CN203393862U - Wideband sound absorbing wall - Google Patents
Wideband sound absorbing wall Download PDFInfo
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- CN203393862U CN203393862U CN201320416568.2U CN201320416568U CN203393862U CN 203393862 U CN203393862 U CN 203393862U CN 201320416568 U CN201320416568 U CN 201320416568U CN 203393862 U CN203393862 U CN 203393862U
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- sound absorbing
- sound
- absorbing
- wedge
- wedges
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Abstract
The utility model discloses a wideband sound absorbing wall. The wideband sound absorbing wall comprises a sound absorbing bottom plate and sound absorbing wedges which are arranged on the sound absorbing bottom plate, wherein the sound absorbing wedges have a shape which is produced according to the following method; the specific method comprises the following steps: 1, equally dividing two bevel edges into three equal parts from a wedge in the shape of a regular triangle; 2, forming equilateral triangles outwards by taking the middle lengths of the bevel edges in the previous step as bottom edges and then removing the bottom edges; 3, repeating the steps 1 and 2 for 2-5 times. According to the sound absorbing wall, the surface area can be continuously increased so as to increase the frequency range of sound absorption under the condition that the sound absorbing wedges have a certain volume; meanwhile, the reflection frequency of sound wave between the sound absorbing wedges can be increased by the bent surface shape, the sound absorbing proportion is improved, and the sound absorbing effect of the sound absorbing wall is enhanced through the superposition effect of the two beneficial effects.
Description
Technical field
The utility model relates to a kind of sound-absorbing wall, specifically a kind of broadband acoustical absorption wall.
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 chamber.Therefore, acoustical absorption wall is had relatively high expectations to sound absorption qualities.
With reference to Fig. 1, existing acoustical absorption wall comprises one deck base plate and is arranged on the sound-absorbing wedge on base plate.Its sound-absorbing 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, increase the frequency range of absorbed sound, will inevitably cause wedge material and structure to occupy the indoor usefull space.So be necessary this to improve.And Koch curve structure has self-similarity nature, can increase the effective height of sound-absorbing wedge, reduce the low-limit frequency of effective sound-absorbing, curved surface pattern can increase the order of reflection of sound wave between sound-absorbing wedge simultaneously, improved sound-absorbing ratio, two kinds of beneficial effect superpositions, have strengthened the sound-absorbing effect of this acoustical absorption wall.
Summary of the invention
The utility model object is to improve above-mentioned defect of the prior art, improves the sound-absorbing wedge in acoustical absorption wall, improves the sound absorption qualities of acoustical absorption wall.
Technical scheme
In order to realize the object that strengthens acoustical absorption wall sound absorption qualities, the technical solution adopted in the utility model is:
An acoustical absorption wall, comprises a sound-absorbing base plate and is arranged on the sound-absorbing wedge on sound-absorbing base plate, and described sound-absorbing wedge has the shape of producing in accordance with the following methods: concrete grammar is:
The first step, since an equilateral triangle wedge, two hypotenuses are divided into three equal parts;
Second step, then take the intermediate length of previous step hypotenuse outwards makes respectively equilateral triangle as base, then removing base;
The 3rd step, repeat the above-mentioned first step and second step 2～5 times..
Described sound-absorbing wedge is made by 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-absorbing wedge of the present utility model, repeat each time to generate equilateral triangle, all make the surface area of sound-absorbing wedge increase, and the volume of sound-absorbing wedge is substantially constant, thereby in the situation that using material quantity necessarily and taking up room given volume, increase the effective height of sound-absorbing wedge, reduce the low-limit frequency of effective sound-absorbing, expanded the frequency range of absorb sound, curved surface pattern can increase the order of reflection of sound wave between sound-absorbing wedge simultaneously, has improved sound-absorbing ratio.
Accompanying drawing explanation
The conventional acoustical absorption wall structural representation of Fig. 1;
The structural representation of Fig. 2 the utility model broadband acoustical absorption wall;
Fig. 3 the utility model sound-absorbing wedge generates schematic diagram, and wherein a is original equilateral triangle wedge, and b is the wedge shape while repeating a time; C is for repeating the wedge shape of twice o'clock; D is the wedge shape in triplicate time.
