CN206163123U - Combination microperforated panel and resonance sound absorbing structure - Google Patents
Combination microperforated panel and resonance sound absorbing structure Download PDFInfo
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- CN206163123U CN206163123U CN201621071780.XU CN201621071780U CN206163123U CN 206163123 U CN206163123 U CN 206163123U CN 201621071780 U CN201621071780 U CN 201621071780U CN 206163123 U CN206163123 U CN 206163123U
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- 238000004080 punching Methods 0.000 claims abstract description 13
- 238000009826 distribution Methods 0.000 claims abstract description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 24
- 239000000463 material Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 101100188552 Arabidopsis thaliana OCT3 gene Proteins 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B1/84—Sound-absorbing elements
- E04B1/86—Sound-absorbing elements slab-shaped
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model discloses a combination perforated plate combination microperforated panel, it inhales audio bandwidth, has better sound absorption effect. The suitable orifice plate of species group combination microperforated panel, the package rubbing board body, the plate body is circularly, and the thickness of plate body is 1mm, is equipped with a plurality of holes on the plate body, and punching rate is 3.805%, and a plurality of the hole regards as the central point to be radial symmetric distribution with the center of plate body, the hole includes mesopore and aperture, and mesoporous aperture is 2mm, and the aperture of aperture is 1mm. Furthermore, the utility model also discloses a resonance sound absorbing structure.
Description
Technical field
The utility model belongs to the technical field of resonance sound-absorbing, concretely relates to a kind of combination microperforated panel.This reality
A kind of resonance sound-absorbing structure is further related to new.
Background technology
At present noise pollution has been a great problem for perplexing people, and it suffers from serious harm to environment, human body.With
The continuous improvement of quality of life, noise control, noise reduction have become the necessary means of higher pursues of life.At present, China's city noise pollution day
Become serious, medium level of most cities in noise pollution, many regional noises have been higher than 60dB.The big multi-source of these noises
In road traffic, construction etc..The life of people of this Environmental perturbations, has caused various diseases, directly jeopardizes me
Physical and mental health, therefore noise has become a big public hazards of modern city.
In terms of sqouynd absorption lowering noise, sound-absorbing material is divided by structure, mainly includes sound-absorbing porous material and resonance sound-absorbing structure.
The sound absorbing mechanism of perforated plate sound-absorbing material, with sound-absorbing porous material have it is identical where, its difference be it be using resonance
The characteristics of, more effectively acoustic energy is converted into thermal energy consumption.Then most commonly seen with perforated plate in resonance sound-absorbing structure, it is by wearing
The thin plate in hole is constituted with the air layer of its behind.Because in resonance sound-absorbing structure, the material requirements to perforated plate is relative
It is relatively low, therefore perforated plate can be made up of materials such as aluminium sheet, steel plate, plastic plates and have protection against the tide, fire prevention, cleaning, high temperature resistant etc.
Feature.It is well known that the position of formant depends primarily on thickness of slab, aperture, punching rate, the several aspects of cavity depth, at other
Under conditions of parameter is constant, hole is have selection to the frequency range for absorbing sound, such as, as macropore, its formant is main generally at low frequency
To absorb sound for low-frequency range, then at intermediate frequency, mainly for Mid Frequency sound absorption, and the absworption peak of aperture then exists the absworption peak of mesopore
High frequency treatment, mainly for high band sound absorption.But, the shortcoming of perforated plate is then that sound sucting band is narrower, such as attached in resonant frequency
Closely, acoustic absorptivity is very high, approaches in 1, but a deviation resonance peak, acoustic absorptivity just rapid decline, therefore during it can only absorb
The single frequency tone of low-frequency range, this be also for a long time it the reason for the irreplaceable porous material in sound absorption field.
In terms of perforated plate sound sucting band is improved, Publication No. 205158899U, publication date are on 04 13rd, 2016
Chinese utility model patent discloses a kind of combination perforated plate.One kind combination perforated plate, including centre panel, the median surface
Plate is provided with from the center of circle to extraradial perforation, and the perforation is annularly distributed, the piercing aperture be 2～8mm, the perforation
Rate is 1～2%, and the air layer being made up of circular hose is provided with the centre panel；It is 1.39% in punching rate, the aperture
When the perforation gross area and aperture for 2mm is 3 for the ratio of the perforation gross area of 4mm, the acoustically effective of full range is best.But, this
The Δ f for planting the combination perforated plate of structure is only 691.7, acoustically effective SαfOnly 282.14.The sound sucting band of this perforated plate is also
It is relative narrower.
