CN206289549U - Outdoor composite sound absorbing module - Google Patents
Outdoor composite sound absorbing module Download PDFInfo
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- CN206289549U CN206289549U CN201621373341.4U CN201621373341U CN206289549U CN 206289549 U CN206289549 U CN 206289549U CN 201621373341 U CN201621373341 U CN 201621373341U CN 206289549 U CN206289549 U CN 206289549U
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Abstract
The utility model discloses a kind of outdoor composite sound absorbing module, it is made up of microperforated panel, metal framework structure, weatherability acoustic board, metal finishing sound insulationg board, the described side knuckle of metal finishing sound insulationg board four, metal finishing sound insulationg board is installed in the metal framework structure back side, weatherability acoustic board is arranged in metal framework structure, microperforated panel is arranged on metal framework structure front, and described metal framework structure thickness is 80~150mm.Described weatherability acoustic board system unit weight is the melamine acoustical foam board of 9~12kg/m3.Described microperforated panel tie-plate thickness be the galvanized steel plain sheet of 0.5~0.8mm, punching aperture be 0.8mm, punching rate be 1.5~4%.Described polylith open air composite sound absorbing module is installed on sound barrier load-carrying construction frame out of doors, and 8~15mm gaps are left between outdoor composite sound absorbing module, is closed using structure glue, forms integral type sound barrier.
Description
Technical field
The utility model is related to a kind of sound absorption structure, the compound suction in open air especially out of doors with sound absorption, sound insulation function
Sound module.
Background technology
Out of doors in acoustic barrier design, traditional method often uses the porous material conduct such as centrifugally glass-wool, rock wool
Sound absorption structure.Due under the conditions of use environment temperature change, sleet out of doors porous material easily make moist and influence sound absorption
It is effect, easily brittle and sound absorbing capabilities are lost caused by forming powder, forming powder.As pure sound insulating structure, influence
The use function of sound barrier.Resistive sound absorption structure, particularly now widely used traditional porous fibrous sound-absorbing material, ore deposit
Fibres material, has been environmentally protected the criticism with health care professionals in recent years, and its pollution Environmental insults be harmful to.It is right
While Noise Control, and the environment of the sanitation and hygiene needed to people causes new pollution, and this is worthless.
The microperforated panel soundabsorbing construction initiated by Acoustics In China authority's Ma Dayou, is exactly the base in sound absorbent perforated structure
On plinth, the aperture of perforation is narrowed down to below millimeter, punching rate≤4%, form microperforated panel soundabsorbing construction, hole can be increased in itself
Acoustic resistance, can just obtain satisfied acoustic absorptivity without additional porous material.Architectural acoustics aspect has been obtained extensively indoors
Application.This using microperforated panel soundabsorbing construction on sound barrier out of doors also to having started wide prospect.Microperforated panel absorbs sound
Structure is a kind of quality in a low voice, the new sound absorption structure of acoustic resistance high.Further, it may have do not limited by material, cleaned, it is free of contamination
Feature, is widely used.
Microperforated panel soundabsorbing construction system resonance sound-absorbing structure, its acoustics person's character is its acoustic impedance, actually exactly it
Determine the acoustical behavior index of sound absorption structure.Research shows, characterizes the acoustic absorptivity and bandwidth of microperforated panel sound absorption characteristics
Degree, mainly by the acoustic mass m and acoustic resistance of microperforated panel structureTo determine, and the two factors and micro-pore diameter d and perforation
Rate P is relevant.Sound absorption frequency 0 is inversely proportional with the square root of aperture d, and aperture d is doubled, and resonant frequency 0 accordingly reduces by 1/2 frequency multiplication
Journey.Because the influence of the size to acoustic resistance of perforation panel aperture d is very big, acoustic resistance increases with the inverse square in aperture, therefore reduces hole
Footpath can effectively increase acoustic resistance.With the reduction of person aperture d, high frequency sound absorbing capabilities are improved, low frequency absorption hydraulic performance decline.Reduce
Aperture d, the peak value of resonance sound-absorbing increases aperture d to high-frequency mobile, and the peak value of resonance sound-absorbing is moved to low frequency；Sound absorption frequency 0
Square root to punching rate P is directly proportional, and punching rate P is doubled, and resonant frequency 0 accordingly improves 1/2 octave.Punching rate can influence
Resonant frequency, punching rate increase, resonant frequency will be directly proportional to high frequency offset, side-play amount to the radical sign of opening of punching rate.Punching rate
Increase, " mountain peak " of the frequency characteristic that absorbs sound will be to high-frequency mobile.
