 3, rear end face 4, right side 6, cell separators 7
The rectangular parallelepiped structure being connected to form with unit B bottom plate 9；Four sides of unit B micropunch panel 2 connect respectively 3 side of front end face, after
4 side of end face, 6 side of right side, 7 side of cell separators；9 four side of unit B bottom plate, 3 side of difference front end face, rear end face 4 one
Side, 6 side of right side, 7 side of cell separators；
2 flush with outer surface of unit A micropunch panel 1 and unit B micropunch panel；
Unit A micropores 12 are distributed on unit A micropunch panel 1, the area shared by unit A micropores 12, which is that unit A is micro-, to be worn
The 0.5%~4% of 1 gross area of hole face plate, is distributed with unit B micropore 13 on unit B micropunch panel 2, shared by unit B micropore 13
Area be 2 gross area of unit B micropunch panel 0.5%~4%；Unit A closed cavities 10 and unit B closed cavity 11
Cavity depth changes in binary cycle.
In the utility model, the aperture of unit A micropores 12 and unit B micropore 13 is 0.3 ~ 1.2mm.
In the utility model, the distance of unit A micropunch panel 1 to unit A bottom plates 8 is unit B micropunch panel 2 and list
1.5-4.5 times of the distance of first B bottom plates 9, the i.e. depth of unit A closed cavities 10 and unit B closed cavity 11 ratio for 1.5 ~
4.5。
In the utility model, unit A micropunch panel 1 arrives the distance of unit A bottom plates 8, no more than 350mm.
In the utility model, area shared by unit A micropores 12 for 1 gross area of unit A micropunch panel 0.3%~
4%, the area shared by unit B micropore 13 is the 0.3%~4% of 2 gross area of unit B micropunch panel.
In the utility model, the width of unit A closed cavities 10 and unit B closed cavity 11 is no more than 20cm.
The utility model has the advantages that acoustic absorptivity height, acoustic frequency bandwidth.Frequency model within 150Hz~2.5KHz
Preferable sound absorbing performance is respectively provided in enclosing, most of noise sources can be suitable for, the especially middle stronger noise source of low-frequency component is made an uproar
Sound reducing effect is notable.
Since the sound absorber of the utility model is formed using metal material or nonmetallic materials thin plate punching processing,
With easy processing, easy cleaning, high temperature resistant, and with superior weatherability, can recycle completely, it is entirely avoided traditional fibre
The problem of weatherability existing for material and secondary pollution, has superior environment-friendly function.
Using the utility model simple installation, as long as attaching it to needs the place handled that absorbs sound.
The beneficial effects of the utility model are：The utility model significantly widens middle low frequency absorption frequency band, low frequency in raising
Acoustic absorptivity.The utility model device is simple, and thin type is light, and sound absorbing performance is good, and simple processing is of low cost, acoustic absorptivity
Sound sucting band width more than 0.8 has superior weatherability up to 2 ~ 3 octaves, widely applicable, easy cleaning, high temperature resistant,
It can recycle completely, it is entirely avoided the problem of secondary pollution, there is superior environment-friendly function.
Description of the drawings
Fig. 1 is the utility model front view.
Fig. 2 is the utility model section figure.
Fig. 3 is 1 sound absorbing performance of embodiment.
Figure label：1 is unit A micropunch panels, and 2 be unit B micropunch panel, and 3 be front end face, and 4 be rear end face, 5
For left side, 6 be right side, and 7 be cell separators, and 8 be unit A bottom plates, and 9 be unit B bottom plate, and 10 be unit A closed cavities, 11
It is unit A micropores for unit B closed cavity, 12,13 be unit B micropore.
Specific embodiment
The embodiment of the utility model is further described below by embodiment.
Embodiment 1：Following each component mode as shown in Fig. 1 ~ Fig. 2 is connected, field technology personnel can smoothly implement.
Unit A micropunch panel 1, unit B micropunch panel 2, front end face 3, rear end face 4, left side 5, right side 6, cell separators 7,
Unit A bottom plates 8, unit B bottom plate 9 are connected, component units A closed cavities 10 and unit B closed cavity 11.Unit A micropunch faces
For plate 1 using the alumina plate of 0.6mm thickness, size is long 0.4m, wide 0.1m, it is distributed with 2000 on unit A micropunch panel 1 ~
The unit A micropores 12 that 3000 apertures are 0.6mm.For unit B micropunch panel 2 using the alumina plate of 0.5mm thickness, size is length
The unit B micropore 13 that 2000 ~ 3000 apertures of unit B are 0.5mm is distributed on unit B micropunch panel 2 by 0.4m, wide 0.1m.
The distance of unit A micropores panel 1 and unit A bottom plates 8 is 15cm, and the distance of unit B micropore panel 2 and unit B bottom plate 9 is 5cm.
Front end face 3, rear end face 4, left side 5, right side 6, cell separators 7, unit A bottom plates 8, unit B bottom plate 9 use
1.2mm steel plate.Front end face 3 is parallel with rear end face 4, and left side 5 is parallel with right side 6, left side 5 and front end face 3, unit A
Micropunch panel 1, unit A bottom plates 8 are vertical.Right side 6 is vertical with front end face 3, unit B micropunch panel 2, unit B bottom plate 9.
The sound absorbing performance of embodiment 1 is as shown in figure 3,500Hz ~ 2500Hz acoustic absorptivities are more than 0.8,400Hz ~ 2800Hz suctions
Sonic system number is more than 0.6.
Claims (5)
1. alliteration impedance period micropunch ultrabroad band sound absorption structure, it is characterised in that by unit A closed cavities (10) and unit B
Closed cavity (11) alternate cycle arranges to obtain, wherein：
Unit A closed cavities (10) are by unit A micropunch panel (1), front end face (3), rear end face (4), left side (5), list
The rectangular parallelepiped structure that first partition board (7), unit A bottom plates (8) are connected to form, before four sides of unit A micropunch panel (1) connect respectively
End face (3) side, rear end face (4) side, left side (5) side and cell separators (7) side；Distinguish on (8) four side of unit A bottom plates
Connect front end face (3) side, rear end face (4) side, left side (5) side and cell separators (7) side；
Unit B closed cavity (11) is by unit B micropunch panel (2), front end face (3), rear end face (4), right side (6), list
The rectangular parallelepiped structure that first partition board (7) and unit B bottom plate (9) are connected to form；Four sides of unit B micropunch panel (2) connect respectively
Front end face (3) side, rear end face (4) side, right side (6) side and cell separators (7) side；(9) four side of unit B bottom plate point
It Lian Jie not front end face (3) side, rear end face (4) side, right side (6) side and cell separators (7) side；
Unit A micropunch panel (1) and unit B micropunch panel (2) flush with outer surface；
Unit A micropores (12) are distributed on unit A micropunch panel (1), the area shared by unit A micropores (12) is micro- for unit A
Unit B micropore (13) is distributed on unit B micropunch panel (2) in the 0.5%~4% of perforated panel (1) gross area, and unit B is micro-
Area shared by hole (13) is the 0.5%~4% of unit B micropunch panel (2) gross area；Unit A closed cavities (10) and list
The cavity depth of first B closed cavities (11) changes in binary cycle.
2. alliteration impedance period micropunch ultrabroad band sound absorption structure according to claim 1, it is characterised in that unit A is micro-
Hole (12) and the aperture of unit B micropore (13) are 0.3 ~ 1.2mm.
3. alliteration impedance period micropunch ultrabroad band sound absorption structure according to claim 1, it is characterised in that unit A is micro-
The distance of perforated panel (1) to unit A bottom plates (8) is unit B micropunch panel (2) and the 1.5- of the distance of unit B bottom plate (9)
4.5 times, i.e. the depth ratio of unit A closed cavities (10) and unit B closed cavity (11) is 1.5 ~ 4.5.
4. alliteration impedance period micropunch ultrabroad band sound absorption structure according to claim 1, it is characterised in that unit A is micro-
Perforated panel (1) to unit A bottom plates (8) distance, no more than 350mm.
5. alliteration impedance period micropunch ultrabroad band sound absorption structure according to claim 1, it is characterised in that unit A is sealed
The width of closed chamber body (10) and unit B closed cavity (11) is no more than 20cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721510870.9U CN207489464U (en) | 2017-11-14 | 2017-11-14 | Alliteration impedance period micropunch ultrabroad band sound absorption structure |
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|---|---|---|---|
| CN201721510870.9U CN207489464U (en) | 2017-11-14 | 2017-11-14 | Alliteration impedance period micropunch ultrabroad band sound absorption structure |
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| CN207489464U true CN207489464U (en) | 2018-06-12 |
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| CN201721510870.9U Expired - Fee Related CN207489464U (en) | 2017-11-14 | 2017-11-14 | Alliteration impedance period micropunch ultrabroad band sound absorption structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108305608A (en) * | 2017-11-14 | 2018-07-20 | 同济大学 | Alliteration impedance period micropunch ultrabroad band sound absorption structure |
-
2017
- 2017-11-14 CN CN201721510870.9U patent/CN207489464U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108305608A (en) * | 2017-11-14 | 2018-07-20 | 同济大学 | Alliteration impedance period micropunch ultrabroad band sound absorption structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180612 Termination date: 20201114 |
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| CF01 | Termination of patent right due to non-payment of annual fee |