CN207156595U - A kind of broadband sound absorption structure Wood composite flitch - Google Patents
A kind of broadband sound absorption structure Wood composite flitch Download PDFInfo
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- CN207156595U CN207156595U CN201721230048.7U CN201721230048U CN207156595U CN 207156595 U CN207156595 U CN 207156595U CN 201721230048 U CN201721230048 U CN 201721230048U CN 207156595 U CN207156595 U CN 207156595U
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- wood
- sound absorption
- honeycomb
- absorption structure
- cavity
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Abstract
The utility model discloses a kind of broadband sound absorption structure Wood composite flitch, including wood wool board, honeycomb sandwich layer, papery thin layer and the wood moulding cavity plate set gradually；Wood wool board is provided with multiple holes；Honeycomb sandwich layer is provided with multiple honeycomb chambers in honeycomb arrangement；Wood moulding cavity plate is provided with cavity towards the side of papery thin layer, and the mineral wool for fitting in cavity bottom is provided with cavity.Wood composite flitch with the sound absorption structure, there is significant noise reduction for high-frequency noise and Middle and low frequency noise, the frequency range that absorbs sound is wider.
Description
Technical field
Composite wooden material technical field is the utility model is related to, it is wooden multiple more particularly to a kind of broadband sound absorption structure
Condensation material plate.
Background technology
Sound-absorbing material, when being with certain material for absorbing acoustic energy, lowering ambient noise performance, either control reverberation
Between, reduce noise, improve sound diffusion and eliminate tonequality defect, be required for using sound-absorbing material, study the acoustics of sound absorption structure
Architectural acoustics and Noise measarement can be had important practical significance.In construction and decoration technical field, the wood with sound absorption structure
Composite material is a kind of constructional ornamental material of a variety of occasion widespread demands such as office or inhabitation.
At present, the Wood composite flitch with sound absorption structure known to the public, has in a certain frequency range mostly
Higher acoustic absorptivity.General porous material mainly absorbs more than 500Hz noises, but low frequency noise reduction is relatively poor.Example
Such as, a kind of Micropunch plate with fibers penetrating into micropores structure in the prior art, selects common sheet metal thickness to be worn for 1-500mm with millimeter
Level micropore, is prepared into microperforated panel, is provided with microperforated panel and walks the filament of arrangement up and down, and fibre diameter is from 1-100 microns
Scope, fiber penetration rate 1-100%.The wooden sound absorption structure of this microperforated panel structure, for lower frequency limit 436Hz, the upper limit
Frequency 1538Hz, width be the acoustic absorptivity of the noise in 1102Hz frequency ranges more than 0.5, but for more low frequency or
The acoustically effective of the noise of person's higher frequency is poor.
To sum up, wood composite sound-absorbing material of the prior art is narrow in the presence of sound absorption frequency range, and full range noise reduction does not show
The technical problem of work.
Utility model content
The purpose of this utility model is to provide a kind of broadband sound absorption structure Wood composite flitch, to solve prior art
In sound absorption frequency range it is narrow, the inapparent technical problem of full range noise reduction.
To achieve the above object, the utility model provides following scheme：
A kind of broadband sound absorption structure Wood composite flitch, including the wood wool board that sets gradually, honeycomb sandwich layer, papery are thin
Layer and wood moulding cavity plate；
The wood wool board is provided with multiple holes；
The honeycomb sandwich layer is provided with multiple honeycomb chambers in honeycomb arrangement；
The wood moulding cavity plate is provided with cavity towards the side of the papery thin layer, is provided with the cavity and fits in cavity
The mineral wool of bottom.
Preferably, the wood wool plate thickness is 3-9mm, density 130kg/m3-215kg/m3。
Preferably, the punching rate of the wood wool board is 9%, pitch-row 10mm, aperture 6mm.
Preferably, the honeycomb sandwich layer is honeycomb sandwich layer made of cardboard, and thickness degree is 10-30mm.
Preferably, the deflection of the honeycomb sandwich layer be 1000-1500gcm, grammes per square metre 600-700g/m2。
Preferably, the depth of the honeycomb chamber is 10-30mm.
Preferably, the depth of the cavity in the wood moulding cavity plate is 10-30mm.
