CN202948717U - Noise reduction structure - Google Patents
Noise reduction structure Download PDFInfo
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- CN202948717U CN202948717U CN 201220423684 CN201220423684U CN202948717U CN 202948717 U CN202948717 U CN 202948717U CN 201220423684 CN201220423684 CN 201220423684 CN 201220423684 U CN201220423684 U CN 201220423684U CN 202948717 U CN202948717 U CN 202948717U
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Abstract
The utility model relates to a noise reduction structure comprising more than two layers of resonance thin film materials. Soft thin films having uneven surfaces and air-flow obstruction are employed. Because the soft thin films have the uneven surfaces, the absorption peak value of the resonance structure is deviated towards the low frequency, thereby absorbing the low frequencies conveniently. When sounds at medium and high frequencies are incident from different angles, sound waves can be reflected on the surfaces of the thin films many times. Therefore, the chance for passing through the thin films with air-flow obstruction by the sound waves can be substantially increased, the strong reflection of the sounds at medium and high frequencies by the smooth thin films with the air-flow obstruction can be avoided, and thus most of the sounds at the medium and high frequencies can enter the structure body successfully for absorption, thereby realizing the absorption of the sounds at the low, medium and high frequencies.
Description
Technical field
The utility model relates to a kind of sound-deadening and noise-reducing treatment technology, particularly a kind of noise-reducing structure for noise reduction process.
Background technology
In daily life, commercial production and business environment, noise pollution is very serious sometimes, brings puzzlement for people's work and the quality of life.In order to reduce the harmful effect that in environment, noise pollution is brought, the quieter material of fiber-like is because it is ultra-thin, soft, weatherability strong, it is aging to be difficult for, and the characteristics such as easy construction, cheapness, is widely used.
Yet, the quieter material of fiber-like, its erasure effect can be affected by the thickness of the diameter of fiber, and fibrous material is thinner, and its erasure effect increases in higher frequency band, but erasure effect is bad aspect low frequency.As, diameter is the PP fiber of 2～6 microns, it just has erasure effect preferably to the noise more than audio frequency 3000Hz, can not satisfy the requirement of high-end user to the acoustically effective of the noise of 125～2000Hz scope.As will all reach satisfied acoustically effective in the wide frequency ranges of 125～6000Hz, can only significantly increase thickness and the consumption of material, and this will cause cost significantly to increase, and make the cost performance of quieter material significantly reduce.
Perforate and half perforate foaming kind quieter material can adjust best noise reduction frequency range by percentage of open area and the hole density of adjusting foam, but they can not be taken into account the erasure effect to high frequency noise and low-frequency noise.Make the high and low frequency noise all have erasure effect preferably, need to significantly increase equally thickness and the consumption of material, cost is significantly promoted.
The utility model content
The utility model is intended to provide a kind ofly can in the situation that do not increase thickness and the consumption of material, take into account the noise-reducing structure of the noise-reduction effect of low-frequency noise and high frequency noise simultaneously.
Noise-reducing structure described in the utility model, comprise the quieter material body that is consisted of by fiber-like material or foaming kind material, the quieter material body is provided with two-layer above film, the quieter material body is separated be a plurality of parts, form the different membrane resonance structure of distance, each film is made by flexible material, its became uneven, surface undulation and uneven.
Noise-reducing structure described in the utility model, the multilayer film of quieter material body setting have consisted of the not identical membrane resonance structure of a plurality of distances.Quieter material body both sides arrange film, make film namely form a plurality of resonance absorbing peaks to the good absorption of the formation of noise in a plurality of frequencies and near frequency range, make quieter material have good erasure effect.Secondly, the film quality that the present invention adopts is soft, surface undulation is uneven, and it can make the absorption peak of resonant structure be offset to low-frequency range, is more conducive to the absorption of low frequency.Up-and-down surface, can also make high-frequency noises when incident from different perspectives, sound wave has an opportunity on the surface of film, reflection more frequently to occur, the chance of the film that sound wave intercepts by air-flow is greatly increased, avoided the strong reflection of the centering high-frequency sound that causes because of smooth air-flow barrier film, be absorbed thereby most of medium-high frequency sound can be entered in the quieter material body smoothly.In addition, film became uneven, uneven, can make the stack that has the different noise reduction peak of a large amount of absorption peaks in whole noise-reducing structure, cause the resonance absorbing peak of film to broaden, thereby only the interior absorption of specific narrow band limits is good especially to avoid appearance, and other band limits absorbs very poor situation, makes noise-reducing structure can all have erasure effect preferably in wider frequency range.
