CN207552954U - Surface configuration and acoustic impedance binary cycle mutation micropunch ultrabroad band sound absorption structure - Google Patents
Surface configuration and acoustic impedance binary cycle mutation micropunch ultrabroad band sound absorption structure Download PDFInfo
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- CN207552954U CN207552954U CN201721509497.5U CN201721509497U CN207552954U CN 207552954 U CN207552954 U CN 207552954U CN 201721509497 U CN201721509497 U CN 201721509497U CN 207552954 U CN207552954 U CN 207552954U
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Abstract
The utility model is related to a kind of surface configuration and acoustic impedance binary cycle mutation 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 ~ 3.5 times of smaller depth.0.3%~3.5% micropore that occupied area is panel area is distributed on micropunch panel, micropore size is 0.2~1.2mm, 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, thin type is light, and sound absorbing performance is excellent, sound sucting band width of the acoustic absorptivity in 2.5KHz more than 0.8 is up to 3 octaves, for peak value close to 1.0, sound absorbing performance is flat, widely applicable, easy cleaning, high temperature resistant, and with superior weatherability, it can recycle completely, there is superior environment-friendly function.
Description
Technical field
The utility model category technical field of acoustics, specially a kind of surface configuration and acoustic impedance for Middle and low frequency noise are double
Period discontinuity micropunch 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 novel low-frequency sound absorption 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 non-concordant individual layer perforated microstructure in the surface of two kinds of acoustic impedances, the period is arranged side by side in one direction, sound
Scattering caused by impedance and surface configuration variation significantly affects the sound absorption characteristics of structure.It can cause in the case of impedance matching
Integrally-built sound sucting band is significantly widened, and effective sound sucting band of more than 0.8 acoustic absorptivity is up to 2 ~ 3 octaves, sound absorption
The sound sucting band of more than 0.6 coefficient is 0.9 ~ 1.0 up to 3 ~ 4 octave bands, peak value, and sound absorbing performance is flat, and middle low frequency absorption
It can significantly improve.
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 a kind of ultrabroad band, high acoustic absorption coefficient, the table that device is simple, easy to clean
Face configuration and acoustic impedance binary cycle mutation micropunch ultrabroad band sound absorption structure, suitable for each occasion for needing noise reduction, especially
The noise of below 2.5KHz.
The utility model proposes surface configuration and acoustic impedance binary cycle mutation micropunch ultrabroad band sound absorption structure, by list
First A closed cavities 12 and 13 alternating cyclical of unit B closed cavity arrange to obtain, wherein：
Unit A closed cavities 12 are by micropunch panel 1, unit A front end faces 3, unit A rear end faces 4, left side 7, unit
The rectangular parallelepiped structure that partition board 9 and unit A bottom plates 10 are connected to form, before the four sides difference connection unit A of unit A micropunch panel 1
End face 3,4 side of unit A rear end faces, 7 side of left side, 9 side of cell separators；10 4 side of unit A bottom plates difference connection unit A
3 side of front end face, 4 side of unit A rear end faces, 7 side of left side, 9 side of cell separators, unit A micropunch panel 1 and unit
A bottom plates 10 are parallel；
Unit B closed cavity 13 is by unit B micropunch panel 2, unit B front end face 5, unit B rear end face 6, right side
8th, the rectangular parallelepiped structure that cell separators 9 and unit B bottom plate 11 are connected to form；Four sides of unit B micropunch panel 2 connect list respectively
First 5 side of B front end faces, 6 side of unit B rear end face, 8 side of right side, 9 side of cell separators；Distinguish on 11 4 side of unit B bottom plate
5 side of connection unit B front end faces, 6 side of unit B rear end face, 8 side of right side, 9 side of cell separators；Unit B micropunch face
Plate 2 is parallel with unit B bottom plate 11；
Unit A micropunch panel 1 and 2 apparent height of unit B micropunch panel are non-concordant, unit A bottom plates 10 and unit B bottom
11 height of plate is concordant；
Unit A micropores 14 are distributed on unit A micropunch panel 1, the area shared by unit A micropores 14, which is that unit A is micro-, to be worn
Unit B micropore 15,15 institute of unit B micropore is distributed on unit B micropunch panel 2 in the 0.3%~3.5% of 1 gross area of hole face plate
The area accounted for is the 0.3%~3.5% of 2 gross area of unit B micropunch panel；Unit A closed cavities 12 and unit B closed cavity
13 cavity depth changes in binary cycle.