If widening resonance sound-absorbing frequency bandwidth, medium-high frequency sound wave is absorbed, improve acoustic absorptivity.Can be using diminution hole
Footpath d reaches ultramicropore（d≤0.2mm）.But, the main difficulty of ultra-microporous is the processing and whole sound absorption of substantial amounts of micropore
The technological problemses of structure.If reducing the aperture d of microperforated panel, the mode of laser beam perforation or electrochemistry must be just taken, made
Processing cost steeply rises.Meanwhile, out of doors under the conditions of, because environment dust is more, blocking is easily caused to ultramicro plate,
Or punching rate is improved, but, low frequency absorption amount is affected again more than more than 4% punching rate.
Because the resonant frequency of micropunch resonant structure is closely related with cavity depth, to expect relatively low resonance frequently
Rate is, it is necessary to larger chamber depth.In addition, the sound sucting band width of micropunch resonant structure is narrower, proposed to widen sound sucting band
Double-deck micropunch resonant structure.In order to obtain broadband high-selenium corn effect, add one layer of micropunch again after microperforated panel structure
Plate and cavity double resonance device.According to the theory of double-deck microperforated panel structure, widen absorption region frequency band, and make absorption model
Enclose interior sound absorption frequency characteristic more flat.But, the restriction of cost is subject to processing again.
Due to the influence of above factors, cause practical engineering application of the microperforated panel structure out of doors in terms of sound barrier
There are problems.
Melamine foam（Nanosponges, melamine sponge, magic sponge, magical sponge, U.S.A receive ware sponge）
It is a kind of low-density, high opens sky rate, flexible foamed plastics.Melamine foam has remarkable anti-flammability, sound absorption properties
And thermal insulation, the coke layer of densification is formed so as to block burning on the surface of burner body after contact naked light, without drip, non-toxic gas
Body discharges, and smoke density is less than 15, from fiery self-extinguishment.
Superpower acoustical absorptivity：It is up to the deep layer that more than 95% percent opening enables sound wave entrance foams easily and effectively
And be changed into the shock energy of grid and be consumed and sponge, and effectively eliminate back wave.Well insulated heat insulating ability：Its percent opening
Up to more than 95%, three dimensional network structure makes the convection heat transfer' heat-transfer by convection of air effectively be blocked.Temperature tolerance is strong：Suitable long-term work
Under -165 °C Celsius to 180 °C conditions of work, -165 °C to 200 °C without decomposition and metaboly.Low unit weight：Product unit weight exists
2 ~ 20kg/m3, is foamed plastics most light at present.Non-toxic sanitary security：The chemical constitution and cross-linking system of its stabilization make it
With unique chemical stability, country is fully met on the green of the fields such as interior decoration, commodity and vehicles noise reduction
Colour circle ensures safety standard.
The content of the invention
The purpose of this utility model is the advantage according to microperforated panel soundabsorbing construction, with reference to double-deck micropunch resonant structure
Principle, there is provided a kind of cost is relatively low, sound sucting band outdoor composite sound absorbing module wider.
The utility model solves the technical scheme that its technical problem used：A kind of outdoor composite sound absorbing module, by micro-
Perforated plate, metal framework structure, weatherability acoustic board, metal finishing sound insulationg board composition, the described side of metal finishing sound insulationg board four
Knuckle, metal finishing sound insulationg board are arranged on the metal framework structure back side, and weatherability acoustic board is arranged in metal framework structure, micro-
Perforated plate is arranged on metal framework structure front, and described metal framework structure thickness is 80~150mm.Microperforated panel is formed to be total to
Shake cavity sound absorption structure.
Described weatherability acoustic board system unit weight is the melamine acoustical foam board of 9~12kg/m3.Melamine sound-absorbing
The excellent full-frequency sound absorption feature of cystosepiment, is conducive to improving medium-high frequency wave absorption ability.Meanwhile, with countless small holes
Melamine acoustical foam board, equivalent to microperforated panel soundabsorbing construction, forms double-deck in microperforated panel and metal finishing sound insulationg board
Micropunch resonant structure, further widens wide band sound absorption.Melamine acoustical foam board is as the general unit weight of sound-absorbing material
8kg/m2, the micro-pore of formation is larger, and unit weight is that the melamine acoustical foam board hole of 9~12kg/m2 is smaller, the number in hole
Amount is more, advantageously forms ultra-microporous, meanwhile, acoustical foam board is more strong, is conducive to independently installed.
Described microperforated panel tie-plate thickness is that the galvanized steel plain sheet of 0.5~0.8mm, punching aperture are 0.8mm, and punching rate is
1.5~4%.Under current process conditions, using the technique piercing aperture of mechanical punching if less than 0.8mm, red needle will be easy
Fracture, cause yield rate to reduce, punching cost will be increased sharply.Punching aperture is the critical point that 0.8mm is mechanical punching, aperture
It is larger to advantageously reduce cost.Simultaneously, it is ensured that the absorption of low-frequency sound wave.Four side knuckle fastenings of described metal finishing sound insulationg board
In metal framework structure side.System keeps the complete dicoration of metal finishing sound insulationg board.Outdoor composite sound absorbing module is arranged on
On outdoor sound barrier load-carrying construction frame, 8~15mm gaps are left between outdoor composite sound absorbing module, closed using structure glue, shape
The good sound barrier of integral formula landscape effect.
Described melamine acoustical foam board system is arranged on middle part, the micropunch backboard of microperforated panel metal framework structure
Before face or metal finishing sound insulationg board.Melamine foaming acoustic board is disposed in cavity, it will change cavity acoustic reactance, mainly etc.
It is the deep change in chamber to imitate；The damping characteristic of acoustic board simultaneously because melamine foams, cavity will can no longer be equivalent to " pure " sound
It is anti-, will also be including acoustic resistance part.Influence of the melamine foaming acoustic board to microperforated panel in itself is mainly reflected in the end of perforation
End amendment aspect, the structure of perforated plate is close to for sound-absorbing material, and the increased acoustic reactance in end will change, while also increasing by one
Acoustic resistance.Proved according to theoretical and experimental analysis, melamine foaming acoustic board is disposed in cavity, can be empty in same structure
Between under be obviously improved the sound absorbing capabilities of micropunch resonance sound-absorbing structure.
Shown by the comparative analysis to evaluation amounts such as absorptivity, acoustic absorptivity peak value and acoustic absorptivity bandwidth, in cavity
Inside filling up melamine foaming acoustic board has optimal acoustically effective, but corresponding engineering cost is also maximum.Correspondence is certain thick
The structure acoustically effective that the melamine foaming acoustic board of degree is placed in the middle part of metal framework structure cavity is best, is placed on micropunch
Effect is more or less the same before back and tack sound-insulating felt.
The beneficial effects of the utility model are：The absorption band of microperforated panel is widened, is absorbed sound with double-deck microperforated panel and tied
The acoustically effective of structure, is effectively reduced setup cost；Meanwhile, widen and use scope, improve weatherability.
Brief description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 is the side insight structural map of the utility model first embodiment.
Fig. 2 is the sectional view of second embodiment.
Fig. 3 is the sectional view of 3rd embodiment.
1. microperforated panel in figure, 2. metal framework structure, 3. weatherability acoustic board, 4. metal finishing sound insulationg board.
