CN103334505B - Broadband sound absorption wall body - Google Patents
Broadband sound absorption wall body Download PDFInfo
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- CN103334505B CN103334505B CN201310293939.7A CN201310293939A CN103334505B CN 103334505 B CN103334505 B CN 103334505B CN 201310293939 A CN201310293939 A CN 201310293939A CN 103334505 B CN103334505 B CN 103334505B
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- sound absorption
- wedge
- sound
- wall body
- base plate
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Abstract
The invention discloses a broadband sound absorption wall body which comprises a sound absorption base board and sound absorption wedges which are mounted on the sound absorption base board. The shape of each sound absorption wedge is manufactured through the following method: S1, two bevel edges unconnected with the base board of a regular triangle wedge are respectively divided into three equal parts, S2, the middle part of one bevel edge of the S1 is used as a bottom edge, a regular triangle is make outwards, then the bottom edge is removed, and S3, the S1 and the S2 are repeated 2 to 5 times. By means of the broadband sound absorption wall body, the superficial area of each sound absorption wedge is increased continuously under the condition the volume of the sound absorption wedge is unchanged, and therefore the frequency range of sound absorption is increased. Moreover, the number of inflection of sound waves among the sound absorption wedges can be increased by means of the curving surface appearances of the sound absorption wedges, and the sound absorption ratio is improved. The sound absorption effect of the sound absorption wall is enhanced through the superposition of the above two advantages.
Description
Technical field
The present invention relates to a kind of sound-absorbing wall, specifically a kind of broadband sound absorption wall body.
Background technology
Acoustical absorption wall is widely used in the acoustic measurement on the products such as machinery, electronics and Medical Devices, and it can be used as the wall part of medical audiometry diagnosis room, recording studio and noise testing room.Therefore, acoustical absorption wall requires higher to sound absorption qualities.
With reference to Fig. 1, existing acoustical absorption wall comprises one deck base plate and is arranged on the sound absorption wedge on base plate.Its sound absorption wedge is generally triangle, there are some researches show, the low-limit frequency of required absorption sound wave depends on wedge height.By controlling leg-of-mutton height to increase the frequency range of absorbed sound, wedge materials and structures will inevitably be caused to occupy the indoor usefull space.So be necessary to improve this.And Koch curve structure has self-similarity nature, the effective height of sound absorption wedge can be increased, reduce the low-limit frequency of effective sound-absorbing, curved surface pattern can increase the order of reflection of sound wave between sound absorption wedge simultaneously, improve sound-absorbing ratio, two kinds of beneficial effect superpositions, enhance the sound-absorbing effect of this acoustical absorption wall.
Summary of the invention
The object of the invention is to improve above-mentioned defect of the prior art, improves the sound absorption wedge in acoustical absorption wall, improves the sound absorption qualities of acoustical absorption wall.
Technical scheme
In order to realize the object strengthening acoustical absorption wall sound absorption qualities, the technical solution used in the present invention is:
A kind of broadband sound absorption wall body, comprise a sound-absorbing base plate and be arranged on the sound absorption wedge on sound-absorbing base plate, described sound absorption wedge has the shape of producing in accordance with the following methods: concrete grammar is:
The first step, from an equilateral triangle wedge, two hypotenuses be not connected with described base plate of equilateral triangle are divided into three equal parts;
Second step, then with the intermediate length of previous step hypotenuse for equilateral triangle is made respectively to outer in base, then remove base;
3rd step, repeat the above-mentioned first step and second step 2 ~ 5 times.
Described sound absorption wedge is made up of centrifugally glass-wool or inorganic foamed sound absorption material; Described sound-absorbing base plate adopts metallic fiber sound absorption material to make.
Beneficial effect
Sound absorption wedge of the present invention, repeat each time to generate equilateral triangle, the surface area of sound absorption wedge is all made to increase, and the volume of sound absorption wedge is substantially constant, thus when use material quantity certain and take up room given volume, increase the effective height of sound absorption wedge, reduce the low-limit frequency of effective sound-absorbing, expanded absorb the frequency range of sound, curved surface pattern can increase the order of reflection of sound wave between sound absorption wedge simultaneously, improves sound-absorbing ratio.
Accompanying drawing explanation
The conventional acoustical absorption wall structural representation of Fig. 1;
The structural representation of Fig. 2 broadband sound absorption wall body of the present invention;
Fig. 3 sound absorption wedge of the present invention generates schematic diagram, and wherein a is original equilateral triangle wedge, wedge shape when b is repetition one time; Wedge shape when c is repetition twice; D be in triplicate time wedge shape.
1. sound-absorbing base plates in figure; 2. sound absorption wedge; 3. pedestal; 4. Tortuous Surface.
