CN201262829Y - Special noise absorption type soundproof equipment - Google Patents
Special noise absorption type soundproof equipment Download PDFInfo
- Publication number
- CN201262829Y CN201262829Y CNU2008200649445U CN200820064944U CN201262829Y CN 201262829 Y CN201262829 Y CN 201262829Y CN U2008200649445 U CNU2008200649445 U CN U2008200649445U CN 200820064944 U CN200820064944 U CN 200820064944U CN 201262829 Y CN201262829 Y CN 201262829Y
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- Prior art keywords
- sound
- acoustic
- special
- sound insulating
- insulationg board
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model relates to a special sound absorption sound insulating device which consists of sound insulating boards on the four walls and a sound insulating board on the top cap, thus forming a box type closed structure. The closed structure is characterized in that the sound insulating boards are divided into a plurality of resonance cavities, the inner parts of which are filled with three sound absorption materials in sequence; in the thickness direction, the sound absorption materials have density gradient and fiber diameter gradient; and the inner wall of the sound absorption board is special-shaped structure. The sound insulating board body is made of steel plates. The special-shaped structure relates to that the sound adsorption inner wall can be of special shape, trapezoid, triangle, etc. The sound insulating device of the structure has wide adaptive frequency and good sound absorption effect.
Description
Technical field:
The wood utility model relates to the sound arrester that a kind of noise control engineering is used, the extraordinary absorbing sound type sound insulation of especially a kind of novel wideband equipment.
Background technology:
At present, the sound insulationg board interior wall construction is single, sound insulationg board section configuration and area in same cross section or different cross section do not change, only the noise to some frequency has defening effect preferably, the noise of all the other frequencies will appear acoustic hood, continues contaminated environment.So sound insulation efficient is not high, it is narrow to adapt to noise spectrum.
Summary of the invention
Problem to be solved in the utility model is to overcome existing sound insulation equipment to adapt to deficiencies such as frequency is narrow, acoustically effective is bad, a kind of extraordinary absorbing sound type sound insulation equipment is provided, form by wall sound insulationg board and top cover sound insulationg board, constitute a box enclosed construction, it is characterized in that: sound insulationg board is separated into several resonant cavities; The inside of resonant cavity is filled with three kinds of acoustic absorbants successively, at the thickness direction acoustic absorbant density gradient and fibre diameter gradient is arranged; The acoustic board inwall is a polymorphic structure.The sound insulationg board body is made by steel plate.
Polymorphic structure is meant that the sound absorption inwall can be special shapes such as trapezoidal, triangle.
The inside of resonant cavity is filled with three kinds of acoustic absorbants successively, at the thickness direction acoustic absorbant density gradient and fibre diameter gradient is arranged.For example, along thickness direction, first kind of acoustic absorbant can be got rubber powder, silica sand etc.; Second kind of acoustic absorbant can be got super glass wool; The third acoustic absorbant can be got organic fire-resisting material, dacron thread etc.
The beneficial effects of the utility model are: special-shaped interior wall construction of the present utility model can realize that the air layer thickness continuous stepless changes between the double-layer sound absorbing structure, make the sound absorption cover not have fixing natural frequency, improve defening effect, secondly, special-shaped interior wall construction of the present utility model makes the sound absorption area much larger than projected area, so sound absorption efficiency height, adapt to wide frequency range, noise frequency improves the density of the acoustic absorbant of 8-17Db. different parts than conventional structure from the sound deadening capacity of each frequency range of 30-12000HZ, the diameter gradient, thickness is all inequality, sound insulationg board does not have certain natural frequency, so sound absorption efficiency improves.The abnormity inwall adds said structure, and sound wave can not reflect, and reverberation can not take place yet; Air column in resonant cavity statuary column plug under the effect of sound wave equally vibrates, and absorbs acoustic energy, and the mechanical vibration of acoustic absorbant also absorb acoustic energy and be translated into heat energy dissipation in addition.The natural frequency of sound insulation equipment is below 4HZ, and noise reduction improves 17-20Db.
Description of drawings:
Fig. 1 is the diagrammatic cross-section of sound insulationg board.
Embodiment:
Sound insulationg board is separated into several resonant cavities by dividing plate 5; The inside of resonant cavity is filled with three kinds of acoustic absorbants successively, is followed successively by: the thickness of silica sand 2, super glass wool 3,6, three kinds of materials of dacron thread has nothing in common with each other according to frequency of sound wave is different.Sound insulationg board body 1 is made by steel plate.Sound insulationg board inwall 4 is a trapezium structure.
The inwall of employing trapezium structure makes the shear wave and compressional wave mutual interference mutually in the sonic propagation process, thereby reduces noise.
Claims (3)
1. an extraordinary absorbing sound type sound insulation equipment is made up of wall sound insulationg board and top cover sound insulationg board, constitutes a box enclosed construction, and it is characterized in that: sound insulationg board is separated into several resonant cavities; The inside of resonant cavity is filled with three kinds of acoustic absorbants successively, at the thickness direction acoustic absorbant density gradient and fibre diameter gradient is arranged; The acoustic board inwall is a polymorphic structure.
2. a kind of extraordinary absorbing sound type sound insulation equipment according to claim 1, it is characterized in that: the sound insulationg board body is made by steel plate.
3. a kind of extraordinary absorbing sound type sound insulation equipment according to claim 1, it is characterized in that: three kinds of acoustic absorbants are silica sand, super glass wool, dacron thread successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200649445U CN201262829Y (en) | 2008-09-01 | 2008-09-01 | Special noise absorption type soundproof equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200649445U CN201262829Y (en) | 2008-09-01 | 2008-09-01 | Special noise absorption type soundproof equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201262829Y true CN201262829Y (en) | 2009-06-24 |
Family
ID=40809306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200649445U Expired - Fee Related CN201262829Y (en) | 2008-09-01 | 2008-09-01 | Special noise absorption type soundproof equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201262829Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044239B (en) * | 2009-10-22 | 2013-01-09 | 北京绿创声学工程股份有限公司 | Micro-perforated plate with resonant sound absorption structure |
| CN104386540A (en) * | 2014-10-20 | 2015-03-04 | 江苏铭龙铝镁合金科技有限公司 | Winding silencer |
| CN107170438A (en) * | 2017-07-05 | 2017-09-15 | 国网河南省电力公司 | A kind of resistive filled type sound-absorbing composite board of density gradient |
-
2008
- 2008-09-01 CN CNU2008200649445U patent/CN201262829Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102044239B (en) * | 2009-10-22 | 2013-01-09 | 北京绿创声学工程股份有限公司 | Micro-perforated plate with resonant sound absorption structure |
| CN104386540A (en) * | 2014-10-20 | 2015-03-04 | 江苏铭龙铝镁合金科技有限公司 | Winding silencer |
| CN107170438A (en) * | 2017-07-05 | 2017-09-15 | 国网河南省电力公司 | A kind of resistive filled type sound-absorbing composite board of density gradient |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090624 Termination date: 20100901 |