CN207160298U - A kind of double cosine sound absorbers - Google Patents
A kind of double cosine sound absorbers Download PDFInfo
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- CN207160298U CN207160298U CN201720400047.6U CN201720400047U CN207160298U CN 207160298 U CN207160298 U CN 207160298U CN 201720400047 U CN201720400047 U CN 201720400047U CN 207160298 U CN207160298 U CN 207160298U
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Abstract
The utility model belongs to noise reduction technology field, more particularly to a kind of double cosine sound absorbers.The utility model provides a kind of double cosine sound absorbers, including：Female groove, Micropunch Acoustic Board and sound absorption cotton；Female groove is a uncovered hollow cavity, and Micropunch Acoustic Board is arranged at the missing lid of cavity, and sound absorption cotton is arranged at the inner surface of Micropunch Acoustic Board.Through experimental tests can obtain, a kind of double cosine sound absorbers provided by the utility model, acoustic absorptivity by 125Hz to 1KHz all 0.8 or more than, in addition to strengthening the sound absorbing capabilities of low frequency, extra absorption can also be provided to the sound of intermediate frequency, this can optimize the acoustic environment of lecture hall and meeting room etc., improve the intelligibility of speech in room.A kind of double cosine sound absorbers provided by the utility model, solve in the prior art, be directed to the suspended absorber of low-frequency sound only can carry out absorption processing to low-frequency sound, can not provide extra absorption to the sound of intermediate frequency, application scenarios have limited technological deficiency.
Description
Technical field
The utility model belongs to noise reduction technology field, more particularly to a kind of double cosine sound absorbers.
Background technology
Suspended absorber is compared with the sound-absorbing material on chamber internal surface, and under same projected area, suspended absorber has
Higher sound absorption efficiency.This is due to that suspended absorber has bigger effective absorption area, includes the upper top of suspended absorber
Face, bottom surface and side；Further, since sound wave multiple reflections between upper top surface and the building top surface of sound absorber, so as to quilt
Repeatedly absorb, increase absorption, improve sound absorption efficiency.
The sound absorbing capabilities of suspended absorber are often represented with effective absorption of the single sound absorber of different frequency.Inhale in space
The sqouynd absorption lowering noise of sound body or reduce the reverberation time effect depend primarily on suspended absorber quantity, suspension spacing and material and
Structure, it is also relevant with the sound field conditions in space.As former chamber internal surface absorption is seldom, reflected sound is more, the reverberation time
Very long, then it is often 5~8 decibels to hang the noise reduction after suspended absorber, up to 10~12 decibels during highest；Such as former indoor table
Face absorption is larger, reverberation process unobvious, then need not hang suspended absorber.However, of the prior art be directed to low frequency
The suspended absorber of sound, can only absorption processing be carried out to low-frequency sound, can not provide extra absorption to the sound of intermediate frequency,
Application scenarios have limitation.
Therefore, a kind of double cosine sound absorbers are developed, the space for solving in the prior art, to be directed to low-frequency sound is inhaled
Sound body only can carry out absorption processing to low-frequency sound, can not provide extra absorption to the sound of intermediate frequency, application scenarios have
The technological deficiency of limitation, become those skilled in the art's urgent problem to be solved.
Utility model content
In view of this, the utility model provides a kind of double cosine sound absorbers, for solving in the prior art, to be directed to low
The suspended absorber of frequency sound only can carry out absorption processing to low-frequency sound, can not provide extra suction to the sound of intermediate frequency
Receive, application scenarios have limited technological deficiency.
The utility model provides a kind of double cosine sound absorbers, and double cosine sound absorbers include：Female groove, micropunch sound absorption
Plate and sound absorption cotton；
The female groove is a uncovered hollow cavity, and the Micropunch Acoustic Board is arranged at the missing lid of the cavity, institute
State the inner surface that sound absorption cotton is arranged at the Micropunch Acoustic Board.
