CN210032167U - Low-frequency noise insulation board and sound insulation cover - Google Patents
Low-frequency noise insulation board and sound insulation cover Download PDFInfo
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- CN210032167U CN210032167U CN201920216676.2U CN201920216676U CN210032167U CN 210032167 U CN210032167 U CN 210032167U CN 201920216676 U CN201920216676 U CN 201920216676U CN 210032167 U CN210032167 U CN 210032167U
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Abstract
The application discloses a low frequency noise sound insulation board andthe sound insulation cover, the sound insulation board includes: the sound insulation structure layer is detachably spliced with the outer wall decoration layer; the sound insulation structure layer sequentially comprises a first galvanized sheet layer, a first damping sound insulation layer, a sound absorption cotton layer, a second damping sound insulation layer and a second galvanized sheet layer; the sound absorption structure layer comprises a honeycomb aluminum layer, a sound absorption material layer, a waterproof dustproof layer and a porous plate layer in sequence. In the application, the sound insulation plate is made of sound insulation and absorption composite noise reduction materials, has good noise reduction performance on noise within the range of 50Hz to 20kHz, and has LAThe comprehensive noise reduction amount is more than 40dB, and the wall body made of the composite material is suitable for processing the peak noise with the frequency of about 200Hz and can effectively eliminate the low-frequency noise.
Description
Technical Field
The application belongs to the technical field of noise processing, and particularly relates to a low-frequency noise insulation board and an insulation cover.
Background
Noise pollution is one of the adverse factors affecting people's health and normal life in today's society, and there is an increasingly severe trend as society develops. The noise can be divided into high-frequency noise and low-frequency noise, the low-frequency noise is less than 200Hz, and the high-frequency noise can be attenuated rapidly along with the increase of the distance or the obstruction of an obstacle; while low frequency noise waves are long and can travel long distances across obstacles, and decay very slowly as the distance increases. Therefore, the low frequency noise is much more difficult to handle than the high frequency noise. Common low-frequency noise sources in the living environment of people include elevators, water pumps, fans, transformers, rail transit, household appliances and the like.
The sound source control is considered as the most effective method for controlling noise, and a sound insulation cover is additionally arranged at a sound source, so that the sound absorption and sound insulation effects are achieved, and the sound is prevented from being transmitted to the external environment. Existing sound insulation enclosures typically count the sound level (L) from a reduction aAeq: under the weighting condition of A, the equivalent continuous sound levels of the noises with different frequencies in a period of time) are designed from the aspect of decibel value, and the sound absorption and insulation effect on the noises with specific frequency bands is not high in selectivity and strong in pertinence, and especially the noise reduction effect on the low-frequency noises of about 200Hz is not obvious. However, common noise sources in life, such as residential substations, residential distribution rooms, rail transit, fans and the like, are still dominant factors of low-frequency noise, and cause wide residential noise complaints.
Therefore, in order to solve the problem that low-frequency noise is difficult to process in sound source control, it is necessary to develop a sound insulation cover particularly suitable for processing low-frequency noise.
SUMMERY OF THE UTILITY MODEL
In view of this, the present application provides a low-frequency noise insulation board and a sound insulation cover, where the sound insulation board is made of a composite sound absorption material, and the noise resistance to low-frequency noise is greatly improved.
The present application provides in a first aspect a low frequency noise insulation panel comprising: the sound insulation structure layer is detachably spliced with the outer wall decoration layer, the sound insulation structure layer and the sound absorption structure layer in sequence, and the distances between the outer wall decoration layer, the sound insulation structure layer and the sound absorption structure layer and a noise source are gradually reduced; the sound insulation structure layer comprises a first galvanized sheet layer, a first damping sound insulation layer, a sound absorption cotton layer, a second damping sound insulation layer and a second galvanized sheet layer which are sequentially connected; the sound absorption structure layer comprises a honeycomb aluminum layer, a sound absorption material layer, a waterproof dustproof layer and a porous plate layer which are sequentially connected.
Preferably, gaps among the first galvanized plate layer, the first damping layer, the sound-absorbing cotton layer, the second damping layer and the second galvanized plate layer are sealed through sealant; the honeycomb aluminum layer, the sound absorbing material layer, the waterproof dustproof layer and the gap between the porous plate layers are sealed through the sealant.
Preferably, the first galvanized sheet layer and the second galvanized sheet layer are both hot-dip galvanized materials.