Detailed description of the invention
Further describe in detail below in conjunction with accompanying drawing:
With reference to Fig. 2, broadband sound absorption wall body is made up of one deck sound-absorbing base plate 1 and the sound absorption wedge 2 be arranged on sound-absorbing base plate.Wherein sound absorption wedge 2 is made up of centrifugally glass-wool, inorganic foamed or other damping materials, and sound absorption wedge 2 has the pedestal 3 and Tortuous Surface 4 that are connected with base plate.
With reference to Fig. 3, the generation of sound absorption wedge is from an equilateral triangle wedge, every bar limit is divided into three equal parts (except the one side be connected with base plate), then with the intermediate length on each limit for equilateral triangle is made respectively to outer in base, then " base " line segment to be erased.Repeat this process 2 ~ 5 times.Suppose that number of repetition is n, the initial equilateral triangle length of side is L, then
The limit number of sound absorption wedge is 24
n,
The length of side on the every bar limit of sound absorption wedge is L/3
n,
The girth in sound absorption wedge cross section is 2 (4/3)
nl,
The area in sound absorption wedge cross section is
Can find out that girth exponentially increases along with number of repetition, and there is limiting value in the increase of area
therefore, when ensureing to use material quantity certain, this invention constantly can increase the surface area of sound absorption wedge, increases the effective height of sound absorption wedge, widened absorb the frequency range of sound, enhance sound absorption qualities.Meanwhile, more complicated, curved surface pattern can increase the order of reflection of sound wave between sound absorption wedge, improves sound-absorbing ratio.
Claims (2)
1. a broadband sound absorption wall body, comprises a sound-absorbing base plate and is arranged on the sound absorption wedge on sound-absorbing base plate, it is characterized in that: described sound absorption wedge has the shape of producing in accordance with the following methods: concrete grammar is:
The first step, from an equilateral triangle wedge, two hypotenuses be not connected with described base plate of equilateral triangle are divided into three equal parts;
Second step, then with the intermediate length of previous step hypotenuse for equilateral triangle is made respectively to outer in base, then remove base;
3rd step, repeat the above-mentioned first step and second step 2 ~ 5 times.
2. broadband sound absorption wall body according to claim 1, is characterized in that: described sound absorption wedge is made up of centrifugally glass-wool or inorganic foamed sound absorption material; Described sound-absorbing base plate adopts metallic fiber sound absorption material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310293939.7A CN103334505B (en) | 2013-07-15 | 2013-07-15 | Broadband sound absorption wall body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310293939.7A CN103334505B (en) | 2013-07-15 | 2013-07-15 | Broadband sound absorption wall body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103334505A CN103334505A (en) | 2013-10-02 |
| CN103334505B true CN103334505B (en) | 2015-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310293939.7A Active CN103334505B (en) | 2013-07-15 | 2013-07-15 | Broadband sound absorption wall body |
Country Status (1)
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| CN (1) | CN103334505B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514858B (en) * | 2017-07-12 | 2020-04-21 | 青岛海尔股份有限公司 | Compressor bin for refrigerator and refrigerator with same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1072882A (en) * | 1976-09-13 | 1980-03-04 | Body Guard Inc. | Sound-absorption panel |
| CN201121371Y (en) * | 2007-09-30 | 2008-09-24 | 四川正升环保科技有限公司 | Soundproofing inner wall surface |
| CN101408042A (en) * | 2007-10-11 | 2009-04-15 | 雅马哈株式会社 | Sound absorbing structure and sound chamber |
| CN203393862U (en) * | 2013-07-15 | 2014-01-15 | 东南大学 | Wideband sound absorbing wall |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0586658A (en) * | 1991-09-25 | 1993-04-06 | Matsushita Electric Works Ltd | Composite sound insulating material and sound insulating wall structure |
| JP3263630B2 (en) * | 1997-06-04 | 2002-03-04 | 三菱重工業株式会社 | Sound insulation board |
| JPH11247322A (en) * | 1998-03-04 | 1999-09-14 | Jsp Corp | Plastic-made radio wave obstruction prevention sound insulation wall |
-
2013
- 2013-07-15 CN CN201310293939.7A patent/CN103334505B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1072882A (en) * | 1976-09-13 | 1980-03-04 | Body Guard Inc. | Sound-absorption panel |
| CN201121371Y (en) * | 2007-09-30 | 2008-09-24 | 四川正升环保科技有限公司 | Soundproofing inner wall surface |
| CN101408042A (en) * | 2007-10-11 | 2009-04-15 | 雅马哈株式会社 | Sound absorbing structure and sound chamber |
| CN203393862U (en) * | 2013-07-15 | 2014-01-15 | 东南大学 | Wideband sound absorbing wall |
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| CN103334505A (en) | 2013-10-02 |
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