Noise-reducing structure described in the utility model, the membrane resonance structure that consists of by multilayer film forms the absorption peak to the noise of a plurality of different frequency sections; The film surface that rises and falls by softness, absorption peak is offset to low frequency, film by became uneven again, widened absorption peak, improve simultaneously the absorption to high-frequency noises, thereby make noise-reducing structure of the present invention, in the situation that do not increase material thickness and consumption, have the good absorption characteristic at the noise of wider frequency range, realized taking into account that high, normal, basic audio-frequency noise absorbs.
Described film is the film with air-flow barrier, have film that air-flow intercepts but high frequency is had stronger reflection, thereby be unfavorable for the absorption to high frequency noise.Usually in order to improve the absorption to high frequency noise, can take the method for acanthopore on film, thereby reduce film to the reflection of high frequency, improve the absorption to high frequency noise.Yet acanthopore also can reduce the erasure effect of medium and low frequency simultaneously, has affected again the absorption of noise from another angle.the present invention has the structure of the up-and-down soft-surface of film combination film of air-flow barrier by setting, make high-frequency noises when the incident from different perspectives by up-and-down soft-surface structure, reflection repeatedly occurs in sound wave on the surface of film, the chance of the film that sound wave intercepts by air-flow is greatly increased, significantly reduced the strong reflection effect of air-flow barrier film centering high-frequency sound, in the situation that adopt the air-flow barrier film, make most of medium-high frequency sound enter smoothly the quieter material body and be absorbed, simultaneously, it adopts the air-flow barrier film, can centering, the absorption of low-frequency noise exerts an influence, thereby can better take into account height, in, the absorption of low-frequency noise, sound-absorbing effect is very good.
Description of drawings
Fig. 1 is a kind of schematic diagram of noise-reducing structure.
Fig. 2 is the schematic diagram of another kind of noise-reducing structure.
Fig. 3 is the schematic diagram of another kind of noise-reducing structure.
Embodiment
Embodiment one
A kind of noise-reducing structure, as Fig. 1, comprise the first fibrous material layer 2 and the second fibrous material layer 4 that are consisted of by fiber-like material, plastic sheeting 3, the first fibrous material layers made by PP and the outside of the second fibrous material layer are set between the first fibrous material layer and the second fibrous material layer the film 1,5 of being made by PE and PET material is set respectively.Each layer film soft surface, uneven thickness, surface undulation and uneven.The common membrane resonance structure that consists of of the film in the film between two-layer fibrous material layer and two outsides forms the absorption peak to the noise of a plurality of different frequency sections; Thereby reach good sqouynd absorption lowering noise effect.Spacing between each film can be different, are also that the thickness of fibrous material layer is different, by the setting of different spacing, can strengthen the difference of the frequency range of each resonance absorbing peak, make silencing cotton have good noise-reduction effect to the noise of wide frequency ranges more.And the film of the soft PP film that rises and falls, PE/PET composition makes the absorption peak of resonant structure be offset to low-frequency range, thereby make up to a certain extent fibrous material layer to the high frequency good muffling effect, and to the defective of low frequency erasure effect deviation, further make from another point of view fibrous material have good noise-reduction effect to the noise of wide frequency ranges more.The density of material of the different parts of each film itself also can be inhomogeneous, the density of zones of different is different, the subregion density of material is larger, and the subregion density of material is less, it has widened the width of resonance absorbing peak, can further improve the performance muffler of fibrous material equally, make described noise-reducing structure have good noise-reduction performance.
The noise-reducing structure of the present embodiment can be by the thermal synthesis one between its layers of material, also can glue together to be integrated, and also can directly be superimposed together.
The noise-reducing structure of the present embodiment, the surface undulation of its each layer film is uneven, forms the staggered waveform of Wave crest and wave trough.Between the peak valley of wave, distance and peak height are advisable between 1 micron～10 millimeters.
In the present embodiment, fibrous material also can partly or entirely be replaced as expanded material.
Embodiment two
A kind of noise-reducing structure, as Fig. 2, comprise fibrous material layer 2, the both sides of fibrous material layer are provided with film 1,3, the film of the softness that described film is formed by a kind of materials processing in PP, PE, PET, EVA material, the film of the softness that perhaps is mixed and processed for wherein multiple material.The soft surface of described film, uneven; The uneven thickness of while film, density unevenness, and surface irregularity.