Preferably, the wood wool plate thickness is 9mm, density 215kg/m3, the depth 30mm of the honeycomb chamber, the wood
Mould the cavity depth 30mm in cavity plate.
Preferably, the wood moulding cavity plate is provided with tongue-and-groove and tenon for mortise-tenon joint.
According to specific embodiment provided by the utility model, the utility model discloses following technique effect：
Broadband sound absorption structure Wood composite flitch provided by the utility model, disclose a kind of brand-new sound absorption knot
Structure, the sound absorption structure include successively order set the wood wool board of loose structure, the honeycomb core plate of multi-cavity structure, papery thin layer and
Wood moulding cavity plate provided with cavity, structure at all levels collectively form a complete sound absorption structure, wherein, wood wool board and honeybee
Nest sandwich layer is combined equivalent to a Hai Muhuoci resonant absorber is formd, and is pressed down for high-frequency noise and Middle and low frequency noise
System, multiple honeycomb chambers of honeycomb core plate are ante-chamber, and the cavity in wood moulding cavity plate is big back cavity, and the setting of back cavity can rub
Heat energy is converted to retardance acoustic energy, while multiple honeycomb ante-chambers are corresponding with a wood moulding back cavity has combined to form front and rear chamber and resonate
Sound absorption structure, surface material effective thickness is improved, along with the vibration of the papery thin layer between wood moulding cavity plate and honeycomb sandwich layer,
Further dissipate low-frequency noise, through experimental tests, and the utility model is by wood wool board, honeycomb core plate, papery thin layer and wood moulding cavity
The overall sound absorption structure formed is combined, has preferable noise reduction for high-frequency noise and Middle and low frequency noise.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description are only of the present utility model
Some embodiments, for those of ordinary skill in the art, without having to pay creative labor, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is the structural representation for the broadband sound absorption structure Wood composite flitch that the utility model embodiment provides.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
It is new to this practicality with reference to embodiment to make upper technical scheme of the present utility model more obvious understandable
Type is described in further detail.
Embodiment one
A kind of broadband sound absorption structure Wood composite flitch shown in Figure 1, that the utility model embodiment one provides,
Including wood wool board 1, honeycomb sandwich layer 2, papery thin layer 3 and the wood moulding cavity plate 4 set gradually.
Wherein, wood wool board 1 is provided with multiple holes 11；Honeycomb sandwich layer 2 is honeycomb plate structure, by multiple with certain depth
Honeycomb chamber 21 forms, and multiple honeycomb chambers 21 are in honeycomb arrangement；Wood moulding cavity plate 4 is provided with cavity towards the side of papery thin layer 3
41, cavity 41 is interior to be provided with the mineral wool (not shown in figure 1) for fitting in cavity bottom.
The thickness of wood wool board 1 can be 3-9mm, density 130kg/m3-215kg/m3。
In the present embodiment one, as a kind of embodiment, the thickness of wood wool board 1 is 3mm, density 130kg/m3。
Wood wool board 1 is typical porous sound-absorbing material, in addition to having good acoustically effective, its light, tension and
Shock proof mechanical property is good, also provides facility for transport.
Honeycomb sandwich layer 2 is honeycomb sandwich layer made of cardboard, and thickness degree is 10-30mm.The deflection of honeycomb sandwich layer 2 is 1000-
1500gcm, grammes per square metre 600-700g/m2.Preferably as a kind of embodiment, in the utility model embodiment one,
The thickness degree of honeycomb sandwich layer is 10mm.
The most selection brown paper of the raw material of honeycomb sandwich layer 2 or similar paper material, carry out gluing and obtain hexagon
Refill, intensity can be improved by impregnating glue, be similar to honeycomb.This kind of hollow material has the advantages that light, the ratio of strength to weight is high, together
When can play buffering and sound insulation effect.
The predetermined depth of honeycomb chamber 21 is 10-30mm, and the depth of the cavity in wood moulding cavity plate is 10-30mm.It is preferred that
Ground, in the utility model embodiment one, the depth of honeycomb chamber is 10mm, and the depth of the cavity 41 in wood moulding cavity plate is
10mm.Cavity in wood moulding cavity plate is preferably a big chamber, or multiple, the specific size and every block of sheet material of its cavity
The cavity particular number of upper setting can by those skilled in the art according to reality board dimension and load-bearing it needs to be determined that, this reality
Do not enumerated with new.
