CN202170576U - Bass trap - Google Patents
Bass trap Download PDFInfo
- Publication number
- CN202170576U CN202170576U CN2011201371528U CN201120137152U CN202170576U CN 202170576 U CN202170576 U CN 202170576U CN 2011201371528 U CN2011201371528 U CN 2011201371528U CN 201120137152 U CN201120137152 U CN 201120137152U CN 202170576 U CN202170576 U CN 202170576U
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- porosity
- utility
- damping material
- low frequency
- model
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Abstract
The utility model belongs to the field of acoustic absorption equipment and discloses a bass trap comprising a cylindrical perforated plate, wherein the cylindrical perforated plate is filled with a porous sound-absorbing material which is internally provided with a cavity, and sealing covers are respectively arranged above and below the porous sound-absorbing material and provided with perforated type connecting pieces. The utility model aims at providing a bass trap which is small in body form, convenient to use and high in absorptivity.
Description
Technical field
The utility model relates to the sound absorption devices field, relates in particular to a kind of low frequency trap.
Background technology
At present building acoustics is decorated low-frequency sound wave absorption technique and the low-frequency sound wave absorption plant finished product in field, research and development theoretical foundation all from the quarter-wave theory of physical acoustics (internal diameter of low frequency absorption plant be absorb the peak low band wavelength 1/4th).Because the low-frequency sound wave sound wave is very long, thus the equal bulky of low frequency absorption plant, and also the low frequency uptake is not high, inefficiency.
The utility model content
The purpose of the utility model is to provide the low frequency that a kind of bodily form is small and exquisite, easy to use, absorptivity is high trap.
The complete skill scheme of the utility model is, a kind of low frequency trap comprises a cylindrical perforations plate, is filled with the porosity damping material in the said cylindrical perforations plate, and said porosity damping material set inside has a cavity; Said porosity damping material top, below are provided with a seal cover.
Optional, the said porosity damping material outside is enclosed with one deck gas permeability armour layer.
Optional, the said perforated plate outside is enclosed with one deck fabric finish coat.
Preferably, said seal cover is provided with the perforated connector.
Therefore a kind of low frequency trap of the utility model has following beneficial effect:
Porosity damping material middle part is provided with a cavity in the utility model, and the porous sound-absorbing material arranged outside has a perforated plate, and porous is given birth to sound absorption material and is provided with a seal cover up and down; The cavity of the inside that makes reaches zero acoustic pressure; When sound wave, the acoustic pressure difference forces acoustic energy by the zero pressure regions active movement of space outerpace to low frequency trap inside, and the medium-high frequency sound wave is perforated the plate reflection; Low-frequency sound wave passes perforated plate; Absorbed by the porosity damping material, this process changes into air movement with acoustic pressure, and lets acoustic energy and porous sound-absorbing material friction be converted into heat energy.
Description of drawings
Accompanying drawing described herein is used to provide the further understanding to the utility model, constitutes the application's a part, does not constitute the improper qualification to the utility model, in the accompanying drawings:
Fig. 1 is the vertical section structure sketch map of 1 one kinds of low frequency traps of embodiment;
Fig. 2 is 1 one kinds of low frequency traps of embodiment cross section structure sketch map.
The specific embodiment
To combine accompanying drawing and specific embodiment to specify the utility model below, be used for explaining the utility model in the illustrative examples and the explanation of this utility model, but not as the qualification to the utility model.
Embodiment 1:
A kind of low frequency trap of present embodiment; Comprise a cylindrical perforations plate 1; Be filled with porosity damping material 2 in the cylindrical perforations plate 1; Porosity damping material 2 set inside have a cavity 3, and porous is given birth to damping material 2 outsides and is enclosed with one deck gas permeability armour layer 4, prevent that the living sound absorption material of porous from outwards overflowing; Porosity damping material 2 tops, below are provided with a seal cover 5; Seal cover 5 is provided with perforated connector 6; The outside of perforated plate 1 is enclosed with one deck fabric finish coat 7.
