CN111540340A - Noise environment treatment method - Google Patents
Noise environment treatment method Download PDFInfo
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- CN111540340A CN111540340A CN202010386590.1A CN202010386590A CN111540340A CN 111540340 A CN111540340 A CN 111540340A CN 202010386590 A CN202010386590 A CN 202010386590A CN 111540340 A CN111540340 A CN 111540340A
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- noise
- sound absorption
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- frequency spectrum
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000010521 absorption reaction Methods 0.000 claims abstract description 48
- 239000000463 material Substances 0.000 claims abstract description 32
- 238000001228 spectrum Methods 0.000 claims abstract description 19
- 239000011358 absorbing material Substances 0.000 claims description 23
- 239000000835 fiber Substances 0.000 claims description 19
- 238000013459 approach Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 241000282414 Homo sapiens Species 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 238000009413 insulation Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 230000001743 silencing effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/161—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Chemical & Material Sciences (AREA)
- Aviation & Aerospace Engineering (AREA)
- Combustion & Propulsion (AREA)
- Fluid Mechanics (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a noise environment treatment method, which comprises the steps of measuring and recording the noise frequency spectrum of a noise source, comparing with an NR curve, and adjusting the sound absorption coefficient of a sound absorption material with the frequency in a sound absorption layer according to the frequency-by-frequency comparison result to enable the noise frequency spectrum after sound absorption by the sound absorption layer to be close to the NR curve. According to the reaction of human beings to sound waves, the sound absorption coefficients of sound absorption materials with different frequencies are adjusted according to the noise frequency spectrum of a noise source, and finally the noise frequency spectrum is close to an NR curve after noise reduction is realized, so that people in a noise environment have no discomfort after noise reduction.
Description
Technical Field
The invention relates to a noise environment treatment method, and belongs to the technical field of noise treatment equipment.
Background
In order to solve the problem, in the prior art, a large number of sound absorption and insulation covers are used for covering the equipment to reduce noise pollution, however, in daily maintenance of the equipment, maintenance personnel are required to enter the sound absorption and insulation covers and still be damaged by noise; although the sound absorption wall is adopted in the sound absorption and insulation cover, the sound absorption wall only slightly reduces reverberation and standing waves in the sound absorption and insulation chamber, the problem of noise pollution is not solved, maintenance personnel still can be damaged by noise, and the problem cannot be well solved in the prior art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a noise environment treatment method capable of well solving noise pollution.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the noise environment treating method includes measuring and recording the noise frequency spectrum of the noise source, comparing the measured and recorded noise frequency spectrum with NR curve, and regulating the sound absorbing coefficient of the sound absorbing material in the sound absorbing layer based on the comparison result to make the noise frequency spectrum approach the NR curve.
Further, the sound absorption material is a fibrous sound absorption material.
Furthermore, the density of the fiber sound absorption material is 20-40 kg/m3The diameter of the fiber is less than or equal to 4.0 um.
Furthermore, the fibers of the sound absorbing material are free of any material that affects the vibration thereof.
Further, the sound absorption materials of the sound absorption layer are the same or different.
Furthermore, the sound absorption materials of the sound absorption layer are the same in material.
The invention has the beneficial effects that: according to the reaction of human beings to sound waves, aiming at the noise frequency spectrum of a noise source, the sound absorption coefficients of sound absorption materials with different frequencies are adjusted, and finally the noise frequency spectrum is close to an NR curve after noise reduction is realized, so that people in a noise environment have no discomfort after noise reduction.
Drawings
The invention is further elucidated with reference to the drawings and the embodiments.
Fig. 1 is a graph of the spectrum of the present invention.
Detailed Description
Example 1
The noise environment treating method includes measuring and recording the noise frequency spectrum of the noise source, comparing the measured and recorded noise frequency spectrum with NR curve, and regulating the sound absorbing coefficient of the sound absorbing material in the sound absorbing layer based on the comparison result to make the noise frequency spectrum approach the NR curve.
Taking a certain actually measured noise source as an example, as shown in fig. 1, when the comparison result of the noise source and the NR curve with an equivalent sound value of 70dB is 1000Hz, the noise amount is 80dB, and according to the noise reduction requirement, the noise reduction amount reaches 10dB at 1000Hz, and the sound absorption coefficient of the sound absorbing material is adjusted accordingly. Finally, the frequency spectrum curve of the noise source after sound absorption through the sound absorption layer is close to the NR curve, the sound absorption coefficients of the sound absorption materials with different frequencies are adjusted according to the reaction of human beings to sound waves and aiming at the noise frequency spectrum of the noise source, and finally the noise frequency spectrum is close to the NR curve after noise reduction is realized, so that people in a noise environment have no discomfort after noise reduction.
Example 2
As a preferable technical solution of embodiment 1, the sound absorbing material is a fibrous sound absorbing material.
Preferably, the fibers of the sound absorbing material are free of any material that affects the vibration thereof.
The density of the fiber sound absorption material is 20-40 kg/m3The diameter of the fiber is less than or equal to 4.0 um.
As will be known to those skilled in the art, sound absorbing materials are divided into many kinds, such as porous sound absorbing materials, inorganic foam materials, fiber sound absorbing materials, polystyrene materials, foam plastic materials, etc., and the performance and sound absorbing principle of each different sound absorbing material are different, in order to implement the technical solution of embodiment 1, the inventor finds out after various experiments that the fiber sound absorbing materials can achieve the effect of the technical solution of embodiment 1, and moreover, the fibers cannot influence the vibration of the materials, and particularly cannot adopt the manner of gluing, etc.
Even if the fibrous sound-absorbing material is used, the above parameter requirements are satisfied because the fibrous sound-absorbing material has a density of less than 20 kg/m3When the sound absorption effect is reduced, the overall sound absorption performance is reduced; when the density of the fiber sound absorption material is more than 40kg/m3The sound absorption effect of high frequencies is reduced, resulting in a reduction in the overall sound absorption performance. If the fiber diameter is more than 4.0um, the sound absorption coefficient is reduced, and the sound absorption performance and the sound attenuation effect are influenced.
In this embodiment, if there is a material, such as glue or adhesive, between fibers of the sound absorbing material that affects the vibration of the sound absorbing material, the elasticity of the fiber sound absorbing material is reduced, and the noise reduction effect is obviously reduced as the diameter of the fibers is increased.
The embodiment can simultaneously generate the silencing effect aiming at high, medium and low frequencies in noise, thereby meeting the requirement of noise reduction, comprehensively realizing that the noise reduction basically conforms to an NR curve, and ensuring that people do not feel uncomfortable.
Example 3
The definition in this example is a specific design scheme for example 1 or 2. The sound absorption materials of the sound absorption layer are the same or different in material. Preferably, the sound-absorbing materials of the sound-absorbing layer are made of the same material, and the sound-absorbing coefficient of the sound-absorbing material made of the same material is adjusted to meet the requirement of the embodiment 1, so that the requirement of the filling density and the requirement of the performance after filling can be met more easily during the production of the silencer.
The fiber sound absorption material is divided into an organic fiber material and an inorganic fiber material, and in use, for the sound absorption layer, the inventor only needs to consider the sound absorption frequency and the sound absorption effect, so that the same type or different types are adopted for the sound absorption material, and the fiber sound absorption material is not particularly limited, but needs to meet the requirement of embodiment 1 on noise reduction.
Through the above embodiments, those skilled in the art can understand that the technical solution of the present invention is a principle, and the noise treatment is developed for different frequencies of the whole noise, covering high, medium, and low frequencies, therefore, the present invention is comprehensive, not one-sided, and not simply reducing the equivalent sound value of the noise in solving the noise pollution.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (6)
1. The noise environment treating method includes measuring and recording the noise frequency spectrum of the noise source, comparing the measured and recorded noise frequency spectrum with NR curve, and regulating the sound absorbing coefficient of the sound absorbing material in the sound absorbing layer based on the comparison result to make the noise frequency spectrum approach the NR curve.
2. The noise environment improvement method according to claim 1, wherein: the sound absorbing material is a fibrous sound absorbing material.
3. The noise environment improvement method according to claim 2, wherein: the density of the fiber sound absorption material is 20-40 kg/m3The diameter of the fiber is less than or equal to 4.0 um.
4. The noise environment improvement method according to claim 2, wherein: the fibers of the sound absorbing material are free of any material that affects the vibration thereof.
5. The noise environment improvement method according to claim 1, wherein: the sound absorption materials of the sound absorption layer are the same or different in material.
6. The noise environment improvement method according to claim 5, wherein: the sound absorption materials of the sound absorption layer are the same in material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010386590.1A CN111540340A (en) | 2020-05-09 | 2020-05-09 | Noise environment treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010386590.1A CN111540340A (en) | 2020-05-09 | 2020-05-09 | Noise environment treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111540340A true CN111540340A (en) | 2020-08-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010386590.1A Pending CN111540340A (en) | 2020-05-09 | 2020-05-09 | Noise environment treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111540340A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03276030A (en) * | 1990-03-27 | 1991-12-06 | Takenaka Komuten Co Ltd | Noise evaluating and analyzing device |
| CN1699934A (en) * | 2005-04-13 | 2005-11-23 | 广州市环境监测中心站 | Method for measuring and evaluating room noise of civil architecture |
| US20120236426A1 (en) * | 2010-01-29 | 2012-09-20 | Fujifilm Corporation | Polymerizable composition, color filter, method of producing color filter and solid-state image sensor |
| CN104121232A (en) * | 2014-05-19 | 2014-10-29 | 安徽三星环保装备制造有限公司 | Large fan in-out air muffling tower |
| CN107177933A (en) * | 2017-04-20 | 2017-09-19 | 全球能源互联网研究院 | A kind of blended fiber sound-absorbing material and preparation method thereof |
-
2020
- 2020-05-09 CN CN202010386590.1A patent/CN111540340A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03276030A (en) * | 1990-03-27 | 1991-12-06 | Takenaka Komuten Co Ltd | Noise evaluating and analyzing device |
| CN1699934A (en) * | 2005-04-13 | 2005-11-23 | 广州市环境监测中心站 | Method for measuring and evaluating room noise of civil architecture |
| US20120236426A1 (en) * | 2010-01-29 | 2012-09-20 | Fujifilm Corporation | Polymerizable composition, color filter, method of producing color filter and solid-state image sensor |
| CN104121232A (en) * | 2014-05-19 | 2014-10-29 | 安徽三星环保装备制造有限公司 | Large fan in-out air muffling tower |
| CN107177933A (en) * | 2017-04-20 | 2017-09-19 | 全球能源互联网研究院 | A kind of blended fiber sound-absorbing material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 胡华康等: "《纺织工业噪声测量和控制》", 中国纺织工业出版社, pages: 217 * |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20220831 Address after: 235000 No.1 Zhongbang Pioneer Park, Duji District, Huaibei City, Anhui Province Applicant after: Anhui Sanxing Environmental Protection Engineering Co.,Ltd. Address before: 235000 Room 401, unit 1, building 10, 21 Dongshan Road, Xiangshan District, Huaibei City, Anhui Province Applicant before: Wu Guangming |
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Application publication date: 20200814 |