In the utility model embodiment, the material of papery thin layer 3 can be brown paper or craft paper, and thickness is
0.5mm-2mm。
In the utility model embodiment, used by wood moulding cavity plate material be by fiber or powdered wood materials or
String and the compound obtained composite wood of thermoplastic.Its remarkable advantage is to overcome wood materials existing by adding plastics
Deficiency, as plastics have good humidity resistance, which overcome pure solid wood is non-moistureproof, easy corruption, is also easy to produce cracking, sticks up
The drawbacks such as song, aging.In addition Wood-plastic material recoverable, environmentally friendly material is belonged to, and Wood-plastic material is different from needing
Gluing connection wood-based plate, avoid because phenolic aldehyde, urea-formaldehyde glue use and caused by formaldehyde, be more beneficial for health, belong to ring
Protect material.But acoustically effective of undressed wood moulding itself is poor, common wood moulding sound-absorbing material is more in the form of opening on the market
Make acoustic board.
The utility model embodiment one provides a kind of Wood composite flitch with brand-new sound absorption structure, wherein wood
The cavity of modeling cavity plate is designed to by rubbing and block, convert acoustic energy into heat energy, and the mineral wool of intracavitary is porous material,
Can play Noise Reduction to high-frequency noise, wood wool board and honeycomb sandwich layer form Hai Muhuoci resonance sound-absorbing structures, honeycomb ante-chamber with
Wood moulding back cavity correspondence forms two-chamber sound absorption structure, and the papery thin layer that centre is set then passes through dissipation of vibrations low-frequency noise.By
The sound absorption structure that above layers time combine, on the whole can be to high-frequency noise and middle low frequency by the structure design of uniqueness
Noise has a preferable noise reduction, and sound sucting band is wider.
Embodiment two
In the utility model embodiment two, the thickness of wood wool board is 6mm, density 187kg/m3, honeycomb core layer thickness
For 20mm, the cavity depth in bottom wood moulding cavity plate is 20mm.Other structures parameter repeats no more with embodiment one.
Embodiment three
The utility model embodiment three is a preferred embodiment, in the present embodiment three, the optimum combination of the sound absorption structure
Parameter is wood wool plate thickness 9mm, density 215kg/m3, the punching rate of wood wool board is 9%, pitch-row 10mm, aperture 6mm.Honeybee
The honeycomb ante-chamber depth of nest sandwich layer is 30mm, and cavity (back cavity) depth in wood moulding cavity plate is 30mm, and other structures parameter is same
Embodiment one, is repeated no more.
Shown in Figure 1 in the utility model embodiment three, wood moulding cavity plate is provided with the tongue-and-groove for mortise-tenon joint
And tenon.
In the actual architectural engineering of prior art, to reach suitable acoustic efficiency, cavity is left behind in sound absorber,
But the realization of the cavity in existing Sound absorption design will splice by lightgage steel joist, it means that keel shoe, wall are completed during installation
The fixation of multiple tie points between body, sound-absorbing material, cumbersome installation had not only expended time cost but also had needed labour cost.Meanwhile because
The deadweight of keel shoe and length, the carrying in transportation are also not convenient.Therefore, consider from financial cost, in the prior art
Sound absorption structure design, in addition to the price of sound-absorbing material in itself, also exist installation and transport when high fringe cost.This practicality
The sound absorption structure of new offer, mortise-tenon joint between wood moulding cavity plate, without lightgage steel joist, therefore use suction of the present utility model
Acoustic form, meet the light material of and can alternative metals keel while structural strength, installation procedure is convenient and swift, makes to be mounted to
Originally substantially reduce.
Broadband sound absorption structure Wood composite flitch provided by the utility model, further optimize multiple-layer absorbers
Full-frequency sound absorption effect, using wood wool board as surface material, honeycomb paper core is core material, increases wood moulding cavity layer after honeycomb,
Wood moulding can be further enhanced while back cavity effect is ensured mechanical property and for installation when mortice opening, fixedly connected part carry
Supplier is just.Papery thin layer will be added between honeycomb and wood moulding, obtain four layers of composite sound-absorbing material.By design the thickness of wood wool board with
This four structural parameters of density, honeycomb thickness, wood moulding cavity depth, influence of the analysis Different structural parameters to acoustically effective, are obtained
To the related process parameters and optimal procedure parameters that can play full-frequency sound absorption effect, related process parameters disclosed above,
Preferable broadband acoustically effective can be reached, solve low frequency noise reducing less effective, the suitable full range of shortage in the prior art
The technical problem of high noise reduction sound absorber.