Preferably, the length of the cavity is more than 200mm.
Preferably, the thickness of the Micropunch Acoustic Board is 0.6mm.
Preferably, the quantity two of the Micropunch Acoustic Board；
Two Micropunch Acoustic Boards are arranged in parallel, and the sound absorption cotton is arranged between the Micropunch Acoustic Board.
Preferably, the spacing of the Micropunch Acoustic Board is 100mm.
Preferably, the thickness of the sound absorption cotton is 25mm.
Preferably, the aperture of the Micropunch Acoustic Board is less than 1.0mm.
Preferably, the punching rate of the Micropunch Acoustic Board is less than 13%.
Preferably, the thickness of the female groove is 1.0mm.
Preferably, the sound absorption cotton is glass fibre cotton.
In summary, the utility model provides a kind of double cosine sound absorbers, and double cosine sound absorbers include：Female groove,
Micropunch Acoustic Board and sound absorption cotton；The female groove is a uncovered hollow cavity, and the Micropunch Acoustic Board is arranged at the cavity
Missing lid at, the sound absorption cotton is arranged at the inner surface of the Micropunch Acoustic Board.Through experimental tests can obtain, the utility model
There is provided a kind of double cosine sound absorbers, acoustic absorptivity by 125Hz to 1KHz all 0.8 or more than, except strengthen low frequency suction
Outside acoustic performance, additionally it is possible to extra absorption is provided to the sound of intermediate frequency, this can optimize the acoustic environment of lecture hall and meeting room etc.,
Improve the intelligibility of speech in room.A kind of double cosine sound absorbers provided by the utility model, solve in the prior art, are directed to
The suspended absorber of low-frequency sound only can carry out absorption processing to low-frequency sound, can not provide extra suction to the sound of intermediate frequency
Receive, application scenarios have limited technological deficiency.
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
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to the accompanying drawing of offer.
Fig. 1 is a kind of schematic cross-section for double cosine sound absorbers that the utility model embodiment provides；
Fig. 2 is a kind of unit sound absorber absorption area for double cosine sound absorbers that the utility model embodiment provides；
Wherein, in Fig. 1, female groove 1, Micropunch Acoustic Board 2 and sound absorption cotton 3.
Embodiment
The utility model embodiment provides a kind of double cosine sound absorbers, for solving in the prior art, to be directed to low frequency
The suspended absorber of sound only can carry out absorption processing to low-frequency sound, can not provide extra absorption to the sound of intermediate frequency,
Application scenarios have limited technological deficiency.
To enable the purpose of this utility model, feature and advantage more obvious and understandable, below in conjunction with this
Accompanying drawing in utility model embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, and shows
So, the embodiments described below are only the utility model part of the embodiment, and not all embodiment.Based on this practicality
Embodiment in new, all other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example is applied, belongs to the scope of the utility model protection.
Referring to Fig. 1, the utility model embodiment provides a kind of double cosine sound absorbers, double cosine sound absorbers include：It is female
Groove 1, Micropunch Acoustic Board 2 and sound absorption cotton 3；Female groove 1 is a uncovered hollow cavity, and Micropunch Acoustic Board 2 is arranged at lacking for cavity
Lose at lid, sound absorption cotton 3 is arranged at the inner surface of Micropunch Acoustic Board 2.In the technical scheme that the utility model embodiment provides, ring
Sound in border enters inside cavity by Micropunch Acoustic Board 2 so that after cavity produces resonance, sound is decayed；Meanwhile
After sound enters inside cavity by Micropunch Acoustic Board 2, by the friction with the cotton 3 that absorbs sound, energy exchange is produced, is added
For the treatment effect of intermediate frequency sound.Through experimental tests can obtain, and the utility model carries a kind of double cosine sound absorbers of embodiment confession,
Acoustic absorptivity by 125Hz to 1KHz all 0.8 or more than, except strengthen low frequency sound absorbing capabilities in addition to, additionally it is possible to intermediate frequency
Sound provides extra absorption, and this can optimize the acoustic environment of lecture hall and meeting room etc., improve the intelligibility of speech in room.This
A kind of double cosine sound absorbers that utility model embodiment provides, solves the space suction in the prior art, being directed to low-frequency sound
Sound body only can carry out absorption processing to low-frequency sound, can not provide extra absorption to the sound of intermediate frequency, application scenarios have
The technological deficiency of limitation.