Specific embodiment
In the first embodiment shown in Fig. 1, a kind of outdoor composite sound absorbing module, by microperforated panel（1）, metal framework knot
Structure（2）, weatherability acoustic board（3）, metal finishing sound insulationg board（4）Composition, described metal finishing sound insulationg board（4）Four side knuckles,
Metal finishing sound insulationg board（4）Installed in metal framework structure（2）The back side, weatherability acoustic board（3）Installed in metal framework structure
（2）It is interior, microperforated panel（1）Installed in metal framework structure（2）Front, described metal framework structure（2）Thickness be 80~
150mm。
Described weatherability acoustic board（3）It is melamine acoustical foam board that unit weight is 9~12kg/m3.Described is micro-
Perforated plate（1）Tie-plate thickness be the galvanized steel plain sheet of 0.5~0.8mm, punching aperture be 0.8mm, punching rate be 1.5~4%.Described
Metal finishing sound insulationg board（4）Four side knuckles be fastened on metal framework structure（2）Side.Weatherability acoustic board（3）Gold is installed by system
Category frame structure（2）Middle part.
Weatherability acoustic board in a second embodiment shown in figure 2（3）System is arranged on microperforated panel（1）The back side.
The weatherability acoustic board in the 3rd embodiment shown in Fig. 3（3）System is arranged on metal finishing sound insulationg board（4）The back side.
It should be appreciated that not departing from the range of the utility model, various changes can be made to above-described embodiment.It is all
Any modification, equivalent and improvement made within spirit of the present utility model and principle etc., should be included in this practicality new
Within the protection domain of type.
Claims (5)
1. a kind of outdoor composite sound absorbing module, is insulated against sound by microperforated panel, metal framework structure, weatherability acoustic board, metal finishing
Plate is constituted, it is characterized in that：The described side knuckle of metal finishing sound insulationg board four, metal finishing sound insulationg board is installed in metal framework structure
The back side, weatherability acoustic board is arranged in metal framework structure, and microperforated panel is arranged on metal framework structure front, described gold
Category frame structure thickness is 80~150mm.
2. outdoor composite sound absorbing module according to claim 1, it is characterized in that：Described weatherability acoustic board system unit weight is
The melamine acoustical foam board of 9~12kg/ m3.
3. outdoor composite sound absorbing module according to claim 1, it is characterized in that：Described microperforated panel tie-plate thickness is 0.5
The galvanized steel plain sheet of~0.8mm, punching aperture are 0.8mm, and punching rate is 1.5~4%.
4. outdoor composite sound absorbing module according to claim 1, it is characterized in that：Four sides of described metal finishing sound insulationg board
Knuckle is fastened on metal framework structure side.
5. outdoor composite sound absorbing module according to claim 1, it is characterized in that：Gold is installed by described weatherability acoustic board system
Category frame structure middle part, the microperforated panel back side or metal finishing sound insulation back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621373341.4U CN206289549U (en) | 2016-12-15 | 2016-12-15 | Outdoor composite sound absorbing module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621373341.4U CN206289549U (en) | 2016-12-15 | 2016-12-15 | Outdoor composite sound absorbing module |
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| Publication Number | Publication Date |
|---|---|
| CN206289549U true CN206289549U (en) | 2017-06-30 |
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ID=59104631
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621373341.4U Active CN206289549U (en) | 2016-12-15 | 2016-12-15 | Outdoor composite sound absorbing module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108221722A (en) * | 2016-12-15 | 2018-06-29 | 厦门嘉达声学技术有限公司 | Outdoor composite sound absorbing module |
| CN111199722A (en) * | 2020-01-14 | 2020-05-26 | 南京航空航天大学 | Multilayer composite sound absorption structure |
-
2016
- 2016-12-15 CN CN201621373341.4U patent/CN206289549U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108221722A (en) * | 2016-12-15 | 2018-06-29 | 厦门嘉达声学技术有限公司 | Outdoor composite sound absorbing module |
| CN111199722A (en) * | 2020-01-14 | 2020-05-26 | 南京航空航天大学 | Multilayer composite sound absorption structure |
| CN111199722B (en) * | 2020-01-14 | 2023-12-01 | 南京航空航天大学 | Multilayer composite sound absorption structure |
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