CN104929256B - Sound-absorption wall and sound-absorption advertising wall - Google Patents
Sound-absorption wall and sound-absorption advertising wall Download PDFInfo
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- CN104929256B CN104929256B CN201510392006.2A CN201510392006A CN104929256B CN 104929256 B CN104929256 B CN 104929256B CN 201510392006 A CN201510392006 A CN 201510392006A CN 104929256 B CN104929256 B CN 104929256B
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- sound
- absorbing
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- absorption
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Abstract
The invention discloses a sound-absorption wall and a sound-absorption advertising wall. The sound-absorption wall comprises a sound-absorption module, wherein the sound-absorption module is fixed to a basic wall body through a plurality of length-adjustable leveling members, and the sound-absorption module and the basic wall body define a thickness-adjustable sound-absorption cavity. The sound-absorption advertising wall comprises the sound-absorption module and an advertising module, wherein the advertising module comprises light-emitting bodies, a power line and a light-transmitting sound-absorption veneer. The light-emitting bodies are located in light-emitting grooves, a light reflecting plate is arranged on the inner wall forming the light-emitting grooves, and the power line is embedded into the sound-absorption module. The sound-absorption wall has the advantages that the flatness requirement for the basic wall body is reduced during installation, construction is facilitated, the cavity located between the sound-absorption module and the basic wall body is the thickness-adjustable sound-absorption cavity, the thickness of the sound-absorption cavity is adjusted and acoustical materials different in performance are filled according to the actual sound-absorption demand. An advertising function is achieved while sound absorption.
Description
Technical field
The present invention relates to technical field of buildings, and in particular to a kind of sound-absorbing wall and sound-absorbing advertising wall.
Background technology
With China's Building technology develop rapidly with people to acoustics in space and decorative effect requirement increasingly
Improve, a large amount of sound-absorbing materials and various sound-absorbings with different fabrication and installation structures and mode with different sound absorption qualities
Plate has obtained increasing application, wherein the cloth art Soft Roll being made using porous sound absorbing plate core external application entrant sound cloth process
Into main use object.It is well known that a perfect interior space acoustic efficiency needs have one in different frequencies
The individual suitable reverberation time, and the sound-absorbing effect of porous material can decline with the reduction of frequency, cause most space
All exist that low-frequency sound-absorbing amount is not enough and the acoustical flaw such as high frequency sound-absorbing is excessive.This is accomplished by taking difference according to Principles of Acoustics
Material, the vibration thin plate for such as specially absorbing low frequency acoustic energy adjust indoor tone quality with the material for possessing diffusion high-frequency sound energy, and
Traditional material does not adapt to the requirement completely due to its material characteristic and mounting means.Meanwhile, same sound-absorbing material can be with
The cavity thickness of the abatvoix behind is different and change, cavity is bigger, and sound-absorbing effect is better.And for installing the base of abatvoix
Plinth metope can be uneven, in order to ensure the flatness of sound-absorbing surface layer, increases the acoustic absorptivity of abatvoix, it is necessary in basic metope
Outside, remake one layer and basic metope have the lightgage steel joist of certain distance to ensure the rear sound-absorbing cavity of sound-absorbing surface layer,
The plasterboard or plywood that one layer of tiling simultaneously has maximum puncture rate comes levelling as substrate, so as to need to expend substantial amounts of people
Power material resources, and increased body of wall heavy burden.In addition to above weak point, many tradition sound-absorbing materials are all taken and are set according to designer
The dimensional requirement at meter scheme and scene makes finished product abatvoix and carrys out in-site installation, and this mode maximum drawback is that refinement is wanted in making
Degree is high, and the abatvoix of installation can not freely be exchanged again, unpicks and washes and be reclaimed.Once the surface cloth art of abatvoix is due to ash
The relation of dirt or time is dirty old or fades, and the abatvoix metope just all can only be re-replaced, and not only increased the maintenance of owner
Cost, and the cloth art abatvoix under changeing can all destroy, and define secondary building waste.The good news is, Patent No.
2011205496414 applicable new solves the problems such as environmental protection and construction complicated, while tearing open for surface fabric can also be passed through
Change and clean to reach reusable purpose, but can not equally solve the leveling and the installation of rear sound-absorbing cavity of basic metope and need
Want substantial amounts of material cost and operating expenses.Importantly, each part of commercial space, in the cinema screening Room
Surrounding sound-absorbent wall, is all the precious resources of Enterprise business image display and commercial advertisement issue.But due to traditional sound-absorbent wall
Material and mounting structure, limit the effectively utilizes to these spaces, cause substantial amounts of social resources and waste.
The content of the invention
It is an object of the invention to provide a kind of sound-absorbing wall and sound-absorbing advertising wall, sound-absorbing component is by some adjustable in length
Levelling component is fixed on foundation wall, is fixed by levelling component so that reduce putting down foundation wall when the present invention is installed
Whole degree requires that be easy to construction, the space between sound-absorbing component and foundation wall is the adjustable sound-absorbing chamber of thickness, can basis
Actual sound-absorbing needs the thickness for adjusting sound-absorbing chamber, by the luminescence component for arranging, realizes lighting, by the cloth to luminous body
Put so that luminous body is combined into the form that word, pattern even color etc. possesses advertisement implication, the light that luminescence component sends is direct
Seen by eye, so as to realize advertising function, the light that luminous body sends can also be arranged on anterior transparent of luminous body or half
Transparent transparent fireproof sound-absorbing facing illuminates, and some light eventually enters into the eye of people through billboard, so that of the invention
Sound-absorbing billboard be provided simultaneously with sound-absorbing and advertising function, to overcome deficiencies of the prior art.
The purpose of the present invention is achieved through the following technical solutions：
Sound-absorbing wall, including sound-absorbing component, the sound-absorbing component are fixed on base by the levelling component of some adjustable in length
On plinth body of wall, the adjustable sound-absorbing chamber of thickness between the sound-absorbing component and foundation wall, is surrounded；
The sound-absorbing component includes the first card bone, the second card bone and the acoustics set gradually along the direction away from foundation wall
Body；
The acoustics body includes acoustic(al)absorbent and diffuser；
The sound-absorbing component also includes hypotenuse buckle, edge buckle, and, the acoustic(al)absorbent is deviated from into the one of foundation wall
Side is coated on interior fireproof acoustic facing；
Some the first draw-in grooves being clasped with the hypotenuse are provided with the middle part of the second card bone, the second card bone
Edge is provided with the second draw-in groove being clasped with the edge, and the fireproof acoustic facing passes through hypotenuse card with the second card bone
Buckle is connected in the first draw-in groove, edge buckle is connected in the second draw-in groove and fixes.
Further, the levelling component includes the screw bolt and nut being engaged, and one end of the bolt is anchored at basis
Body of wall, the other end of the bolt are combined with nut described at least two, the first card bone by the screw thread being disposed thereon
Some through holes coordinated with the bolt are provided with, the free end of the bolt passes through the through hole.
Further, the second card bone is provided with some opening back ofs the body with the first card bone clamping, the second card bone
From the sound-absorbing fluid chamber of foundation wall, the acoustic(al)absorbent is arranged on the acoustic(al)absorbent within the chamber.
Further, the first card bone is provided with some the 3rd draw-in grooves be arrangeding in parallel, institute away from the side of foundation wall
State the second card bone and be provided with some raised with the 3rd draw-in groove coordinates card bone near the side of foundation wall.
Sound-absorbing advertising wall, including sound-absorbing component and advertisement component, wherein：
The sound-absorbing component is fixed on foundation wall by the levelling component of some adjustable in length, the sound-absorbing component
The adjustable sound-absorbing chamber of thickness is surrounded between foundation wall；
The sound-absorbing component include along away from foundation wall direction set gradually the first card bone, the second card bone, sound-absorbing
Body, hypotenuse buckle, edge buckle, and, the acoustic(al)absorbent is coated on into interior fireproof acoustic decorations away from the side of foundation wall
Face；
Some the first draw-in grooves being clasped with the hypotenuse are provided with the middle part of the second card bone, the second card bone
Edge is provided with the second draw-in groove being clasped with the edge, and the fireproof acoustic facing passes through hypotenuse card with the second card bone
Buckle is connected in the first draw-in groove, edge buckle is connected in the second draw-in groove and fixes；
The advertisement component includes luminous body and power line, and the luminous body is electrically connected with power supply by the power line
Connect, between the second card bone, be provided with luminous groove of some openings away from foundation wall, the luminous body is located at the luminous groove
Interior, the inwall for forming the luminous groove is provided with reflector, and the power line is embedded in the sound-absorbing component；
The metallic channel passed through for the power line is provided with first draw-in groove, the second card bone is arranged in a crossed manner, and
The metallic channel insertion being arranged on all second card bones, the end of the second card bone be provided with penetrate for the power line,
The through wires hole for passing.