Preferably, the honeycomb aluminum layer is a honeycomb plate structure made of aluminum foil.
Preferably, the first damping soundproof layer and the second damping soundproof layer are both damping rubber materials.
Preferably, the preparation material of the sound absorption cotton layer comprises a polyurethane material and a polystyrene material.
A second aspect of the application provides a low-frequency noise insulation cover, which comprises a sound insulation cover frame and a plurality of low-frequency noise insulation boards, an air inlet channel, an air exhaust channel and a monitoring controller, wherein the low-frequency noise insulation boards are arranged on the first aspect; the low-frequency noise insulation board is fixed on the sound insulation cover frame to form a hollow sound insulation cover, an air inlet channel is installed on the side wall of the sound insulation cover, and an air exhaust channel is installed at the top of the sound insulation cover; the monitoring controller is arranged on the inner wall of the wall body of the low-frequency noise insulation board, is electrically connected with the air exhaust channel and the air inlet channel, and is used for monitoring the working environment of the sound-proof cover and controlling the opening and closing of the air inlet channel and the air exhaust channel.
Preferably, still include soundproof door, soundproof door includes low frequency noise sound insulating board with embedded in the glass window of low frequency noise sound insulating board, the glass window is double glazing structure, through damping rubber strip with low frequency noise sound insulating board sealing connection.
Preferably, the monitoring controller specifically includes intelligent control terminal, entrance guard's unit, temperature and humidity sensor, smoke detector, water logging detector, camera, audible-visual annunciator and uninterrupted power source, intelligent control terminal connects respectively entrance guard's unit temperature and humidity sensor smoke detector the water logging detector the camera audible-visual annunciator with uninterrupted power source.
Preferably, the air exhaust channel and the air inlet channel have the same structure and are both fixed with the low-frequency noise sound insulation plate, and the air exhaust channel specifically comprises an air exhaust outlet, a ventilation silencer and an exhaust fan; the exhaust outlet is communicated with the outside, and the exhaust fan is fixed on the low-frequency noise insulation board.
To sum up, the present application provides a low frequency noise sound barrier, comprising: the sound insulation structure layer is detachably spliced with the outer wall decoration layer; the sound insulation structure layer sequentially comprises a first galvanized sheet layer, a first damping sound insulation layer, a sound absorption cotton layer, a second damping sound insulation layer and a second galvanized sheet layer; the sound absorption structure layer comprises a honeycomb aluminum layer, a sound absorption material layer, a waterproof dustproof layer and a porous plate layer in sequence.
In the application, the sound insulation plate is made of sound insulation and absorption composite noise reduction materials, has good noise reduction performance on noise within the range of 50Hz to 20kHz, and has LAThe comprehensive noise reduction amount is more than 40dB, and the wall body made of the composite material is suitable for processing the peak noise with the frequency of about 200Hz and can effectively eliminate the low-frequency noise.
Drawings
Fig. 1 is a schematic structural diagram of a low-frequency noise insulation panel according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a porous plate layer of a low-frequency noise insulation panel according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a honeycomb aluminum layer of a low-frequency noise insulation panel according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a low-frequency noise insulation cover according to another embodiment of the present application;
fig. 5 is a schematic view illustrating an installation of an exhaust passage of a low frequency noise insulation cover according to another embodiment of the present application;
FIG. 6 is a schematic view illustrating an installation of an air inlet channel of a low frequency noise insulation cover according to another embodiment of the present application;
wherein the reference numbers are as follows:
10. an outer wall decorative layer; 20. a sound insulation structure layer; 30. a sound absorbing structural layer; 21. a first galvanized sheet layer; 22. a first damping soundproof layer; 23. a sound absorbing cotton layer; 24. a second damping soundproof layer; 25. a second galvanized sheet layer; 31. a honeycomb aluminum layer; 32. a sound absorbing material layer; 33. a waterproof dust-proof layer; 34. a porous plate layer.
Detailed Description
According to the low-frequency noise insulation board and the sound insulation cover provided by the embodiment of the application, the sound insulation board is made of sound insulation and sound absorption composite noise reduction materials, the noise insulation board has good noise reduction performance on the noise within the range of 50Hz-20kHz, and L isAThe comprehensive noise reduction amount is more than 40dB, and the wall body made of the composite material is suitable for processing the peak noise with the frequency of about 200Hz and can effectively eliminate the low-frequency noise.