On the basis of the good acoustically effective of double cosine sound absorbers is ensured, while take into account to reduce double cosine sound absorbers
Volume, further to reduce its weight, while being easily installed, do not affect the appearance.There is provided due to the utility model embodiment
A kind of double cosine sound absorbers, primarily to absorbing the sound of processing low-frequency range, because the wavelength of sound of low-frequency range is longer, therefore
Need the route decayed also relatively long in female groove 1, consider by testing and can be calculated, the utility model is implemented
In a kind of double cosine sound absorbers that example provides, the length of cavity is more than 200mm.
Further optimisation technique scheme, consider the good acoustically effective of Micropunch Acoustic Board 2 and mitigate double remaining
The angle of the weight of string sound absorber, both Micropunch Acoustic Board 2 can be passed through in order to sound, Micropunch Acoustic Board 2 can be passed through again
Absorb a part of sound.In the technical scheme that the utility model embodiment provides, the thickness of Micropunch Acoustic Board 2 is 0.6mm.
Effectively to ensure the good acoustically effective of Micropunch Acoustic Board 2, further optimize the sound absorption of double cosine sound absorbers
Effect, in a kind of double cosine sound absorbers that the utility model embodiment provides, the quantity of Micropunch Acoustic Board 2 two；Two
Micropunch Acoustic Board 2 is arranged in parallel, and sound absorption cotton 3 is arranged between Micropunch Acoustic Board 2.Sound micro- is worn passing sequentially through first piece
, still can be according to the principle of Helmholtz resonator and perforated plate resonator, to not yet after hole acoustic board 2 and sound absorption cotton 3
The low-frequency sound handled, increases strength disposal again, further the acoustically effective of the double cosine sound absorbers of optimization.
Further optimisation technique scheme, optimal sound absorption treatment effect is played to sound, and the utility model embodiment carries
In the technical scheme of confession, the spacing of Micropunch Acoustic Board 2 is 100mm.
To cause a kind of double cosine sound absorbers that the utility model embodiment provides that there is one relatively for intermediate frequency sound
Excellent absorption treatment effect, the utility model embodiment provide technical scheme in, sound absorption cotton 3 thickness be 25mm.
Drawn by determination of technical staff, the aperture of Micropunch Acoustic Board 2 and perforated area, without being bigger acoustically effective
Better, behind aperture and perforated area arrival a certain threshold value, acoustically effective is deteriorated, and is drawn through test of many times measure, to reach one
Individual relatively optimal acoustically effective, the utility model embodiment provide technical scheme in, the aperture of Micropunch Acoustic Board 2 is less than
1.0mm, the punching rate of Micropunch Acoustic Board 2 are less than 13%.
Further optimisation technique scheme, is easy to the installation of double cosine sound absorbers, while ensures that sound can be in cavity
Decayed after effectively resonance occurs, in the technical scheme that the utility model embodiment provides, the thickness of female groove 1 is 1.0mm.
On the basis of the good acoustically effective of cotton 3 that ensures to absorb sound, at the same take into account with reduce the cost of sound absorption cotton 3 with, inhale
Sound cotton 3 has good weatherability and sound absorption cotton 3 does not cause secondary pollution, and one kind that the utility model embodiment provides is double remaining
In string sound absorber, sound absorption cotton 3 is glass fibre cotton.