Preferably, the fireproof acoustic facing at the opening of the luminous groove is replaced with by made by transparent or semitransparent material
Printing opacity sound-absorbing facing, the printing opacity sound-absorbing facing are fixed with light guide plate towards the one side of the luminous groove.
Beneficial effects of the present invention are：
Sound-absorbing component is fixed on foundation wall by the levelling component of some adjustable in length, solid by levelling component
It is fixed so that the flatness requirement to foundation wall to be reduced when the present invention is installed, is easy to construction, positioned at sound-absorbing component and foundation wall
Between space be the adjustable sound-absorbing chamber of thickness, can need to adjust the thickness of sound-absorbing chamber according to actual sound-absorbing, by setting
The luminescence component put, realizes lighting, by the arrangement to luminous body so that luminous body is combined into word, pattern even color etc.
Possesses the form of advertisement implication, the light that luminescence component sends directly is seen by eye that, so as to realize advertising function, luminous body sends
Light can also be arranged on the anterior transparent or semitransparent billboard of luminous body and illuminate, some light is final through billboard
Into the eye of people, so that the sound-absorbing billboard of the present invention is provided simultaneously with sound-absorbing and advertising function；Second card bone and first
It is by connecting and fixing between card bone, by connecting and fixing between fireproof acoustic facing and the second card bone, easy for installation, improve and apply
Work efficiency rate；Reflector is set in luminous groove, the light that further raising luminous body sends is set along the direction cover away from foundation wall,
Cause sound-absorbing advertising wall more eye-catching in the case that light intensity is constant；Attract to set between facing and luminous groove in printing opacity
Put light guide plate, when luminous body is arranged on the diapire of luminous groove, light guide plate can by vertical irradiation to light transverse scattering thereon,
To improve the resolution of the sight line to people, the present invention is improved as the effect of advertising of sound-absorbing advertising wall.
Description of the drawings
Fig. 1 is the structural representation of the transverse section of sound-absorbing wall of the present invention；
Fig. 2 is the structural representation of sound-absorbing advertising wall of the present invention；
Fig. 3 is a kind of dimensional structure diagram of second card bone of the present invention；
Fig. 4 is the dimensional structure diagram of another second card bone of the present invention；
Fig. 5 is the dimensional structure diagram of another second card bone of the present invention；
Fig. 6 is the dimensional structure diagram of another second card bone of the present invention；
Fig. 7 is the dimensional structure diagram of another second card bone of the present invention；
Fig. 8 is the dimensional structure diagram of the threeway for connecting its crossover sites when the second card bone of the invention is arranged in a crossed manner；
Fig. 9 is the dimensional structure diagram of the four-way for connecting its crossover sites when the second card bone of the invention is arranged in a crossed manner.
In figure：100th, foundation wall；200th, levelling component；301st, the first card bone；3011st, the 3rd draw-in groove；302nd, the second card
Bone；3021st, the first draw-in groove；3022nd, the second draw-in groove；3023rd, card bone is raised；3024th, light groove；3025th, metallic channel；303rd, acoustics
Body；304th, fireproof acoustic facing；4011st, luminous body；4012nd, reflector；4013rd, printing opacity sound-absorbing facing；4014th, light guide plate；
500th, sound-absorbing chamber.
Specific embodiment
Preferred implementation
Sound-absorbing wall, as shown in figure 1, which includes sound-absorbing component, levelling component of the sound-absorbing component by some adjustable in length
200 are fixed on foundation wall 100, and the adjustable sound-absorbing chamber of thickness 500 is surrounded between sound-absorbing component and foundation wall 100.Inhale
Sound component is fixed on foundation wall 100 by the levelling component 200 of some adjustable in length, is fixed by levelling component 200,
So that the flatness requirement to foundation wall 100 is reduced when the present invention is installed, it is easy to construction, positioned at sound-absorbing component and foundation wall
Space between 100 is the adjustable sound-absorbing chamber 500 of thickness, can need to adjust the thickness of sound-absorbing chamber 500 according to actual sound-absorbing
Degree.