The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless explicitly stated or limited otherwise; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1-3, fig. 1 is a schematic structural diagram of a low-frequency noise insulation board according to an embodiment of the present disclosure; fig. 2 is a schematic structural diagram of a porous plate layer 34 of a low-frequency noise insulation board according to an embodiment of the present disclosure; fig. 3 is a schematic structural diagram of a honeycomb aluminum layer 31 of a low-frequency noise insulation panel according to an embodiment of the present invention;
the present application provides in a first aspect a low frequency noise insulation panel comprising: the outer wall decoration layer 10, the sound insulation structure layer 20 and the sound absorption structure layer 30 are detachably spliced in sequence, and the distances between the outer wall decoration layer 10, the sound insulation structure layer 20 and the sound absorption structure layer 30 and a noise source are gradually reduced; the sound insulation structure layer 20 sequentially comprises a first galvanized sheet layer 21, a first damping sound insulation layer 22, a sound absorption cotton layer 23, a second damping sound insulation layer 24 and a second galvanized sheet layer 25; the sound absorption structure layer 30 sequentially comprises a honeycomb aluminum layer 31, a sound absorption material layer 32, a waterproof dustproof layer 33 and a porous plate layer 34.
Referring to fig. 1, the low-frequency noise insulation board provided in the embodiment of the present application includes, in order from far to near according to a distance from a noise source, an outer wall decoration layer 10, a sound insulation structure layer 20, and a sound absorption structure layer 30 that are detachably spliced together; the outer wall decoration layer 10 is farthest from a sound source, has a thickness of about 2-4 mm, can be prepared from materials including but not limited to glass fiber reinforced plastics, aluminum pinch plates, pvc plates, aluminum plastic plates and the like, and can play roles in decoration, landscape adjustment, surface water prevention and corrosion prevention; the sound insulation structure layer 20 is arranged on the inner side of the outer wall decoration layer 10, a double-layer sound insulation structure design is adopted, the total thickness is about 5-6 cm, and the sound insulation structure layer 20 comprises a first zinc-plated layer, a first damping sound insulation layer 22, a sound absorption cotton layer 23, a second damping sound insulation layer 24 and a second zinc-plated layer 25 which are detachably spliced together in sequence from far to near according to the distance from a noise source; the sound absorption structure layer 30 is located the sound insulation structure layer 20 inboard, is formed by porous sound absorption structure preparation, and thickness is about 4 ~ 6cm, comprises aluminium honeycomb layer 31, sound absorption material layer 32, waterproof dust layer 33 and porous sheet layer 34 from outside to inside in proper order, can play the effect of resonance sound absorption, can effectively eliminate low frequency pitch tone.
Further, gaps among the first galvanized sheet layer 21, the first damping layer, the sound-absorbing cotton layer 23, the second damping layer and the second galvanized sheet layer 25 are sealed through sealant; gaps among the honeycomb aluminum layer 31, the sound absorbing material layer 32, the waterproof and dustproof layer 33 and the porous plate layer 34 are sealed by a sealant.
Wherein, the low frequency noise sound insulating board that this application embodiment provided is detachable modular design, but sound insulating board on-the-spot concatenation and dismantlement, and the clearance between the various sheet layers of installation adopts sealed glue to seal, and the fire rating of wall body is more than B1.
Further, the first galvanized sheet layer 21 and the second galvanized sheet layer 25 are made of hot galvanizing materials.
The first galvanized sheet layer 21 and the second galvanized sheet layer 25 are mainly prepared by hot galvanizing materials, and the density is not lower than 7.0 multiplied by 103kg/m3And the thickness is 0.8-2 mm, wherein the first galvanized sheet layer 21 and the outer wall decoration layer 10 are tightly combined.
Further, the honeycomb aluminum layer 31 is specifically a honeycomb plate structure made of aluminum foil.
As shown in fig. 3, the honeycomb aluminum layer 31 is mainly made of aluminum foil, has a honeycomb structure, has a honeycomb hole wall thickness of 0.04mm and a honeycomb side length of 1-2 mm, has a thickness of 6-10 mm, and is installed on the inner side of the second galvanized sheet layer 25;
the sound absorption material layer 32 is made of a porous material, can pass through one of a wood fiber sound absorption plate, melamine cotton, rock wool and glass cotton, has a thickness of 3-5 cm and a porosity of more than 90%, and is installed on the inner side of the honeycomb aluminum layer 31.