Double cosine sound absorbers are made according to the technical scheme of above-mentioned offer, determine the acoustics of prepared double cosine sound absorbers
Performance, gained acoustical behavior can further regard to Fig. 2.As can be drawn from Figure 2, the technical scheme that the utility model embodiment provides
Obtained double cosine sound absorbers, unit sound absorber absorption area acoustical behavior index is good, and corresponding data can be drawn from Fig. 2,
It will not be repeated here.
In summary, the utility model provides a kind of double cosine sound absorbers, and double cosine sound absorbers include：Female groove,
Micropunch Acoustic Board and sound absorption cotton；The female groove is a uncovered hollow cavity, and the Micropunch Acoustic Board is arranged at the cavity
Missing lid at, the sound absorption cotton is arranged at the inner surface of the Micropunch Acoustic Board.Through experimental tests can obtain, the utility model
There is provided a kind of double cosine sound absorbers, acoustic absorptivity by 125Hz to 1KHz all 0.8 or more than, except strengthen low frequency suction
Outside acoustic performance, additionally it is possible to extra absorption is provided to the sound of intermediate frequency, this can optimize the acoustic environment of lecture hall and meeting room etc.,
Improve the intelligibility of speech in room.A kind of double cosine sound absorbers provided by the utility model, solve in the prior art, are directed to
The suspended absorber of low-frequency sound only can carry out absorption processing to low-frequency sound, can not provide extra suction to the sound of intermediate frequency
Receive, application scenarios have limited technological deficiency.
A kind of double cosine sound absorbers provided by the utility model are described in detail above, for the one of this area
As technical staff, according to the utility model embodiment thought, have change in specific embodiments and applications
Place, in summary, this specification content should not be construed as to limitation of the present utility model.
Claims (10)
1. a kind of double cosine sound absorbers, it is characterised in that double cosine sound absorbers include：Female groove, Micropunch Acoustic Board and suction
Sound cotton；
The female groove is a uncovered hollow cavity, and the Micropunch Acoustic Board is arranged at the missing lid of the cavity, the suction
Sound cotton is arranged at the inner surface of the Micropunch Acoustic Board.
2. double cosine sound absorbers according to claim 1, it is characterised in that the length of the cavity is more than 200mm.
3. double cosine sound absorbers according to claim 1, it is characterised in that the thickness of the Micropunch Acoustic Board is
0.6mm。
4. double cosine sound absorbers according to claim 1, it is characterised in that the quantity two of the Micropunch Acoustic Board
It is individual；
Two Micropunch Acoustic Boards are arranged in parallel, and the sound absorption cotton is arranged between the Micropunch Acoustic Board.
5. double cosine sound absorbers according to claim 4, it is characterised in that the spacing of the Micropunch Acoustic Board is
100mm。
6. double cosine sound absorbers according to claim 4 or 5, it is characterised in that the thickness of the sound absorption cotton is 25mm.
7. double cosine sound absorbers according to claim 1, it is characterised in that the aperture of the Micropunch Acoustic Board is less than
1.0mm。
8. double cosine sound absorbers according to claim 1, it is characterised in that the punching rate of the Micropunch Acoustic Board is less than
13%.
9. double cosine sound absorbers according to claim 1, it is characterised in that the thickness of the female groove is 1.0mm.
10. double cosine sound absorbers according to claim 1, it is characterised in that the sound absorption cotton is glass fibre cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720400047.6U CN207160298U (en) | 2017-04-17 | 2017-04-17 | A kind of double cosine sound absorbers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720400047.6U CN207160298U (en) | 2017-04-17 | 2017-04-17 | A kind of double cosine sound absorbers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207160298U true CN207160298U (en) | 2018-03-30 |
Family
ID=61709875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720400047.6U Active CN207160298U (en) | 2017-04-17 | 2017-04-17 | A kind of double cosine sound absorbers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207160298U (en) |
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2017
- 2017-04-17 CN CN201720400047.6U patent/CN207160298U/en active Active
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