The content of the invention
The purpose of this utility model is to provide a kind of combination microperforated panel, its acoustic frequency bandwidth, with more excellent suction
Sound effective value.
To solve above-mentioned technical problem, what the purpose of this utility model was realized in：
One kind combination microperforated panel, including plate body, the plate body is rounded, and the thickness of plate body is 1mm, is provided with plate body
Multiple holes, punching rate is 3.805%, and multiple holes are radially symmetrical as central point using the center of plate body,
The hole includes mesopore and aperture, and the aperture of mesopore is 2mm, and the aperture of aperture is 1mm.
On the basis of such scheme and as the preferred version of such scheme：A diameter of 29mm of plate body, the mesopore
Quantity be 5, the quantity of aperture is 12.
On the basis of such scheme and as the preferred version of such scheme：The center of circle of 5 mesopores is distributed in an inner circle
On, and 5 mesopores are distributed in equally spaced manner；The center of circle of 12 apertures be distributed in one it is cylindrical on, and 12 apertures with
At equal intervals mode is distributed.
On the basis of such scheme and as the preferred version of such scheme：A diameter of 8mm of inner circle, outer diameter of a circle
For 16mm.
On the basis of such scheme and as the preferred version of such scheme：The plate body is rounded, the diameter of plate body
For 29mm, the quantity of the mesopore is 3, and the quantity of aperture is 20.
On the basis of such scheme and as the preferred version of such scheme：The center of circle of 3 mesopores is distributed in an inner circle
On, and 3 mesopores are distributed in equally spaced manner；The center of circle of 20 apertures be distributed in one it is cylindrical on, and 20 apertures with
At equal intervals mode is distributed.
The present invention also provides a kind of resonance sound-absorbing structure, including plate body, has multiple square areas on plate body, each
The length of side of the individual square area is 25.7mm, and 5 mesopores and 12 apertures are provided with each described square area,
The aperture of mesopore is 2mm, and the aperture of aperture is 1mm, and 1 mesopore in 5 mesopores is distributed in the center of square area, remaining
4 mesopores and 12 apertures it is radially symmetrical as central point using the center of the square area, plate body
Air layer is provided with below, and the thickness of plate body is 1mm.
On the basis of such scheme and as the preferred version of such scheme：The thickness of air layer is 21mm.
On the basis of such scheme and as the preferred version of such scheme：Remaining 4 mesopores and 12
Aperture is distributed over around the mesopore at the center of square area, and the center of circle structure of remaining 4 mesopores and 12 apertures
It is square at each into the center superposition of small one and large one two squares, the two foursquare centers and square area
The distance between adjacent center of circle in two holes is equal in shape.
On the basis of such scheme and as the preferred version of such scheme：The little foursquare length of side is 7.1mm, greatly
The foursquare length of side be 14.2mm.
The utility model is prominent and beneficial compared to existing technology to be had the technical effect that：
Combination microperforated panel of the present utility model, by arranging mesopore and aperture, punching rate is 3.805%, wherein, mesopore
Quantity less than the quantity of aperture, improve sound sucting band, and also significantly improve in terms of acoustically effective.
A kind of resonance sound-absorbing structure of the present utility model, by arranging mesopore and aperture, punching rate is 3.805%, is had
Wider sound sucting band and excellent acoustically effective.Further, since mesopore and aperture are distributed across in square area, just
In manufacture.
Description of the drawings
Fig. 1 is the schematic diagram of an embodiment of combination microperforated panel of the present utility model.
Fig. 2 is the schematic diagram of another embodiment of combination microperforated panel of the present utility model.
Fig. 3 is the schematic diagram of another embodiment of combination microperforated panel of the present utility model.
Fig. 4 is the schematic diagram of another embodiment of combination microperforated panel of the present utility model.
Fig. 5 is the schematic diagram of another embodiment of combination microperforated panel of the present utility model.