Above-mentioned sound-absorbing component includes the first card bone 301, the second card bone set gradually along the direction away from foundation wall 100
302 and acoustics body 303.First card bone 301 and the second card bone 302 are made up of rustless steel and plastic-steel respectively, and the second card bone 302 is three-dimensional
Structure is as shown in Fig. 3-Fig. 7.Preferably, the acoustics body 303 includes acoustic(al)absorbent and diffuser.The acoustic(al)absorbent includes absorbing medium-high frequency
The acoustical cotton of sound, the sound-absorbing thin plate for absorbing low-frequency sound, the diffuser is using metallic plate, cement plate made by rigid material
Or the hard plate such as hardwood plate.
One end of above-mentioned levelling component 200 is fixed with foundation wall 100, and the other end is to away from the direction of foundation wall 100
Extend, the sound-absorbing component installed with the end is held up into fixation upwards, and sound-absorbing component is arranged on the position on levelling component 200
Adjustable setting is put, for adjusting the thickness of sound-absorbing chamber 500, as a kind of embodiment of the levelling component 200：Its bag
The screw bolt and nut being engaged is included, one end of bolt is anchored at foundation wall 100, and the other end of bolt passes through what is be disposed thereon
Screw thread is combined with least two nuts, by the through hole that bolt may pass through and nut not may pass through is opened up on sound-absorbing component, will
The wall for forming the through hole is clipped between two nuts, is then screwed two nuts in the opposite direction, makes to form the wall quilt of the through hole
It is clamped between two nuts, so as to sound-absorbing component is fixed.By the setting of levelling component 200, when body of wall out-of-flatness or sound-absorbing
The through hole of component by adjusting respectively by the installation site with levelling component 200, reduces base not in same level
The flatness requirement of the through hole on the flatness requirement and sound-absorbing component of plinth body of wall 100, reduces through hole on sound-absorbing component
Machining accuracy, it is easy to position, mount and dismount, improve working performance.
In order to further improve the present invention installation, removal efficiency, by the second card bone 302 and the first card bone 301 it
Between be arranged to the form of clamping, the second card bone 302 is provided with sound-absorbing fluid chamber of some openings away from foundation wall 100, sound-absorbing
Body is arranged on acoustic(al)absorbent within the chamber, and acoustic(al)absorbent is arranged on the form of acoustic(al)absorbent within the chamber can be for bonding, setting-in or by connection
Part is fixed.
Sound-absorbing component also includes hypotenuse buckle, edge buckle, and, acoustic(al)absorbent is wrapped away from the side of foundation wall 100
Fireproof acoustic facing 304 in overlaying on, the fireproof acoustic facing 304 are made up of fire-retardant sound-absorbing material, such as fireproof acoustic cloth；Second
The middle part of card bone 302 is provided with some the first draw-in grooves 3021 being clasped with hypotenuse, and the edge of the second card bone is provided with and edge card
The second draw-in groove 3022 that snap fit is closed, fireproof acoustic facing 304 and the second card bone 302 are connected to the first draw-in groove by hypotenuse buckle
3021 is interior, edge buckle is connected in the second draw-in groove 3022 and fixes.
In the same manner, in order to improve the convenience dismounted between the second card bone 302 and the first card bone 301, the second card bone 302 and
Clamping form between one card bone 301 is as follows：First card bone 301 is provided with some be arrangeding in parallel away from the side of foundation wall 100
The 3rd draw-in groove 3011, the second card bone 302 is provided with some cards coordinated with the 3rd draw-in groove 3011 near the side of foundation wall 100
Bone projection 3023, is fixed in the 3rd draw-in groove 3011 by the card bone raised 3023 being arranged on the second card bone 302, the second card bone
302 are fixed with the first card bone 301.
