CN205789089U - A kind of sound absorption unit body and sound-absorbing system - Google Patents
A kind of sound absorption unit body and sound-absorbing system Download PDFInfo
- Publication number
- CN205789089U CN205789089U CN201620715439.7U CN201620715439U CN205789089U CN 205789089 U CN205789089 U CN 205789089U CN 201620715439 U CN201620715439 U CN 201620715439U CN 205789089 U CN205789089 U CN 205789089U
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- sound
- unit body
- microperforated panel
- absorption unit
- utility
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Abstract
The utility model discloses a kind of sound absorption unit body and sound-absorbing system, relate to silencing equipment field.A kind of sound absorption unit body, it is made up of microperforated panel and helmholtz resonance sound absorber, and profile is cuboid, and described microperforated panel is positioned at the top of helmholtz resonance sound absorber；Described helmholtz resonance sound absorber includes shell, described enclosure forms lower chamber and upper cavity, described upper cavity arranges a passage, the upper end of described passage is communicated to microperforated panel, the lower end of passage connects with lower chamber, being filled with fibrous material in described upper cavity, fibrous membrane is posted in the inner side of described microperforated panel.This utility model is a kind of cell cube, can be in conjunction with needs combination in any；A kind of sound absorption unit body that this utility model provides not only has stronger Absorption to low frequency noise, adds the frequency range of absorption simultaneously, can meet the demand of adsorption frequency by adjusting housing depth.
Description
Technical field
This utility model relates to silencing equipment field, is specifically related to a kind of sound absorption unit body and sound-absorbing system.
Background technology
Environment in recent years noise has become a kind of important public hazards, is one of the most global important environmental pollution.Noise
The improvement polluted has become the important content of home and abroad environment protection work.Helmholtz resonance sound absorber has the strongest sound-absorbing
Performance, but its frequency range absorbing noise is narrower.
Utility model content
The purpose of this utility model is for the defect in above-mentioned background technology, it is provided that a kind of low frequency noise is had stronger
Absorption, adds the sound absorption unit body of the frequency range of absorption simultaneously.
In order to reach above-mentioned technique effect, this utility model takes techniques below scheme: a kind of sound absorption unit body, it by
Microperforated panel and helmholtz resonance sound absorber composition, profile is cuboid, and described microperforated panel is positioned at helmholtz resonance
The top of sound absorber；Described helmholtz resonance sound absorber includes shell, and described enclosure forms lower chamber and upper cavity, institute
Stating upper cavity and arrange a passage, the upper end of described passage is communicated to microperforated panel, and the lower end of passage connects with lower chamber, described on
Being filled with fibrous material in cavity, fibrous membrane is posted in the inner side of described microperforated panel.
As preferably, above-mentioned sound absorption unit body, its profile is in cuboid, and cross section is square；Described rectangular
The height of the bodily form is H, and the length of side of cross section is a, and they meet relation H=2a.
Meanwhile, this utility model also provides for a kind of sound-absorbing system, and it is made up of at least two above-mentioned sound absorption unit body.
This utility model compared with prior art, has following beneficial effect: this utility model is a kind of cell cube, can
Combination in any is needed to combine；Low frequency noise is not only had stronger absorption to make by a kind of sound absorption unit body that this utility model provides
With, add the frequency range of absorption simultaneously, the demand of adsorption frequency can be met by adjusting housing depth.
Accompanying drawing explanation
Fig. 1 is this utility model main TV structure schematic diagram；
Fig. 2 is this utility model plan structure schematic diagram.
Detailed description of the invention
Below in conjunction with embodiment of the present utility model, this utility model is further elaborated.
Embodiment:
As it is shown in figure 1, a kind of sound absorption unit body, it is made up of microperforated panel 1 and helmholtz resonance sound absorber, described micro-
Perforated plate 1 is positioned at the top of helmholtz resonance sound absorber.The profile of sound absorption unit body is cuboid, and the present embodiment is preferred,
The cross section of sound absorption unit body is square；The height of cuboid is H, and the length of side of cross section is a, and they meet relation H=
2a。
Described helmholtz resonance sound absorber includes shell 4, and described enclosure forms lower chamber 5 and upper cavity 6, described
Lower chamber 5 normality is cavity, interior can fiberfill fibers material 3, whether fill sound absorption qualities impact little.Described upper cavity 6 sets
Putting a passage 7, the upper end of described passage 7 is communicated to microperforated panel 1, and the lower end of passage 7 connects with lower chamber 5, described upper cavity 6
Inside being filled with fibrous material 3, fibrous membrane 2 is posted in the inner side of described microperforated panel 1.