Fig. 6 is the schematic diagram of another embodiment of combination microperforated panel of the present utility model.
Fig. 7 is the schematic diagram of another embodiment of combination microperforated panel of the present utility model.
Fig. 8 is the schematic diagram of another embodiment of combination microperforated panel of the present utility model.
Fig. 9 is the schematic diagram of another embodiment of combination microperforated panel of the present utility model.
Figure 10 is the schematic diagram of another embodiment of combination microperforated panel of the present utility model.
Figure 11 is the schematic diagram of another embodiment of combination microperforated panel of the present utility model.
Figure 12 is the schematic diagram of another embodiment of combination microperforated panel of the present utility model.
Figure 13 is the schematic diagram of another embodiment of combination microperforated panel of the present utility model.
Figure 14 is the schematic diagram of another embodiment of combination microperforated panel of the present utility model.
Figure 15 is the schematic diagram of another embodiment of combination microperforated panel of the present utility model.
Figure 16 is the schematic diagram of resonance sound-absorbing structure of the present utility model.
Figure 17 is the distributed architecture schematic diagram of the mesopore in resonance sound-absorbing structure and aperture.
Figure 18 is another kind of distributed architecture schematic diagram of the mesopore in resonance sound-absorbing structure and aperture.
Figure 19 is another kind of distributed architecture schematic diagram of the mesopore in resonance sound-absorbing structure and aperture.
Figure 20 is another kind of distributed architecture schematic diagram of the mesopore in resonance sound-absorbing structure and aperture.
Figure 21 is another kind of distributed architecture schematic diagram of the mesopore in resonance sound-absorbing structure and aperture.
Figure 22 is another kind of distributed architecture schematic diagram of the mesopore in resonance sound-absorbing structure and aperture.
Figure 23 is another kind of distributed architecture schematic diagram of the mesopore in resonance sound-absorbing structure and aperture.
Figure 24 is another kind of distributed architecture schematic diagram of the mesopore in resonance sound-absorbing structure and aperture.
Specific embodiment
Below in conjunction with the accompanying drawings the utility model is further described with specific embodiment, referring to Fig. 1-Figure 24；
One kind combination microperforated panel, it can have wider sound sucting band in the range of frequency range 668-3240.2Hz.Referring to
Fig. 1-Figure 15, the combination microperforated panel includes plate body 1, and the plate body is rounded, and the thickness of plate body is 1mm, plate body it is a diameter of
29mm.In the present embodiment, the plate body is made using craft paper material.
It should be noted that, although plate body also possesses an intrinsic resonant frequency after perforation, it may have certain resonance
Acoustically effective, based on the Ji Li of resonance sound-absorbing, when sound wave incident, excites the air in hole to move reciprocatingly, and by with hole
The friction that wall occurs, and then part acoustic energy is converted into heat energy and consumes, and reaches the purpose of absorption of noise with this, it can be deduced that plate body
Impact of the material to acoustically effective itself it is very little, therefore, plate body is not limited to be made using craft paper material, can also adopt
With aluminium sheet, steel plate, plastic plate etc., other materials with certain degree of hardness are made.
Multiple holes are provided with plate body, hole penetrates plate body, and punching rate is 3.805%.Own in punching rate, i.e. plate body
The gross area in hole accounts for the percentage that plate body is provided with a surface in hole.It should be noted that in the utility model, punching rate is
3.805% is approximation.
Multiple holes are radially symmetrical as central point using the center of plate body.In one embodiment, the hole
Including mesopore 2 and aperture 3, the aperture of mesopore is 2mm, and the aperture of macropore is 1mm.The quantity of the mesopore is 5, the number of aperture
Measure as 12.To meet the requirement of radial symmetric distribution, the center of circle of 5 mesopores is distributed in an inner circle, and 5 mesopores with
At equal intervals mode is distributed；The center of circle of 12 apertures be distributed in one it is cylindrical on, and 12 apertures are distributed in equally spaced manner.
Generally, a diameter of 8mm of inner circle, cylindrical a diameter of 16mm.Using this structure, it is easy to test, to avoid being installed in test
When, it is cylindrical on hole be blocked and affect check accuracy.
It should be noted that because the wavelength of sound wave is much larger than the spacing between the two neighboring hole on same circle, therefore
Distance is very little to the impact for absorbing sound, and here can ignore completely.Therefore, inner circle, outer diameter of a circle can select it
Its parameter.
In the above-described embodiments, the quantity of the mesopore is 5, and the quantity of aperture is 12.The quantity of mesopore and aperture
Also above-mentioned number is not limited to, on the premise of punching rate is met for 3.805%, as another embodiment, the quantity of mesopore
Quantity to adopt 3, aperture then adopts 20.This some holes is radially symmetrical as central point using the center of plate body
Distribution.3 mesopores are distributed in inner circle, and 20 apertures are distributed on cylindrical.
In order to prove above-mentioned two scheme with wider sound sucting band and excellent acoustically effective, we give
Comparative example, we take large, medium and small three kinds of holes and carry out permutation and combination here, aperture be respectively the mesopore 2 of the macropore 4,2mm of 4mm and
The aperture 3 of 1mm.In order to ensure uniformity, macropore is distributed on the circle of a diameter of 4mm, and mesopore is distributed in the inner circle of a diameter of 8mm
On, aperture be distributed in a diameter of 16mm it is cylindrical on, plate body is made using the craft paper of a diameter of 29mm.Meeting punching rate P
On the premise of=3.805%, the assembled scheme such as following table (1～scheme of scheme 15 corresponds to respectively Fig. 1～Figure 15) of different pore size：
It should be noted that in table above, No. 10 scheme and No. 12 scheme are above-mentioned two embodiment
Content, 1～9,11 and 13～No. 15 schemes are comparative example content.
In experiment, the thickness of air layer adopts 21mm.
Experiment adopts following equipment：(must there are FFT, 1/3OCT and transfer function method acoustic absorptivity equipped with AWA6290M softwares
Measurement authorize) one, computer (CPN dominant frequency more than 2.5, more than internal memory 2G), and with signal generator software, AWA6223 sound
Calibrator 1, AWA6290B signal pickers one, the impedance tube one with loudspeaker (AWA8551 type impedance tubes), two 1/
4 microphones and corresponding prestage, AWA5871 power amplifiers and distribution are a plurality of.The velocity of sound is 34129cm/s.
After measure, 761.7-3064.5Hz is defined as into the selection frequency range of effective evaluation.
The half resonance frequency experimental result such as following table that Jing is measured.
Formant and its experimental result such as following table of corresponding acoustic absorptivity that Jing is measured.
In order to evaluate the acoustically effective in full frequency band, using average sound absorption coefficientWith the two things of frequency bandwidth Δ f
Reason amount.
Wherein, frequency bandwidth：Frequency bandwidth refers to the region between two and half resonant frequencies, and it is mainly by sound absorber itself
Structural parameters determined, it be evaluate sound absorbing capabilities an important indicator, be typically expressed as：
Δ f=f2 *-f1 *
In formula, f1 *And f2 *Corresponding frequency when for acoustic absorptivity being maximum half, can be described as half resonant frequency again.
Average sound absorption coefficient：Average sound absorption coefficient refers to the average of the acoustic absorptivity in certain band limits.It equally may be used
To weigh acoustically effective of the sound absorber in a certain frequency range.It is typically expressed as：
Understood using the imfinitesimal method in physics,It is exactly the α-f curves of perforated plate in full frequency band and reference axis institute
The area for enclosing, its big I is rough to be represented with multiple little trapezoidal area sums in figure：
The number of institute's gathered data in frequency range (n for)
Wherein f1And f2For the bound frequency of selected frequency range, can determine according to the actual needs.
