CN208486395U - A kind of compound wedge absorber - Google Patents
A kind of compound wedge absorber Download PDFInfo
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- CN208486395U CN208486395U CN201820515572.7U CN201820515572U CN208486395U CN 208486395 U CN208486395 U CN 208486395U CN 201820515572 U CN201820515572 U CN 201820515572U CN 208486395 U CN208486395 U CN 208486395U
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- wedge absorber
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Abstract
The utility model discloses a kind of compound wedge absorber, the wedge main body (1) including multiple horizontally-parallel settings, each wedge main body (10) includes a base portion (1)；The front end of each base portion (1) has a tip (2)；The rear end of the adjacent base portion (1) of any two is connected；The interior of shell of each wedge main body (10) is filled with sound-absorbing material；At least one piece sound absorption cotton plate (3) is provided on the wedge absorber.A kind of compound wedge absorber disclosed by the utility model, it can allow metal wedge absorber not only to have preferable assimilation effect to low-frequency sound wave, and it can be improved absorbent properties to high frequency sound wave, effectively solve the problems, such as that there are high frequency sound waves to be easy reflection on metal wedge absorber, improve the whole sound absorption effect of wedge absorber, be conducive to widely promote and apply, be of great practical significance.
Description
Technical field
The utility model relates to acoustics noise reduction technical fields, more particularly to a kind of compound wedge absorber.
Background technique
Wedge absorber is a kind of special sound absorption structure for anechoic room, and structure can be generally divided into tip and base portion two
Part.Wedge absorber has the structure being gradually increased from the top to the bottom, thus while meeting larger absorption area, it is also real
Showed with the matched well of air impedance (i.e. gradually transition principle), to meet effective absorption to low-frequency sound wave.
In general, when sound-absorbing material appears in sound wave crest location (i.e. quarter-wave position), it will
There is maximum absorptivity (>=0.99%).The acoustic characteristic of wedge absorber often indicates with sound pressure reflection coefficient, sound pressure reflection system
Low-limit frequency, referred to as cutoff frequency corresponding to (then acoustic absorptivity >=0.99) when number≤0.1.
It should be noted that the sound absorption characteristics of wedge sound absorption depend primarily on the length and shape of wedge, wedge length is determined
Cutoff frequency is determined, usual wedge length is not less than the quarter-wave of corresponding cutoff frequency；The tip of wedge is longer, wedge
Low frequency absorption performance it is better；The base portion of wedge mainly plays very big influence to the absorption of low frequency (being less than 200Hz), to high-frequency absorption
Then very little；Wedge also usually there are cavity, is equivalent to the length for increasing wedge, can adjust resonant frequency, improve to low frequency behind
The absorption characteristic of sound wave, the general cavity take the 5%~25% of wedge total length.Therefore, current metal wedge absorber, it is right
The absorbent properties of low-frequency sound wave are good, and poor to the sound absorption effect of high frequency sound wave, are easy forming reflection, serious shadow to high frequency sound wave
Whole sound absorption effect is rung.
Therefore, there is an urgent need to develop a kind of technologies out at present, and metal wedge absorber can be allowed not only to have to low-frequency sound wave
There is preferable assimilation effect, and can be improved the absorbent properties to high frequency sound wave, effectively solves to exist on metal wedge absorber
High frequency sound wave is easy the problem of reflection, improves the whole sound absorption effect of wedge absorber.
Utility model content
In view of this, metal sound absorption can be allowed sharp the purpose of the utility model is to provide a kind of compound wedge absorber
Splitting not only has preferable assimilation effect to low-frequency sound wave, but also can be improved the absorbent properties to high frequency sound wave, effectively solves
There are problems that high frequency sound wave is easy reflection on metal wedge absorber, improve the whole sound absorption effect of wedge absorber, is conducive to wide
It promotes and applies, is of great practical significance generally.
For this purpose, the utility model provides a kind of compound wedge absorber, the wedge master including multiple horizontally-parallel settings
Body, each wedge main body include a base portion；
The front end of each base portion has a tip；
The rear end of the adjacent base portion of any two is connected；
The interior of shell of each wedge main body is filled with sound-absorbing material；
At least one block sound absorption cotton plate is provided on the wedge absorber.
Wherein, the shell of each wedge main body is the zinc-plated perforated metal panel in surface.
Wherein, the punching rate of the perforated plate is equal to 40%.
Wherein, the front end of tip is flush configuration in each wedge main body.
Wherein, the sound-absorbing material is glass fibre.
Wherein, entrant sound sealing film is enclosed with outside the sound-absorbing material, the entrant sound sealing film is arranged in the wedge master
Between the shell and sound-absorbing material of body.
Wherein, the sound absorption cotton plate is using cotton plate made of melamine.
Wherein, every block of sound absorption cotton plate is longitudinally mounted in each wedge main body the front end of tip or every piece
The sound absorption cotton plate is longitudinally mounted in the interval in two wedge main bodys of arbitrary neighborhood between tip.
By the above technical solution provided by the utility model as it can be seen that compared with prior art, the utility model provides
A kind of compound wedge absorber can allow metal wedge absorber not only to have preferable assimilation effect to low-frequency sound wave, but also
It can be improved the absorbent properties to high frequency sound wave, effectively solve asking there are the easy reflection of high frequency sound wave on metal wedge absorber
Topic, improves the whole sound absorption effect of wedge absorber, is conducive to widely promote and apply, be of great practical significance.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the embodiment one of compound wedge absorber provided by the utility model；
Fig. 2 is a kind of structural schematic diagram of the embodiment two of compound wedge absorber provided by the utility model；
Fig. 3 is interactional curve synoptic diagram between the sound clear index and acoustics transmission performance of perforated metal panel；
In figure: 1 is base portion, and 2 be tip, and 3 be sound absorption cotton plate, and 10 be wedge main body.
Specific embodiment
In order to make those skilled in the art better understand the scheme of the utility model, with reference to the accompanying drawing and embodiment
The utility model is described in further detail.
Referring to Fig. 1 to Fig. 3, the utility model provides a kind of compound wedge absorber, including multiple horizontally-parallel settings
Wedge main body 1 (being not limited to Fig. 1, two shown in Fig. 2), each wedge main body 10 include a base portion 1；
The front end of each base portion 1 has a tip 2；
The rear end of the adjacent base portion 1 of any two is connected；
At least one block sound absorption cotton plate 3 is provided on the wedge absorber.
In the present invention, in specific implementation, the shell of each wedge main body 10 be using metal material (such as
Aluminium) made of perforated plate, such as can be the perforated metal panel zinc-plated with a thickness of the surface of 0.8mm.
It should be noted that, if the punching rate of its perforated metal panel used is excessive, being influenced for metal wedge absorber
Wedge structure intensity；If punching rate is too small, wedge acoustical behavior is influenced.Therefore it needs while proof strength, to the greatest extent may be used
Punching rate can be increased.In addition, according to the research achievement of industrial punched-plate association, using sound clear index (Transparency
Index, TI) as metal wedge absorber shell significant design index.Fig. 3 is acoustics of the sound clear index to wedge absorber
The influence of transmission performance.
In specific implementation, the punching rate of the perforated plate is equal to 40%, and the perforated plate preferably has sound transparent
Index is greater than 2600 pass.
In the present invention, in specific implementation, the front end of tip 2 is flush configuration in each wedge main body 10.
Therefore, for the utility model, the entire length of wedge can be shortened, guarantee that acoustical behavior is excellent, production technology simplifies, product
Quality and reliability greatly improves.
In the present invention, in specific implementation, the corner of each wedge main body 10 is to be welded to connect.
In the present invention, in specific implementation, the interior of shell of each wedge main body 10 is filled with sound-absorbing material,
The sound-absorbing material is preferably glass fibre, such as can be the glass fibre manufactured using long fibre moulding process, such as U.S.
The super glass wool of OWENS CORNING company production.
In the present invention, in specific implementation, entrant sound sealing is enclosed with outside the sound-absorbing material (such as glass fibre)
Film, the entrant sound seal film as armour layer, are arranged between the shell (i.e. perforated plate) of wedge main body 10 and sound-absorbing material, can use
In preventing completely short grained substance (i.e. internal glass fibre) leakage and to make this practical without influencing its acoustical behavior
The compound wedge absorber of novel offer can reach the air quality standard of national requirements.Simultaneously as entrant sound sealing film is deposited
, even if the shell exterior of the wedge main body 10 has the air-flow of high speed, the sound-absorbing material of inside filling will not be escaped, thus
Guarantee that the acoustical behavior of wedge is stablized.
In the present invention, in specific implementation, the sound absorption cotton plate 3 is preferably using cotton plate made of melamine.
In specific implementation, every block of sound absorption cotton plate 3 is longitudinally mounted in each wedge main body 10 before tip 2
End or every block of sound absorption cotton plate 3 are longitudinally mounted to the interval in two wedge main bodys 10 of arbitrary neighborhood between tip 2
In.
It therefore, can be by the way that sound absorption cotton plate made of melamine be pacified in different ways for the utility model
It is attached on metal wedge absorber, can be improved the absorbent properties to high frequency sound wave, effectively solve the presence of height on metal wedge absorber
Frequency sound wave is easy the problem of reflection (problem is caused by the factor that sound clear index includes), improves the whole sound absorption of wedge absorber
Effect can also extend the wideband application range of wedge absorber.
It should be noted that the unified conversion of the factors such as the thickness of wedge absorber, punching rate and aperture is the transparent prime number of sound,
Have between sound clear index and acoustical behavior and directly contacts.
For the utility model, by taking cutoff frequency is the metal wedge absorber of 100Hz as an example, using made of melamine
Cotton plate optimizes acoustic absorptivity.Obviously, the following method can also be applied on the metal wedge of different cutoff frequencies.Specifically
Are as follows:
The melamine cotton plate of predetermined width is mounted on the tip tack of wedge main body by embodiment one as shown in Figure 1
On, the acoustic absorptivity that wedge main body has at this time is as shown in table 1 below.Due to melamine cotton have in 6300Hz or more high frequency it is excellent
Sound absorbing performance, in conjunction with Fig. 3 it is found that sound reflecting of the perforated plate shell in high frequency treatment of metal can be reduced in this way.From the figure 3, it may be seen that
The sound clear index of perforated plate is bigger, then the decaying after acoustic wave transmission perforated plate is smaller, i.e. the reflection of sound wave is also fewer.
In addition, the melamine cotton plate of predetermined width, is mounted on two adjacent wedges by embodiment two as shown in Figure 2
Between the tip of main body, the acoustic absorptivity that wedge main body has at this time is as shown in table 1.
It should be noted that in the art, for testing broadband sound, the interface acoustic absorptivity of anechoic room is not
It, can be in complete indoor free found field of the acquisition error less than 1 decibel (dB), for provided by the utility model multiple when less than 0.83
Mould assembly wedge absorber, applicable lower frequency limit are 50Hz, can also be used for the narrowband sound not less than 63Hz in a certain range
Or the sound absorption test of single-frequency sound, therefore, it can significantly shorten the entire length of wedge absorber, can also effectively shorten and sound absorption is installed
Construction period, saving economic cost of the anechoic room of wedge etc..
Table 1 is that existing unicuspid is split, the compound wedge absorber of the utility model embodiment one and embodiment two passes through standing wave
The sound absorption parameter testing result schematic table that tube method measurement obtains.Table 1:
It should be noted that as previously described it is found that for the utility model, the compound wedge absorber provided, wedge
10 shell of main body is perforated metal panel, and the corner of wedge main body 10 is mostly to be welded to connect, rugged construction, securely, and due to outer
Surface is fully wrapped around by metal, and surface anticollision, protecting against shock are functional.The utility model is by by wedge absorber and melamine
Amine cotton knot altogether, has the characteristics that fire prevention, environmental protection, secured, shock resistance, beauty, the service life is long, acoustical behavior is excellent, Ke Yifang
Just, the application range of wedge absorber is flexibly widened.
For the utility model, in 10 interior of shell filling sucting sound material of wedge main body, while by the perforated plate of metal
The factors such as thickness, punching rate and the aperture of (i.e. 10 shell of wedge main body) calculate selection according to sound clear index, can make to inhale
Sound wedge fully meets the requirement that acoustic absorptivity reaches 0.99.
In conclusion compared with prior art, a kind of compound wedge absorber provided by the utility model can allow
Metal wedge absorber not only has preferable assimilation effect to low-frequency sound wave, but also can be improved the absorbability to high frequency sound wave
Can, it effectively solves the problems, such as that there are high frequency sound waves to be easy reflection on metal wedge absorber, improves the whole sound absorption effect of wedge absorber
Fruit is conducive to widely promote and apply, be of great practical significance.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the protection scope of the utility model.
Claims (8)
1. a kind of compound wedge absorber, which is characterized in that the wedge main body (10) including multiple horizontally-parallel settings, Mei Gesuo
Stating wedge main body (10) includes a base portion (1)；
The front end of each base portion (1) has a tip (2)；
The rear end of the adjacent base portion (1) of any two is connected；
The interior of shell of each wedge main body (10) is filled with sound-absorbing material；
At least one piece sound absorption cotton plate (3) is provided on the wedge absorber.
2. compound wedge absorber as described in claim 1, which is characterized in that the shell of each wedge main body (10) is equal
For the perforated metal panel that surface is zinc-plated.
3. compound wedge absorber as claimed in claim 2, which is characterized in that the punching rate of the perforated plate is equal to 40%.
4. compound wedge absorber as described in claim 1, which is characterized in that tip in each wedge main body (10)
(2) front end is flush configuration.
5. compound wedge absorber as described in claim 1, which is characterized in that the sound-absorbing material is glass fibre.
6. compound wedge absorber as described in claim 1, which is characterized in that it is close to be enclosed with entrant sound outside the sound-absorbing material
Sealer, the entrant sound sealing film are arranged between the shell and sound-absorbing material of the wedge main body (10).
7. compound wedge absorber as described in claim 1, which is characterized in that the sound absorption cotton plate (3) is using melamine
Cotton plate made of amine.
8. the compound wedge absorber as described in any one of claims 1 to 7, which is characterized in that every block of sound absorption cotton plate
(3) it is longitudinal that the front end of tip (2) or every piece of sound absorption cotton plate (3) in each wedge main body (10) are longitudinally mounted to
It is mounted in the interval in two wedge main bodys (10) of arbitrary neighborhood between tip (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820515572.7U CN208486395U (en) | 2018-04-12 | 2018-04-12 | A kind of compound wedge absorber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820515572.7U CN208486395U (en) | 2018-04-12 | 2018-04-12 | A kind of compound wedge absorber |
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| CN208486395U true CN208486395U (en) | 2019-02-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108487487A (en) * | 2018-04-12 | 2018-09-04 | 天津航天瑞莱科技有限公司 | A kind of compound wedge absorber |
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2018
- 2018-04-12 CN CN201820515572.7U patent/CN208486395U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108487487A (en) * | 2018-04-12 | 2018-09-04 | 天津航天瑞莱科技有限公司 | A kind of compound wedge absorber |
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