Sound-absorbing advertising wall, as shown in Fig. 2 which includes sound-absorbing component and advertisement component, wherein：
Sound-absorbing component is fixed on foundation wall 100 by the levelling component 200 of some adjustable in length, sound-absorbing component with
The adjustable sound-absorbing chamber of thickness 500 is surrounded between foundation wall 100；Advertisement component includes luminous body 4011 and power line, lights
Body 4011 is electrically connected with the power supply by power line, and the second card bone 302 is provided with luminous groove of some openings away from foundation wall 100
3024, luminous body 4011 is located in luminous groove 3024, and the inwall for forming luminous groove 3024 is provided with reflector 4012, and power line is embedding
It is located in sound-absorbing component.By the luminescence component for arranging, realize lighting, by being combined into word, pattern very to luminous body 4011
Possess the form of advertisement implication to color etc., the light that luminescence component sends directly is seen by eye, so as to realize advertising function, send out
The transparent or semitransparent billboard 4013 for being arranged on 4011 front portion of luminous body can also be illuminated by the light that body of light 4011 sends, portion
Light splitter eventually enters into the eye of people through billboard 4013, so that the sound-absorbing billboard 4013 of the present invention is provided simultaneously with inhaling
Sound and advertising function.Reflector 4012 is set in luminous groove 3024, the light edge that further raising luminous body 4011 sends deviates from
The direction cover of foundation wall 100 sets, and causes sound-absorbing advertising wall more eye-catching in the case that 4011 luminous intensity of luminous body is constant.
With the structure of sound-absorbing wall, the sound-absorbing component equally includes the set gradually along the direction away from foundation wall 100
One card bone 301, the second card bone 302, acoustic(al)absorbent, hypotenuse buckle, edge buckle, and, by acoustic(al)absorbent away from foundation wall 100
Side is coated on interior fireproof acoustic facing 304；The middle part of the second card bone 302 is provided with some the first cards being clasped with hypotenuse
Groove 3021, the edge of the second card bone are provided with the second draw-in groove 3022 being clasped with edge, fireproof acoustic facing 304 and the second card
Bone 302 is connected in the first draw-in groove 3021 by hypotenuse buckle, edge buckle is connected in the second draw-in groove 3022 and fixes；First card
The metallic channel 3025 that power supply source line passes through is provided with groove 3021, the second card bone 302 is arranged in a crossed manner, and is arranged on all second cards
3025 insertion of metallic channel on bone 302, the end of the second card bone 302 is provided with the through wires hole that power supply source line is penetrated, passed.Second card
When bone 302 is three arranged in a crossed manner, its end is attached by the threeway shown in Fig. 8, and the second card bone 302 is set for four intersections
When putting, its end is attached by the four-way shown in Fig. 9, will be arranged on the second different card bones by the setting of Fig. 8-Fig. 9
3025 insertion of metallic channel on 302, is beneficial to the setting of power line, is easy to construction.
In order to ensure to attract the effect of advertising of advertising wall, the fire prevention at the opening of luminous groove 3024 to attract facing 304 to replace
It is the printing opacity sound-absorbing facing 4013 by made by transparent or semitransparent material, the printing opacity sound-absorbing facing 4013 is by transparent or semitransparent
Plate, film or cloth are made, and printing opacity sound-absorbing facing 4013 is fixed with light guide plate 4014 towards the one side of luminous groove 3024.When luminous body sets
Put in the diapire of luminous groove 3024, light guide plate 4014 can be by vertical irradiation to light transverse scattering thereon, to improve to people
Sight line resolution, improve the present invention as sound-absorbing advertising wall effect of advertising.
Claims (6)
1. sound-absorbing wall, it is characterised in that including sound-absorbing component, levelling component of the sound-absorbing component by some adjustable in length
It is fixed on foundation wall, between the sound-absorbing component and foundation wall, surrounds the adjustable sound-absorbing chamber of thickness；
The sound-absorbing component includes the first card bone, the second card bone and the acoustics body set gradually along the direction away from foundation wall；
The acoustics body includes acoustic(al)absorbent and diffuser；
The sound-absorbing component also includes hypotenuse buckle, edge buckle and the acoustic(al)absorbent is coated away from the side of foundation wall
In interior fireproof acoustic facing；
Some the first draw-in grooves being clasped with the hypotenuse, the edge of the second card bone are provided with the middle part of the second card bone
The second draw-in groove being clasped with the edge is provided with, the fireproof acoustic facing passes through hypotenuse buckle card with the second card bone
It is connected in the first draw-in groove, edge buckle is connected in the second draw-in groove and fixes.