Absorption area：In order to easy from average sound absorption coefficientAnd two aspects of frequency bandwidth Δ f are imitated to evaluate to absorb sound
Really, here we introduce a new physical quantity-absorption area Sαf, it is come by the product of average sound absorption coefficient and frequency bandwidth
Represent：
Whereby, the index for evaluating acoustically effective, such as following table are obtained：
As can be known from the above table, adopt the combination quantity of aperture (quantity of mesopore less than) of mesopore and aperture, punching rate for
3.805% perforated plate, has widened in sound sucting band on the whole, acoustically effective has relative to existing combination microperforated panel
Improved.When the combination of big aperture is more appropriate (such as scheme 5,10,11,12,13,14), the acoustically effective of microperforated panel is combined very
It is good, hence it is evident that better than traditional structure, to be mainly shown as that average sound absorption coefficient is increased slightly, sound sucting band is also substantially widened.But when big
When aperture combination is less appropriate (such as scheme 2,3,4,6,8), its acoustically effective just may not be certain better than traditional structure, have even
It is substantially also poor than traditional, sound sucting band also relative narrower.And the scheme of scheme 10,12 is adopted, equal acoustic absorptivity increases, and inhales
Sonic-frequency band is most wide, and acoustically effective is optimum.
As shown in figure 16, also a kind of resonance sound-absorbing structure of the utility model, including plate body 1, on plate body have it is multiple just
Square region 10, the length of side of each square area is 25.7mm, and in each described square area 5 are provided with
Mesopore 2 and 12 apertures 3, the aperture of mesopore is 2mm, and the aperture of aperture is 1mm, and 1 mesopore in 5 mesopores is distributed in pros
The center in shape region, remaining 4 mesopores and 12 apertures are using the center of the square area as central point in radiation
Shape is symmetrical, and air layer is provided with behind plate body, and the thickness of plate body is 1mm.Preferably, the thickness of air layer is 21mm.
It is radially symmetrical as mesopore and aperture in embodiment using the plate body with multiple square areas
Can be in the following way：Remaining 4 mesopores and 12 apertures are distributed in the center of square area
Around hole, and the center of circle of remaining 4 mesopores and 12 apertures constitutes small one and large one two squares, the two squares
Center and square area center superposition, the distance phase in each square between the center of circle in two adjacent holes
Deng in the present embodiment, the length of side of little square 101 is 7.1mm, and the length of side of big square 102 is 14.2mm.Specifically
Ground, as shown in Figure 18.
It should be noted that mesopore and aperture are radially symmetrical can also such as be shown using other examples in Fig. 2
Structure shown in example 17, Figure 19～Figure 24.
Above-described embodiment is only preferred embodiment of the present utility model, and protection model of the present utility model is not limited according to this
Enclose, therefore：All equivalence changes done according to structure of the present utility model, shape, principle, all should be covered by protection of the present utility model
Within the scope of.
Claims (10)
1. a kind of combination microperforated panel, including plate body, it is characterised in that：The plate body is rounded, and the thickness of plate body is 1mm,
Plate body is provided with multiple holes, and punching rate is 3.805%, and multiple holes using the center of plate body as central point radially
Symmetrical, the hole includes mesopore and aperture, and the aperture of mesopore is 2mm, and the aperture of aperture is 1mm, and the quantity of mesopore is less than
The quantity of aperture.
2. combination microperforated panel according to claim 1, it is characterised in that：A diameter of 29mm of plate body, the mesopore
Quantity is 5, and the quantity of aperture is 12.
3. combination microperforated panel according to claim 2, it is characterised in that：The center of circle of 5 mesopores is distributed in an inner circle,
And 5 mesopores are distributed in equally spaced manner；The center of circle of 12 apertures be distributed in one it is cylindrical on, and 12 apertures with etc. between
Away from mode be distributed.
4. combination microperforated panel according to claim 2, it is characterised in that：A diameter of 8mm of inner circle, cylindrical is a diameter of
16mm。
5. combination microperforated panel according to claim 1, it is characterised in that：The plate body is rounded, plate body it is a diameter of
29mm, the quantity of the mesopore is 3, and the quantity of aperture is 20.
6. combination microperforated panel according to claim 5, it is characterised in that：The center of circle of 3 mesopores is distributed in an inner circle,
And 3 mesopores are distributed in equally spaced manner；The center of circle of 20 apertures be distributed in one it is cylindrical on, and 20 apertures with etc. between
Away from mode be distributed.
7. a kind of resonance sound-absorbing structure, including plate body, it is characterised in that：There are multiple square areas on plate body, each
The length of side of the square area is 25.7mm, and 5 mesopores and 12 apertures are provided with each described square area, in
The aperture in hole is 2mm, and the aperture of aperture is 1mm, and 1 mesopore in 5 mesopores is distributed in the center of square area, remaining
4 mesopores and 12 apertures are radially symmetrical as central point using the center of the square area, after plate body
Face is provided with air layer, and the thickness of plate body is 1mm.