The theoretical foundation of this low-frequency sound wave absorption plant is acoustic pressure difference active absorption principle.Because low-frequency sound wave energy very big (for example the all-bottom sound wave energy causes the solid vibrations), when low-frequency sound wave moves in the space, acoustic energy can cause in the space acoustic pressure very big.At this moment the sealed cavity 3 in the middle of the porosity damping material 2; Acoustic pressure in the sealed cavity 3 is zero; At this moment sound wave will be by the big space of acoustic pressure to the little spatial movement of acoustic pressure, and the medium-high frequency sound wave is perforated plate 1 reflection, and low-frequency sound wave passes perforated plate 1; Between two spaces, set up the porosity damping material, in the unidirectional motion that this acoustic pressure difference causes, absorb consumption to sound wave.
This device uses cylinder as outward appearance, mainly is in order to maximize its effective absorbing area at limited volume.For the ease of transportation and carrying, this device is removable to be divided into a plurality of cylinders, piles up during use together, uses the combination of perforated connector to fix between the cylinder.
Therefore porosity damping material middle part is provided with a cavity in the utility model, and the porous sound-absorbing material arranged outside has a perforated plate; Porous is given birth to sound absorption material and is provided with a seal cover up and down, and the cavity of the inside that makes reaches zero acoustic pressure, when sound wave; The acoustic pressure difference forces acoustic energy by the zero pressure regions active movement of space outerpace to low frequency trap inside; The medium-high frequency sound wave is perforated the plate reflection, and low-frequency sound wave passes perforated plate, is absorbed by the porosity damping material; This process changes into air movement with acoustic pressure, and lets acoustic energy and porous sound-absorbing material friction be converted into heat energy.
The porous sound-absorbing material outside is enclosed with one deck gas permeability armour layer, prevents that porous sound-absorbing material is excessive; The appearance design of this low frequency trap becomes cylinder, can farthest increase its absorption area; Seal cover is provided with the perforated connector, need not to install, and is placed into the space and get final product, and split type the assembling is provided with that to let carrying debug convenient.
More than technical scheme that the utility model embodiment is provided carried out detailed introduction; Used concrete example among this paper principle and the embodiment of the utility model embodiment are set forth, the explanation of above embodiment only is applicable to the principle that helps to understand the utility model embodiment; Simultaneously, for one of ordinary skill in the art, according to the utility model embodiment, the part that on the specific embodiment and range of application, all can change, in sum, this description should not be construed as the restriction to the utility model.
Claims (4)
1. a low frequency trap is characterized in that, comprises a cylindrical perforations plate, is filled with the porosity damping material in the said cylindrical perforations plate, and said porosity damping material set inside has a cavity; Said porosity damping material top, below are provided with a seal cover.
2. a kind of low frequency trap according to claim 1 is characterized in that, the said porosity damping material outside is enclosed with one deck gas permeability armour layer.
3. a kind of low frequency trap according to claim 1 is characterized in that, the said perforated plate outside is enclosed with one deck fabric finish coat.
4. a kind of low frequency trap according to claim 1 is characterized in that said seal cover is provided with the perforated connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201371528U CN202170576U (en) | 2011-05-04 | 2011-05-04 | Bass trap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201371528U CN202170576U (en) | 2011-05-04 | 2011-05-04 | Bass trap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202170576U true CN202170576U (en) | 2012-03-21 |
Family
ID=45828771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201371528U Expired - Fee Related CN202170576U (en) | 2011-05-04 | 2011-05-04 | Bass trap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202170576U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161089A (en) * | 2015-06-17 | 2015-12-16 | 成都斯铂润音响设备有限公司 | Sound absorbing device |
-
2011
- 2011-05-04 CN CN2011201371528U patent/CN202170576U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161089A (en) * | 2015-06-17 | 2015-12-16 | 成都斯铂润音响设备有限公司 | Sound absorbing device |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120321 Termination date: 20160504 |