In the utility model, the aperture of unit A micropores 14 and unit B micropore 15 is 0.2 ~ 1.2mm.
In the utility model, the depth ratio of unit A closed cavities 12 and unit B closed cavity 13 is 1.5 ~ 3.5, i.e. unit
The distance of A micropunch panel 1 to unit A bottom plates 10 is unit B micropunch panel 2 and the 1.5-3.5 of the distance of unit B bottom plate 11
Times.
In the utility model, unit A micropunch panel 1 arrives the distance of unit A bottom plates 10, no more than 350mm.
In the utility model, the width of unit A closed cavities 12 and unit B closed cavity 13 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
Up to 2 ~ 3 octaves, the frequency bandwidth of 0.6 acoustic absorptivity is applicable in sound sucting band width more than 0.8 up to 3 ~ 4 octaves
It is wide, easy cleaning, high temperature resistant, and with superior weatherability, can recycle completely, it is entirely avoided secondary pollution is asked
Topic has 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 unit A front end faces, and 4 be unit
A rear end faces, 5 be unit B front end face, and 6 be unit B rear end face, and 7 be left side, and 8 be right side, and 9 be cell separators, and 10 be single
First A bottom plates, 11 be unit B bottom plate, and 12 be unit A closed cavities, and 13 be unit B closed cavity, and 14 be unit A panel micropores,
15 be unit B panel 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 be smoothly easy
Implement on ground.Unit A micropunch panel 1, unit B micropunch panel 2, unit A front end faces 3, unit A rear end faces 4, unit B front end
Face 5, unit B rear end face 6, left side 7, right side 8, cell separators 9, unit A bottom plates 10, unit B bottom plate 11 are connected, and composition is single
First A closed cavities 12 and unit B closed cavity 13.For unit A micropunch panel 1 using the steel plate of 0.3 ~ 0.5mm thickness, size is length
The unit A micropores 14 that 2000 ~ 3500 apertures are 0.3 ~ 0.5mm are distributed on unit A micropunch panel 1 by 0.5m, wide 0.08m.
Unit B micropunch panel 2 is using the steel plate of 0.3 ~ 0.5mm thickness, and size is long 0.5m, wide 0.08m, on unit B micropunch panel 2
The unit B micropore 15 that 2000 ~ 3500 apertures are 0.3 ~ 0.5mm is distributed with.Unit A micropores panel 1 and unit A bottom plates 10 away from
From for 8 ~ 10cm, the distance of unit B micropore panel 2 and unit B bottom plate 11 is 3 ~ 7cm.
Unit A front end faces 3, unit A rear end faces 4, unit B front end face 5, unit B rear end face 6, left side 7, right side 8,
Cell separators 9, unit A bottom plates 10, unit B bottom plate 11 use 1mm steel plates.Unit A front end faces 3 and unit A rear end faces 4 are flat
Row, unit B front end face 5 is parallel with unit B rear end face 6, and left side 7 is parallel with right side 8, left side 7 and unit A front end faces 3,
Unit A rear end faces 4, unit A micropunch panel 1, unit A bottom plates 10 are vertical.Right side 8 and unit B front end face 5, unit B rear end
Face 6, unit B micropunch panel 2, unit B bottom plate 11 are vertical.
As shown in figure 3, the sound absorbing performance of embodiment 1 is 0.8 in 500Hz ~ 2100Hz, and it is 0.6 in 400Hz ~ 2400Hz, peak
Value is more than 0.9.
Claims (5)
1. surface configuration and acoustic impedance binary cycle mutation micropunch ultrabroad band sound absorption structure, it is characterised in that closed by unit A
Cavity (12) and unit B closed cavity (13) alternating cyclical arrange to obtain, wherein：
Unit A closed cavities (12) are by unit A micropunch panel (1), unit A front end faces (3), unit A rear end faces (4), a left side
The rectangular parallelepiped structure that end face (7), cell separators (9) and unit A bottom plates (10) are connected to form, the four of unit A micropunch panel (1)
Side difference connection unit A front end faces (3), unit A rear end faces (4) side, left side (7) side, cell separators (9) side；It is single
First (10) four side of A bottom plates difference connection unit A front end faces (3) side, unit A rear end faces (4) side, left side (7) side, list
First partition board (9) side, unit A micropunch panel (1) are parallel with unit A bottom plates (10)；
Unit B closed cavity (13) is by unit B micropunch panel (2), unit B front end face (5), unit B rear end face (6), the right side
The rectangular parallelepiped structure that end face (8), cell separators (9) and unit B bottom plate (11) are connected to form；The four of unit B micropunch panel (2)
Side difference connection unit B front end faces (5) side, unit B rear end face (6) side, right side (8) side, cell separators (9) one
Side；(11) four side of unit B bottom plate difference connection unit B front end faces (5) side, unit B rear end face (6) side, right side (8) one
Side, cell separators (9) side；Unit B micropunch panel (2) is parallel with unit B bottom plate (11)；
Unit A micropunch panel (1) and unit B micropunch panel (2) apparent height are non-concordant, unit A bottom plates (10) and unit B
Bottom plate (11) height is concordant；
Unit A micropores (14) are distributed on unit A micropunch panel (1), the area shared by unit A micropores (14) is micro- for unit A
Unit B micropore (15), unit B is distributed on unit B micropunch panel (2) in the 0.3%~3.5% of perforated panel (1) gross area
Area shared by micropore (15) is the 0.3%~3.5% of unit B micropunch panel (2) gross area；Unit A closed cavities (12)
Change with the cavity depth of unit B closed cavity (13) in binary cycle.
2. surface configuration according to claim 1 and acoustic impedance binary cycle mutation micropunch ultrabroad band sound absorption structure,
The depth ratio for being characterized in that unit A closed cavities (12) and unit B closed cavity (13) is 1.5 ~ 3.5, i.e. unit A micropunch
The distance of panel (1) to unit A bottom plates (10) is unit B micropunch panel (2) and the 1.5- of the distance of unit B bottom plate (11)
3.5 again.
3. surface configuration according to claim 1 and acoustic impedance binary cycle mutation micropunch ultrabroad band sound absorption structure,
The aperture for being characterized in that unit A micropores (14) and unit B micropore (15) is 0.2-1.2mm.
4. surface configuration according to claim 1 and acoustic impedance binary cycle mutation micropunch ultrabroad band sound absorption structure,
It is characterized in that the width of unit A closed cavities (12) and unit B closed cavity (13) is no more than 20cm.
5. surface configuration according to claim 1 and acoustic impedance binary cycle mutation micropunch ultrabroad band sound absorption structure,
Unit A micropunch panel (1) is characterized in that the distance of unit A bottom plates (10), no more than 350mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721509497.5U CN207552954U (en) | 2017-11-14 | 2017-11-14 | Surface configuration and acoustic impedance binary cycle mutation micropunch ultrabroad band sound absorption structure |
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| CN201721509497.5U CN207552954U (en) | 2017-11-14 | 2017-11-14 | Surface configuration and acoustic impedance binary cycle mutation micropunch ultrabroad band sound absorption structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108396667A (en) * | 2017-11-14 | 2018-08-14 | 同济大学 | Surface configuration and acoustic impedance binary cycle are mutated micropunch ultrabroad band sound absorption structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108396667A (en) * | 2017-11-14 | 2018-08-14 | 同济大学 | Surface configuration and acoustic impedance binary cycle are mutated micropunch ultrabroad band sound absorption structure |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180629 Termination date: 20201114 |
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| CF01 | Termination of patent right due to non-payment of annual fee |