8. resonance sound-absorbing structure according to claim 7, it is characterised in that：The thickness of air layer is 21mm.
9. resonance sound-absorbing structure according to claim 8, it is characterised in that：Remaining 4 mesopores and 12 it is little
Pore size distribution is around the mesopore positioned at the center of square area, and the center of circle of remaining 4 mesopores and 12 apertures is constituted
Small one and large one two squares, the two foursquare centers with the center superposition of square area, it is square at each
The distance between adjacent center of circle in two holes is equal in shape.
10. resonance sound-absorbing structure according to claim 9, it is characterised in that：The little foursquare length of side is 7.1mm, greatly
The foursquare length of side be 14.2mm.
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| CN106251854A (en) * | 2016-06-22 | 2016-12-21 | 潘路希 | Combination perforated plate and resonance sound-absorbing structure |
| CN107039028A (en) * | 2017-06-02 | 2017-08-11 | 郭辰曦 | A kind of performance test methods of wideband perforated plate |
| CN107237413A (en) * | 2017-06-07 | 2017-10-10 | 浙江农林大学 | A kind of programmable combination hole sound absorbing material |
| CN112779998A (en) * | 2020-12-31 | 2021-05-11 | 南京大学 | Full-band super-structure sound absorber |
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| CN108916939A (en) * | 2018-07-14 | 2018-11-30 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with the cellular noise filtering device by arrangement area distribution |
| CN108954432A (en) * | 2018-07-14 | 2018-12-07 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator having multi-frequency noise filtering device |
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| CN109285534A (en) * | 2018-11-06 | 2019-01-29 | 株洲国创轨道科技有限公司 | Sound absorber |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201011616Y (en) * | 2006-09-12 | 2008-01-23 | 浙江大学 | Perforated plate for improving acoustic absorption property |
| CN201358564Y (en) * | 2009-02-11 | 2009-12-09 | 薛小民 | Micro-perforated aluminium foil |
| CN101645263B (en) * | 2009-02-27 | 2011-05-11 | 中国科学院声学研究所 | Composite resonance sound absorption device of tube bundle perforated plate |
| CN101725313B (en) * | 2009-12-15 | 2011-08-10 | 清华大学 | Porous sound absorption window |
| CN103500576A (en) * | 2013-09-26 | 2014-01-08 | 久恩金属制品(昆山)有限公司 | Microporous sound-absorbing plate and production method thereof |
| CN205158899U (en) * | 2015-10-29 | 2016-04-13 | 潘路希 | Combination perforated plate |
| CN106251854B (en) * | 2016-06-22 | 2023-06-27 | 潘路希 | Combined perforated plate and sound absorption structure of combined perforated plate |
-
2016
- 2016-09-22 CN CN201610841716.3A patent/CN106251854B/en active Active
- 2016-09-22 CN CN201621071780.XU patent/CN206163123U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106251854A (en) * | 2016-06-22 | 2016-12-21 | 潘路希 | Combination perforated plate and resonance sound-absorbing structure |
| CN107039028A (en) * | 2017-06-02 | 2017-08-11 | 郭辰曦 | A kind of performance test methods of wideband perforated plate |
| CN107039028B (en) * | 2017-06-02 | 2023-06-13 | 郭辰曦 | Performance test method of broadband perforated plate |
| CN107237413A (en) * | 2017-06-07 | 2017-10-10 | 浙江农林大学 | A kind of programmable combination hole sound absorbing material |
| CN107237413B (en) * | 2017-06-07 | 2020-11-03 | 浙江农林大学 | Designable combined hole sound absorption material |
| CN112779998A (en) * | 2020-12-31 | 2021-05-11 | 南京大学 | Full-band super-structure sound absorber |
| CN112779998B (en) * | 2020-12-31 | 2022-04-22 | 南京大学 | Full-band super-structure sound absorber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106251854A (en) | 2016-12-21 |
| CN106251854B (en) | 2023-06-27 |
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