As shown in fig. 2, the porous plate layer 34 is installed on the innermost layer of the whole sound insulation plate, and is used for eliminating the pitch, and is mainly made of an aluminum plate, a color steel plate, a stainless steel plate, a galvanized plate, a pvc or a wood plate, the thickness of the porous plate layer is about 0.6mm, and the porous plate layer is designed into round holes, the round holes are arranged in a square shape, the aperture is 3mm, and the hole interval is 9 mm.
Further, the first damping soundproof layer 22 and the second damping soundproof layer 24 are each made of a damping rubber material.
The first damping sound-insulating layer 22 and the second damping sound-insulating layer 24 are prepared from damping rubber, the loss factor of the damping rubber is not lower than 0.5, the fire-proof grade is above grade B1, the damping rubber is bonded with a galvanized sheet by special damping rubber and is compressed by a plate pressing machine, and no gap is left in the middle; specifically, the first damping soundproof panel is closely combined with the first galvanized sheet layer 21, and the second damping soundproof panel is closely combined with the second galvanized sheet layer 25.
Further, the sound-absorbing cotton layer 23 is made of a material including a polyurethane material and a polystyrene material.
The sound-absorbing cotton layer 23 is mainly made of polyurethane and polystyrene materials, is arranged between the first damping sound-insulating layer 22 and the second damping sound-insulating layer 24, is 4-5 cm thick, has certain noise reduction and heat insulation functions, and is made of materials with the fire-proof grade above B1 grade.
The waterproof dustproof layer 33 comprises a waterproof layer and a dustproof net, wherein the waterproof layer is mainly prepared from a polyethylene film, has the thickness of 0.3mm and is mainly used for protecting the sound-absorbing material layer 32; the dust screen is installed in the waterproof layer inboard, and thickness is about 0.3 mm.
In order to describe the low-frequency noise insulation panel provided in the embodiments of the present application in detail, a low-frequency noise insulation cover provided in the embodiments of the present application will be described in detail below on the basis of the above embodiments, wherein the low-frequency noise insulation cover is mainly prepared from the low-frequency noise insulation panel described in the above embodiments.
Referring to fig. 4-6, fig. 4 is a schematic structural diagram of a low-frequency noise insulation cover according to another embodiment of the present application; fig. 5 is a schematic view illustrating an installation of an exhaust passage of a low frequency noise insulation cover according to another embodiment of the present application; FIG. 6 is a schematic view illustrating an installation of an air inlet channel of a low frequency noise insulation cover according to another embodiment of the present application;
the second aspect of the application provides a low-frequency noise insulation cover, which comprises a sound insulation cover frame, a plurality of low-frequency noise insulation boards of the first aspect, an air inlet channel, an air exhaust channel and a monitoring controller; the low-frequency noise insulation board is fixed on the sound insulation cover frame to form a hollow sound insulation cover, the side wall of the sound insulation cover is provided with an air inlet channel, and the top of the sound insulation cover is provided with an air exhaust channel; the monitoring controller is arranged on the inner wall of the wall body of the low-frequency noise insulation board, is electrically connected with the air exhaust channel and the air inlet channel, and is used for monitoring the working environment of the sound insulation cover and controlling the opening and closing of the air inlet channel and the air exhaust channel.
It should be noted that the sound insulation cover provided in another embodiment of the present application is a hollow sound insulation cover formed by fixing the low-frequency noise insulation boards described in the foregoing embodiments on a sound insulation cover frame from the top, front, rear, left and right, respectively, two air inlet channels are installed on the inner wall of the side wall of the sound insulation cover, and an air exhaust channel is installed on the outer side of the top of the sound insulation cover; and the monitoring controller is embedded in the inner wall of the wall body of the sound insulation plate, is electrically connected with the air exhaust channel and the air inlet channel, and can control the sound insulation cover by controlling the opening and closing of the air exhaust channel and the air inlet channel.
Further, still including soundproof door, soundproof door includes low frequency noise sound insulating board and the embedded glass window that has low frequency noise sound insulating board, and the glass window is double glazing structure, through damping rubber strip and low frequency noise sound insulating board sealing connection.
It should be noted that, the sound insulation cover provided by another embodiment of the present application further includes a sound insulation door, the sound insulation door is composed of a sound insulation plate and a glass window embedded in the sound insulation plate, the glass window is designed by using double-layer glass, the thickness of each layer of glass is 10-20 mm, an air gap of 20-30 mm is left between the two layers of glass, and the glass window and the noise reduction wall are sealed by using a damping rubber strip.
Further, the monitoring controller specifically comprises an intelligent control terminal, an access control unit, a temperature and humidity sensor, a smoke detector, a water immersion detector, a camera, an audible and visual alarm and an uninterruptible power supply, wherein the intelligent control terminal is respectively connected with the access control unit, the temperature and humidity sensor, the smoke detector, the water immersion detector, the camera, the audible and visual alarm and the uninterruptible power supply.
It should be noted that, the equipment of the sound insulation cover and the state change of the equipment environment can be monitored in real time and correspondingly adjusted through the intelligent control terminal, the entrance guard unit, the temperature and humidity sensor, the smoke detector, the water immersion detector, the camera, the audible and visual alarm and the uninterruptible power supply which are electrically connected with the monitoring control terminal.
Furthermore, the air exhaust channel and the air inlet channel have the same structure and are fixed with the low-frequency noise insulation plate, and the air exhaust channel specifically comprises an air outlet, a ventilation silencer and an exhaust fan; the exhaust outlet is communicated with the outside, and the exhaust fan is fixed on the low-frequency noise insulation board.
As shown in fig. 5 and 6, the air exhaust channel has the same structure as the air intake channel, but has different installation positions, wherein the air exhaust channel is fixed on the outer side of the sound insulation plate at the top of the sound insulation cover and comprises an exhaust fan, an exhaust outlet and a ventilation silencer; the air inlet channel is fixed on the inner side of the sound insulation plate of the side wall of the sound insulation cover, and the air inlet is positioned on the outer side; the air inlet channel and the air exhaust channel work in a mechanical ventilation mode and a mechanical air exhaust mode.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A low frequency noise baffle, comprising: the sound insulation structure layer is detachably spliced with the outer wall decoration layer, the sound insulation structure layer and the sound absorption structure layer in sequence, and the distances between the outer wall decoration layer, the sound insulation structure layer and the sound absorption structure layer and a noise source are gradually reduced; the sound insulation structure layer comprises a first galvanized sheet layer, a first damping sound insulation layer, a sound absorption cotton layer, a second damping sound insulation layer and a second galvanized sheet layer which are sequentially connected; the sound absorption structure layer comprises a honeycomb aluminum layer, a sound absorption material layer, a waterproof dustproof layer and a porous plate layer which are sequentially connected.
2. The low frequency noise insulation panel according to claim 1, wherein gaps between said first galvanized sheet layer, said first damping layer, said sound-absorbing cotton layer, said second damping layer and said second galvanized sheet layer are sealed by a sealant; the honeycomb aluminum layer, the sound absorbing material layer, the waterproof dustproof layer and the gap between the porous plate layers are sealed through the sealant.
3. The low frequency noise insulation panel according to claim 1, wherein said first galvanized sheet layer and said second galvanized sheet layer are both hot-dip galvanized materials.
4. A low frequency noise insulation panel according to claim 1, wherein said aluminum honeycomb layer is a honeycomb panel made of aluminum foil.
5. A low frequency noise insulation panel according to claim 1, wherein said first and second damping soundproof layers are both damping rubber material.
6. A low frequency noise insulation panel according to claim 1, wherein said sound absorbing cotton layer is made of a material comprising a polyurethane material and a polystyrene material.
7. A low-frequency noise insulation cover is characterized by comprising a noise insulation cover frame and a plurality of low-frequency noise insulation boards according to any one of claims 1 to 6, an air inlet channel, an air exhaust channel and a monitoring controller; the low-frequency noise insulation board is fixed on the sound insulation cover frame to form a hollow sound insulation cover, an air inlet channel is installed on the side wall of the sound insulation cover, and an air exhaust channel is installed at the top of the sound insulation cover; the monitoring controller is arranged on the inner wall of the wall body of the low-frequency noise insulation board, is electrically connected with the air exhaust channel and the air inlet channel, and is used for monitoring the working environment of the sound-proof cover and controlling the opening and closing of the air inlet channel and the air exhaust channel.
8. The low frequency noise sound insulation cover according to claim 7, further comprising a soundproof door, wherein the soundproof door comprises the low frequency noise sound insulation plate and a glass window embedded in the low frequency noise sound insulation plate, and the glass window has a double-layer glass structure and is hermetically connected with the low frequency noise sound insulation plate through a damping rubber strip.