Specifically, through experimental tests, the acoustic absorptivity of the sound-absorbing material set using technical solutions of the utility model is tested
As a result referring to table 1, wherein 1-3 is three groups of the utility model sound-absorbing material test samples, and from table 1, the utility model provides
Sound absorption structure, the acoustic absorptivity average in 125Hz-2000Hz broad frequency bands reaches 0.673, and acoustically effective is preferable.Table 2 is
The acoustic absorptivity test result of sound-absorbing material common in the art, its acoustic absorptivity are only capable of reaching 0.326.
Table 1
Table 2
Specific case used herein is set forth to principle of the present utility model and embodiment, above example
Explanation be only intended to help and understand method and its core concept of the present utility model；Meanwhile for the general technology of this area
Personnel, according to thought of the present utility model, there will be changes in specific embodiments and applications.In summary,
This specification content should not be construed as to limitation of the present utility model.
Claims (9)
1. a kind of broadband sound absorption structure Wood composite flitch, it is characterised in that including wood wool board, the honeycomb core set gradually
Layer, papery thin layer and wood moulding cavity plate；
The wood wool board is provided with multiple holes；
The honeycomb sandwich layer is honeycomb plate structure, provided with multiple in honeycomb arrangement, the honeycomb chamber with predetermined depth；
The wood moulding cavity plate is provided with cavity towards the side of the papery thin layer, is provided with the cavity and fits in cavity bottom
Mineral wool.
2. broadband sound absorption structure Wood composite flitch as claimed in claim 1, it is characterised in that the wood wool plate thickness
For 3-9mm, density 130kg/m3-215kg/m3。
3. broadband sound absorption structure Wood composite flitch as claimed in claim 2, it is characterised in that the wood wool board is worn
Porosity is 9%, pitch-row 10mm, aperture 6mm.
4. broadband sound absorption structure Wood composite flitch as claimed in claim 1, it is characterised in that the honeycomb sandwich layer is
Honeycomb sandwich layer made of cardboard, thickness degree are 10-30mm.
5. broadband sound absorption structure Wood composite flitch as claimed in claim 4, it is characterised in that the honeycomb sandwich layer
Deflection is 1000-1500gcm, grammes per square metre 600-700g/m2。
6. broadband sound absorption structure Wood composite flitch as claimed in claim 1, it is characterised in that the honeycomb chamber it is pre-
If depth is 10-30mm.
7. broadband sound absorption structure Wood composite flitch as claimed in claim 1, it is characterised in that the wood moulding cavity plate
On the depth of cavity be 10-30mm.
8. broadband sound absorption structure Wood composite flitch as claimed in claim 7, it is characterised in that the wood wool plate thickness
For 9mm, density 215kg/m3, the depth 30mm of the honeycomb chamber, the cavity depth 30mm in the wood moulding cavity plate.
9. the broadband sound absorption structure Wood composite flitch as described in claim any one of 1-8, it is characterised in that the wood
Mould cavity plate and be provided with the tongue-and-groove and tenon for being used for mortise-tenon joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721230048.7U CN207156595U (en) | 2017-09-22 | 2017-09-22 | A kind of broadband sound absorption structure Wood composite flitch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721230048.7U CN207156595U (en) | 2017-09-22 | 2017-09-22 | A kind of broadband sound absorption structure Wood composite flitch |
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| Publication Number | Publication Date |
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| CN207156595U true CN207156595U (en) | 2018-03-30 |
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| CN201721230048.7U Expired - Fee Related CN207156595U (en) | 2017-09-22 | 2017-09-22 | A kind of broadband sound absorption structure Wood composite flitch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108422729A (en) * | 2017-09-22 | 2018-08-21 | 东北林业大学 | A kind of broadband sound absorption structure Wood composite flitch |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108422729A (en) * | 2017-09-22 | 2018-08-21 | 东北林业大学 | A kind of broadband sound absorption structure Wood composite flitch |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180330 Termination date: 20190922 |