2. sound-absorbing wall according to claim 1, it is characterised in that the levelling component includes bolt and the spiral shell being engaged
Mother, one end of the bolt are anchored at foundation wall, the other end of the bolt by the screw thread being disposed thereon be combined with to
Few two nuts, the first card bone are provided with some through holes coordinated with the bolt, and the free end of the bolt is worn
Cross the through hole.
3. sound-absorbing wall according to claim 2, it is characterised in that the second card bone and the first card bone clamping, institute
State the second card bone and be provided with sound-absorbing fluid chamber of some openings away from foundation wall, the acoustic(al)absorbent is arranged on the sound-absorbing body cavity
It is indoor.
4. the sound-absorbing wall according to claim 1 or 3, it is characterised in that the first card bone is away from the side of foundation wall
It is provided with some the 3rd draw-in grooves be arrangeding in parallel, the second card bone is provided with some with the 3rd card near the side of foundation wall
The card bone that groove coordinates is raised.
5. sound-absorbing advertising wall, it is characterised in that including sound-absorbing component and advertisement component, wherein：
The sound-absorbing component is fixed on foundation wall by the levelling component of some adjustable in length, the sound-absorbing component and base
The adjustable sound-absorbing chamber of thickness is surrounded between plinth body of wall；
The first card bone that the sound-absorbing component includes setting gradually along the direction away from foundation wall, the second card bone, acoustic(al)absorbent, tiltedly
Checkpost button, edge buckle and by the acoustic(al)absorbent away from foundation wall side be coated in fireproof acoustic facing；
Some the first draw-in grooves being clasped with the hypotenuse, the edge of the second card bone are provided with the middle part of the second card bone
The second draw-in groove being clasped with the edge is provided with, the fireproof acoustic facing is connected to the first draw-in groove by hypotenuse buckle
Interior, edge buckle is connected in the second draw-in groove fixed；
The advertisement component includes luminous body and power line, and the luminous body is electrically connected with the power supply by the power line, institute
The luminous groove that some openings are provided between the second card bone away from foundation wall is stated, the luminous body is located in the luminous groove, shape
Inwall into the luminous groove is provided with reflector, and the power line is embedded in the sound-absorbing component；
The metallic channel passed through for the power line is provided with first draw-in groove, the second card bone is arranged in a crossed manner, and arranges
Metallic channel insertion on all second card bones, the end of the second card bone is provided with and penetrates, passes for the power line
Through wires hole.
6. sound-absorbing advertising wall according to claim 5, it is characterised in that the fireproof acoustic decorations at the opening of the luminous groove
Face replaces with the printing opacity sound-absorbing facing by made by transparent or semitransparent material, and the printing opacity sound-absorbing facing is towards the luminous groove
Light guide plate is fixed with simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510392006.2A CN104929256B (en) | 2015-07-03 | 2015-07-03 | Sound-absorption wall and sound-absorption advertising wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510392006.2A CN104929256B (en) | 2015-07-03 | 2015-07-03 | Sound-absorption wall and sound-absorption advertising wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104929256A CN104929256A (en) | 2015-09-23 |
| CN104929256B true CN104929256B (en) | 2017-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510392006.2A Expired - Fee Related CN104929256B (en) | 2015-07-03 | 2015-07-03 | Sound-absorption wall and sound-absorption advertising wall |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839805B (en) * | 2016-05-26 | 2018-05-29 | 俞昌书 | A kind of sound-absorbing wall |
| CN108729576A (en) * | 2018-06-01 | 2018-11-02 | 俞昌书 | A kind of checkpost bone, middle card bone and its surface modifying systems |
| CN112393298B (en) * | 2020-11-25 | 2023-05-26 | 宜兴市泰宇汽车零部件有限公司 | Frame type range hood sound absorbing box based on modified composite sound absorbing cotton |
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|---|---|---|---|---|
| CN2644564Y (en) * | 2003-08-04 | 2004-09-29 | 中建一局建设发展公司 | Fixture for perforated aluminum sheet sound absorbing wall |
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| Publication number | Publication date |
|---|---|
| CN104929256A (en) | 2015-09-23 |
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