Embodiment three
A kind of noise-reducing structure, as Fig. 3, the quieter material body is made of fibrous material layer 4 and foamed material layer 6, be provided with film 3 between fibrous material layer and foamed material layer, the epidermis of the air-flow obstruct that described film can form for by the film of a kind of material in PP, PE, PET, EVA material or the multiple softness that processes or expanded material foaming the time.The arranged outside of fibrous material layer has by a kind of materials processing in PP, PE, PET, EVA material and forms, the film 1 of the softness that perhaps is mixed and processed for wherein multiple material.The arranged outside of foamed material layer has by a kind of materials processing in PP, PE, PET, EVA material and forms, the flexible film 5 that the epidermis that the air-flow that perhaps is mixed and processed for wherein multiple material or form during the expanded material foaming intercepts forms.
Described foamed material layer 6 can be the expanded material of perforate and/or part perforate and makes.Can adjust as required the percentage of open area of expanded material, so that expanded material has best noise reduction frequency range.
Claims (7)
1. noise-reducing structure, comprise the quieter material body that is consisted of by fiber-like material and/or foaming kind material, it is characterized in that: the quieter material body is provided with two-layer above film, the quieter material body is separated be plural part, form the different membrane resonance structure of distance, each film is made by flexible material, its became uneven, surface undulation and uneven.
2. a kind of noise-reducing structure according to claim 1, it is characterized in that: described quieter material body is separated by divided thin film, and the both sides of quieter material body arrange respectively film.
3. a kind of noise-reducing structure according to claim 1 and 2, is characterized in that: the density of material inequality of described film itself, zones of different density difference.
4. a kind of noise-reducing structure according to claim 1 and 2, it is characterized in that: described film is the film with air-flow barrier.
5. a kind of noise-reducing structure according to claim 1 and 2, it is characterized in that: the surface of described film is undulating movement, and between the crest of its wave and trough, distance and peak height are between 1 micron～10 millimeters.
6. a kind of noise-reducing structure according to claim 1 and 2, it is characterized in that: described quieter material body comprises fibrous material layer and foamed material layer simultaneously, between fibrous material layer and foamed material layer, film is set.
7. a kind of noise-reducing structure according to claim 1 and 2, it is characterized in that: described film is a kind of the processing in PP, PE, PET, EVA material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220423684 CN202948717U (en) | 2012-08-24 | 2012-08-24 | Noise reduction structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220423684 CN202948717U (en) | 2012-08-24 | 2012-08-24 | Noise reduction structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202948717U true CN202948717U (en) | 2013-05-22 |
Family
ID=48424409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220423684 Withdrawn - After Issue CN202948717U (en) | 2012-08-24 | 2012-08-24 | Noise reduction structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202948717U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820029A (en) * | 2012-08-24 | 2012-12-12 | 广州市泰力高复合材料有限公司 | Muffling structure |
| CN103741822A (en) * | 2014-01-23 | 2014-04-23 | 浙江润阳新材料科技有限公司 | Efficient sound insulating pad |
| CN108458467A (en) * | 2017-02-17 | 2018-08-28 | S.I.Pan公司 | Separator and silencer including the separator |
-
2012
- 2012-08-24 CN CN 201220423684 patent/CN202948717U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820029A (en) * | 2012-08-24 | 2012-12-12 | 广州市泰力高复合材料有限公司 | Muffling structure |
| CN102820029B (en) * | 2012-08-24 | 2014-06-18 | 广州市泰力高复合材料有限公司 | Muffling structure |
| CN103741822A (en) * | 2014-01-23 | 2014-04-23 | 浙江润阳新材料科技有限公司 | Efficient sound insulating pad |
| CN108458467A (en) * | 2017-02-17 | 2018-08-28 | S.I.Pan公司 | Separator and silencer including the separator |
| US10508828B2 (en) | 2017-02-17 | 2019-12-17 | S.I.Pan | Splitter and sound attenuator including the same |
| CN108458467B (en) * | 2017-02-17 | 2020-11-10 | S.I.Pan公司 | Separator and muffler including the same |
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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: 20130522 Effective date of abandoning: 20140618 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130522 Effective date of abandoning: 20140618 |
|
| RGAV | Abandon patent right to avoid regrant |