9. The low-frequency noise sound insulation cover according to claim 7, wherein the monitoring controller specifically comprises an intelligent control terminal, an entrance guard unit, a temperature and humidity sensor, a smoke detector, a water immersion detector, a camera, an audible and visual alarm and an uninterruptible power supply, and the intelligent control terminal is respectively connected with the entrance guard unit, the temperature and humidity sensor, the smoke detector, the water immersion detector, the camera, the audible and visual alarm and the uninterruptible power supply.
10. The low-frequency noise sound insulation cover according to claim 7, wherein the air exhaust channel and the air intake channel have the same structure and are fixed with the low-frequency noise sound insulation plate, and the air exhaust channel specifically comprises an air exhaust port, a ventilation silencer and an exhaust fan; the exhaust outlet is communicated with the outside, and the exhaust fan is fixed on the low-frequency noise insulation board.
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| CN201920216676.2U CN210032167U (en) | 2019-02-20 | 2019-02-20 | Low-frequency noise insulation board and sound insulation cover |
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| CN201920216676.2U CN210032167U (en) | 2019-02-20 | 2019-02-20 | Low-frequency noise insulation board and sound insulation cover |
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| CN111962678A (en) * | 2020-09-08 | 2020-11-20 | 努鲁斯有限公司 | Sound insulation office easy to move |
| CN112542152A (en) * | 2020-11-26 | 2021-03-23 | 江苏大学 | Multilayer composite sound absorption structure with compact sound absorption material in middle layer |
| CN113112979A (en) * | 2021-04-16 | 2021-07-13 | 福建省中能泰丰节能环保科技有限公司 | Condenser sound insulation cover |
| CN113436598A (en) * | 2021-05-25 | 2021-09-24 | 中国神华能源股份有限公司国华电力分公司 | Sound insulation and noise reduction device for steam turbine set |
| WO2021231746A1 (en) * | 2020-05-13 | 2021-11-18 | V-T Industries Inc. | High performance acoustic door |
| CN113978610A (en) * | 2021-10-15 | 2022-01-28 | 江苏航运职业技术学院 | Sound absorption and insulation sheet for maintaining ecology of ship passenger cabin |
| CN114278127A (en) * | 2022-01-18 | 2022-04-05 | 湖州益环环保工程有限公司 | Double-deck syllable-dividing room |
| CN116756834A (en) * | 2023-08-07 | 2023-09-15 | 中国铁路设计集团有限公司 | Design and selection method for sound insulation window along rail transit line |
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| WO2021231746A1 (en) * | 2020-05-13 | 2021-11-18 | V-T Industries Inc. | High performance acoustic door |
| US11851942B2 (en) | 2020-05-13 | 2023-12-26 | V-T Industries Inc. | High performance acoustic door |
| CN111962678A (en) * | 2020-09-08 | 2020-11-20 | 努鲁斯有限公司 | Sound insulation office easy to move |
| CN112542152A (en) * | 2020-11-26 | 2021-03-23 | 江苏大学 | Multilayer composite sound absorption structure with compact sound absorption material in middle layer |
| CN113112979A (en) * | 2021-04-16 | 2021-07-13 | 福建省中能泰丰节能环保科技有限公司 | Condenser sound insulation cover |
| CN113112979B (en) * | 2021-04-16 | 2024-02-13 | 福建省中能泰丰节能环保科技有限公司 | Sound insulation cover of condenser |
| CN113436598A (en) * | 2021-05-25 | 2021-09-24 | 中国神华能源股份有限公司国华电力分公司 | Sound insulation and noise reduction device for steam turbine set |
| CN113978610A (en) * | 2021-10-15 | 2022-01-28 | 江苏航运职业技术学院 | Sound absorption and insulation sheet for maintaining ecology of ship passenger cabin |
| CN113978610B (en) * | 2021-10-15 | 2022-11-11 | 江苏航运职业技术学院 | Sound absorption and insulation sheet for maintaining ecology of ship passenger cabin |
| CN114278127A (en) * | 2022-01-18 | 2022-04-05 | 湖州益环环保工程有限公司 | Double-deck syllable-dividing room |
| CN116756834A (en) * | 2023-08-07 | 2023-09-15 | 中国铁路设计集团有限公司 | Design and selection method for sound insulation window along rail transit line |
| CN116756834B (en) * | 2023-08-07 | 2023-10-13 | 中国铁路设计集团有限公司 | Design and selection method for sound insulation window along rail transit line |
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