1. sound-absorbing base plates in figure; 2. sound-absorbing wedge; 3. pedestal; 4. tortuous surperficial.
The specific embodiment
Below in conjunction with accompanying drawing, further describe in detail:
With reference to Fig. 2, broadband acoustical absorption wall is comprised of one deck sound-absorbing base plate 1 and the sound-absorbing wedge 2 being arranged on sound-absorbing base plate.Wherein sound-absorbing wedge 2 is made by centrifugally glass-wool, inorganic foamed or other damping materials, and sound-absorbing wedge 2 has pedestal 3 and the tortuous surface 4 being connected with base plate.
With reference to Fig. 3, the generation of sound-absorbing wedge is divided into three equal parts (except the one side being connected with base plate) since an equilateral triangle wedge ，Ba Meitiao limit, and then the intermediate length on Yi Ge limit is that equilateral triangle ，Zai Ba“ base is outwards done respectively on base " line segment erases.Repeat this process 2～5 times.Suppose that number of repetition is n, the initial equilateral triangle length of side is
l,
The limit number of sound-absorbing wedge is
,
The length of side on sound-absorbing wedge Mei Tiao limit is
,
The girth in sound-absorbing wedge cross section is
,
The area in sound-absorbing wedge cross section is
.
Can find out that girth is along with number of repetition is exponent increase, and there is limiting value in the increase of area
.Therefore, in the situation that guarantee using material quantity certain, this invention can constantly increase the surface area of sound-absorbing wedge, increase the effective height of sound-absorbing wedge, has widened the frequency range of absorb sound, has strengthened sound absorption qualities.Meanwhile, more complicated, curved surface pattern can increase the order of reflection of sound wave between sound-absorbing wedge, has improved sound-absorbing ratio.
Claims (1)
1. a broadband acoustical absorption wall, comprises a sound-absorbing base plate and is arranged on the sound-absorbing wedge on sound-absorbing base plate, it is characterized in that: described sound-absorbing wedge has according to the limit number of the shape of Koch curve structural generation and sound-absorbing wedge and is
, n=2～5 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320416568.2U CN203393862U (en) | 2013-07-15 | 2013-07-15 | Wideband sound absorbing wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320416568.2U CN203393862U (en) | 2013-07-15 | 2013-07-15 | Wideband sound absorbing wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203393862U true CN203393862U (en) | 2014-01-15 |
Family
ID=49905402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320416568.2U Withdrawn - After Issue CN203393862U (en) | 2013-07-15 | 2013-07-15 | Wideband sound absorbing wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203393862U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334505A (en) * | 2013-07-15 | 2013-10-02 | 东南大学 | Broadband sound absorption wall body |
| US20220062056A1 (en) * | 2018-12-31 | 2022-03-03 | Honeywell International Inc. | Apparatuses, systems, and methods for increasing or manipulating noise attenuation in hearing protection device |
| US12029628B2 (en) * | 2019-02-20 | 2024-07-09 | Honeywell International Inc. | Apparatuses, systems, and methods for increasing or manipulating noise attenuation in hearing protection device |
-
2013
- 2013-07-15 CN CN201320416568.2U patent/CN203393862U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334505A (en) * | 2013-07-15 | 2013-10-02 | 东南大学 | Broadband sound absorption wall body |
| CN103334505B (en) * | 2013-07-15 | 2015-05-06 | 东南大学 | Broadband sound absorption wall body |
| US20220062056A1 (en) * | 2018-12-31 | 2022-03-03 | Honeywell International Inc. | Apparatuses, systems, and methods for increasing or manipulating noise attenuation in hearing protection device |
| US12029628B2 (en) * | 2019-02-20 | 2024-07-09 | Honeywell International Inc. | Apparatuses, systems, and methods for increasing or manipulating noise attenuation in hearing protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140115 Effective date of abandoning: 20150506 |
|
| RGAV | Abandon patent right to avoid regrant |