Above-mentioned sound absorption unit body, can be inhaled by multiple above-mentioned any stacked groups of sound absorption unit body synthesis one in conjunction with needs
System for electrical teaching.
Operation principle of the present utility model is:
As depicted in figs. 1 and 2, the height of sound absorption unit body is H, a length of a of bottom sides, and the height of lower chamber is h, upper cavity
The internal diameter d of passage.
Wherein h '=H-h, c are the velocity of sound, and v is the volume of lower chamber；F is the resonance frequency of the most hereby resonant absorber (Hai Shi pipe)
Rate.In the case of size dimension is certain bottom sound absorption unit body, adjusts the height h of lower chamber, frequency f can be changed.
Owing to the resonance frequency range of Hai Shi pipe is narrower, this utility model is combined with microperforated panel at the top of Hai Shi pipe,
Microperforated panel widens the frequency range to noise absorption, pastes fibrous membrane and can provide sound absorption qualities inside microperforated panel.Micropunch
The sound absorption qualities of plate is relevant with cavity thickness after thickness of slab, aperture, the punching rate of plate and plate.
It is understood that embodiment of above be merely to illustrate that principle of the present utility model and use exemplary
Embodiment, but this utility model is not limited thereto.For those skilled in the art, without departing from this
In the case of the spirit of utility model and essence, can make various modification and improvement, these modification and improvement are also considered as this reality
With novel protection domain.
Claims (3)
1. a sound absorption unit body, it is characterised in that: it is made up of microperforated panel (1) and helmholtz resonance sound absorber, profile
In cuboid, described microperforated panel (1) is positioned at the top of helmholtz resonance sound absorber；Described helmholtz resonance sound absorber
Including shell (4), described enclosure forms lower chamber (5) and upper cavity (6), and described upper cavity (6) arranges a passage (7),
The upper end of described passage (7) is communicated to microperforated panel (1), and the lower end of passage (7) connects with lower chamber (5), described upper cavity (6)
Inside being filled with fibrous material (3), fibrous membrane (2) is posted in the inner side of described microperforated panel (1).
A kind of sound absorption unit body the most according to claim 1, it is characterised in that: its profile is cuboid, cross section
For square；The height of described cuboid is H, and the length of side of cross section is a, and they meet relation H=2a.
3. a sound-absorbing system, it is characterised in that: it is by least two sound-absorbing list as described in claim 1 or claim 2
Unit's body composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620715439.7U CN205789089U (en) | 2016-07-07 | 2016-07-07 | A kind of sound absorption unit body and sound-absorbing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620715439.7U CN205789089U (en) | 2016-07-07 | 2016-07-07 | A kind of sound absorption unit body and sound-absorbing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205789089U true CN205789089U (en) | 2016-12-07 |
Family
ID=58124025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620715439.7U Expired - Fee Related CN205789089U (en) | 2016-07-07 | 2016-07-07 | A kind of sound absorption unit body and sound-absorbing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205789089U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109147749A (en) * | 2018-06-15 | 2019-01-04 | 大连理工大学 | A kind of high acoustic absorption rate connection shape multi-cavity mode of resonance anechoic coating |
| CN109817435A (en) * | 2019-02-27 | 2019-05-28 | 中国科学院电工研究所 | The spiral cavity type sound proof window device of for transformer ventilation noise reduction |
| CN112811216A (en) * | 2019-11-18 | 2021-05-18 | 精工爱普生株式会社 | Recording apparatus |
| CN113362796A (en) * | 2021-05-10 | 2021-09-07 | 西安交通大学 | Two-way rough inner insertion tube type Helmholtz resonance sound absorption structure |
-
2016
- 2016-07-07 CN CN201620715439.7U patent/CN205789089U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109147749A (en) * | 2018-06-15 | 2019-01-04 | 大连理工大学 | A kind of high acoustic absorption rate connection shape multi-cavity mode of resonance anechoic coating |
| CN109817435A (en) * | 2019-02-27 | 2019-05-28 | 中国科学院电工研究所 | The spiral cavity type sound proof window device of for transformer ventilation noise reduction |
| CN109817435B (en) * | 2019-02-27 | 2021-04-09 | 中国科学院电工研究所 | Spiral cavity type sound insulation window device for ventilation and noise reduction of transformer |
| CN112811216A (en) * | 2019-11-18 | 2021-05-18 | 精工爱普生株式会社 | Recording apparatus |
| CN113362796A (en) * | 2021-05-10 | 2021-09-07 | 西安交通大学 | Two-way rough inner insertion tube type Helmholtz resonance sound absorption structure |
| CN113362796B (en) * | 2021-05-10 | 2024-05-24 | 西安交通大学 | Bidirectional rough interpolation tube type Helmholtz resonance sound absorption structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20170707 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |