195 results about "Acoustical insulator" patented technology

The invention discloses a self-adaptive noise reduction method for a positive pressure type air respirator based on airflow spectrum characteristics, and relates to the technical field of positive pressure type air respirators.The self-adaptive noise reduction method comprises the steps that a respirator air path pressure signal and an environment noise signal are synchronously collected through an airflow sensor and a microphone array; performing time-frequency analysis on the collected signals, and extracting airflow spectrum features; and establishing a mapping relation between the working state of the breathing machine and the noise spectrum based on the historical record according to the mapping relation between the working state of the breathing machine and the noise spectrum. Through real-time acquisition and analysis of airflow frequency spectrum characteristics, accurate identification of useful airflow signals and environmental noise signals, dynamic adjustment of noise reduction parameters, effective suppression of high-frequency noise and low-frequency vibration, and improvement of noise reduction effect, compared with a traditional fixed frequency band filtering or passive sound insulation material, the method can better cope with a non-stationary noise environment, and has good application prospects. The noise reduction strategy is adjusted in real time, clear auditory information is provided in a complex noise environment, and therefore the auditory perception ability of firemen is improved.

The invention relates to the technical field of material analysis, and discloses an intelligent raw material composition screening method and system based on a sound insulation material, and the method comprises the steps: collecting acoustic characteristic test data, microstructure data and chemical composition data of a candidate sound insulation material; performing frequency response curve decomposition on the acoustic characteristic test data to obtain a characteristic frequency band sound absorption coefficient, and constructing an acoustic impedance tensor of the sound insulation material to analyze the sound wave dissipation performance of the candidate sound insulation material; calculating the pore distribution entropy and connectivity index of the candidate sound insulation material to analyze the sound wave propagation retardation efficiency of the candidate sound insulation material; analyzing the molecular chain flexibility and interfacial compatibility of the candidate sound insulation material to evaluate the acoustic performance stability of the candidate sound insulation material for multi-component compounding; and screening a target material from the candidate sound insulation materials by using sound wave dissipation performance, sound wave propagation retardation efficiency and acoustic performance stability. The performance matching degree of the raw materials screened out of the sound insulation material in actual composite use can be improved.

The invention relates to the related technical field of building sound insulation materials, in particular to a building heat preservation and sound insulation wall which comprises a building wall body, a vertical main keel, a transverse auxiliary keel and a sound insulation board, the vertical main keel is fixed to the building wall body, and the transverse auxiliary keel is fixedly connected to the vertical main keel; a plurality of transverse auxiliary keels are arranged between the adjacent vertical main keels at equal intervals, the sound insulation plate is positioned and fixed on the transverse auxiliary keels, the sound insulation plate comprises a bottom plate layer, a sound insulation layer and a panel layer, the inner side face of the sound insulation layer is fixedly connected with the bottom plate layer, and the outer side face of the sound insulation layer is fixedly connected with the panel layer; the building heat preservation and sound insulation wall is formed by combining the building wall body, the vertical main keels, the transverse auxiliary keels and the sound insulation plate, the sound insulation plate is formed by combining the bottom plate layer, the sound insulation layer and the face plate layer, the sound insulation groove is formed in the sound insulation layer, and the sound absorption cotton is filled in the sound insulation groove, so that the overall strength of the sound insulation plate is guaranteed, and meanwhile the sound insulation effect is improved. And the overall sound insulation and heat preservation effects of the sound insulation plate can be fully ensured.

The invention relates to the technical field of sound insulation materials, in particular to an automobile sound insulation pad and a preparation method thereof. An automobile sound insulation pad comprises a sound insulation layer and a sound absorption layer, and the sound insulation layer comprises 10-20 parts of first TPU particles, 10-20 parts of second TPU particles, 70-120 parts of filler, 1-2 parts of a coupling agent, 5-10 parts of a plasticizer, 2-5 parts of carbon black, 1-2 parts of an antioxidant and 1-2 parts of a lubricant; the density of the first TPU particles is 1.2-1.3 g / cm < 3 >, and the hardness is 50-60 SHD; the density of the second TPU particles is 1.2-1.3 g / cm < 3 >, and the hardness is 60-80 SHA; the sound absorption layer is a PU foaming layer. The PU is similar to the TPU in structure and can be directly foamed on the TPU, pretreatment steps such as flame treatment and plasma treatment are not needed, and the treatment process is simple. The obtained sound insulation pad is made of the same material (polyurethane) and can be integrally recycled, so that resource waste and environmental pollution are reduced.

The invention relates to the field of sound insulation materials, in particular to an environment-friendly automobile interior sound insulation material and a preparation method thereof. An environment-friendly automobile interior sound insulation material comprises a mass layer and a sound absorption layer, the mass layer is made of PET and PP composite non-woven fabric, and the weight of the mass layer is 1500-1700 g / m; the sound absorption layer is made of PET non-woven fabric, and the weight of the sound absorption layer is 400-500 g / m. The mass layer is made of PET and PP composite non-woven fabric, the weight reaches 1500-1700 g / m, and by means of the high surface density and composite structure, transmission of low and medium frequency noise of an engine, a road surface and the like can be effectively blocked; the sound absorption layer is a PET non-woven fabric of 400-500 g / m, the porous structure of the sound absorption layer can absorb medium-high frequency noise, and full-band sound insulation is achieved through combination of the quality layer and the sound absorption layer.

The invention relates to a method for preparing a gelling sound insulation material by foaming and mineralizing alkali-activated magnesium slag, and belongs to the technical field of resource utilization of industrial solid wastes. The preparation method comprises the following steps: mixing magnesium slag, water, an alkali activator, a functional activator, a foam stabilizer and a foaming agent to obtain homogeneous slurry, pouring, curing and forming, and demolding; and after demolding is finished, carrying out mineralization reaction to obtain the gelling sound insulation material. After alkali excitation and foaming treatment, the prepared gelling sound insulation material has certain strength and stability, the highest strength can reach 24.41 MPa, the sound insulation amount can reach 87.41 dB under the frequency of 6500 Hz, the sound absorption coefficient is 0.89, and excellent physical properties are shown. The method is simple in preparation process, mild in condition and easy to industrialize. According to the method, a new way, a new method and a new shortcut are discussed for fixing the carbon dioxide while the available way of the magnesium slag is expanded, and the purpose of treating waste with waste is achieved.

The invention discloses a sound insulation adhesive film and a preparation method and application thereof, and relates to the field of sound insulation materials. The sound insulation adhesive film comprises the following components in parts by weight: 90-100 parts of matrix resin; 23-30 parts of a plasticizer; 5-10 parts of a grafting agent; the grafting agent is selected from isocyanate uracil dimer; the mass content of hydroxyl in the matrix resin is 18-21% in percentage by weight, so that the vibration energy absorption capacity of the sound insulation adhesive film can be remarkably improved, the sound insulation effect is improved, and the impact resistance of the sound insulation adhesive film is improved.

The invention provides a high-strength sound-insulation fireproof composite board, and relates to the technical field of composite boards. The frame body is of an H-shaped structure, and aerogel is arranged at the two ends of the inner side of the frame body; the frame body is provided with the sound insulation plates, the sound insulation plates are symmetrically arranged at the two ends of the inner side of the frame body, noise sound waves penetrate through the fireproof plates and then are reflected and refracted multiple times in the spiral sound absorption holes, the sound wave propagation path is effectively disturbed, the efficient sound absorption characteristic of aerogel is matched, and a multi-stage attenuation mechanism for noise of different frequency bands such as high frequency and low frequency is formed. Compared with a traditional single-material sound insulation mode, the composite structure breaks through the bottleneck of sound insulation performance, can meet the noise reduction requirements in complex noise environments such as building decoration and industrial factory buildings, and solves the problems that a traditional board mostly depends on a single sound insulation material to achieve the noise reduction function, systematic acoustic structure design and the material synergistic effect are lacked, and the noise reduction effect is poor. The noise reduction requirements in complex noise environments such as high frequency, low frequency and the like are difficult to meet.

A fan acoustic casing system may include one or more casing sidewalls configured to at least partially define a cavity configured to receive the one or more fans. A casing sidewall may be configured to rotate between an open position or a closed position via a rotation mechanism, where one or more surfaces of the one or more casing sidewalls may be coupled to one or more acoustic insulation pads formed of one or more acoustic insulation materials to reduce vibrational noise. The system may include one or more sidewall fastening members configured to couple a casing sidewall to an additional casing sidewall. The system may include a mounting assembly including one or more mounting members configured to removably couple the fan casing assembly to a panel of a cabinet.

The utility model relates to the field of noise reduction equipment, specifically disclose a sound attenuation room of reducing noise, including a plurality of by the sound attenuation room main part of inner panel and outer panel, the sound attenuation room main part is connected each other through the connecting structure to form a casing with the cavity, the sound attenuation room main part adopts integrated structure, constitutes by the wallboard of Q235A material, ceiling and access door, and ceiling can be individually detached, the sound attenuation room is filled with fire -resistant sound attenuation cotton, and the fire -retardant sound attenuation cotton is cut even neat and tightly wrapped in the wallboard, the utility model provides a sound attenuation room of reducing noise, through the connecting design of optimization air duct and wallboard, reasonable layout equipment, adopt sound insulation material and set up sound attenuation device etc.

To provide a lightweight material exhibiting an excellent sound insulating effect.SOLUTION: A sound insulating material 1 comprising a resin composition 2 in which cellulose nanofibers 3 are dispersed is used.SELECTED DRAWING: Figure 1

The present invention relates to the field of building construction technology, specifically to a decorative panel for building decoration, comprising a base plate, a surface of the base plate provided with a sound insulation component, and a surface of the base plate provided with an assembly component; the beneficial effect is: the decorative panel for building decoration and the cutting equipment proposed by the present invention can facilitate workers to install multiple decorative panels with each other through the mutual cooperation between the base plate, protrusions, grooves, sound insulation sponge layer, first glue, fireproof layer, second glue, surface protection layer and other structures, so that they are pieced together into a whole, and can be in a parallel and stable state, reducing the probability of deviation between adjacent panels during installation, and at the same time can facilitate workers to carry out installation work without the need for workers to carefully carry out docking between the two, and at the same time use sound insulation materials to improve the sound insulation effect during use, avoiding affecting the normal rest of neighbors.

The utility model discloses a magnetorheological sound insulation cotton damping with anti -interference structure relates to sound insulation material technical field, including sound insulation cotton layer and anti -interference structure layer. The composite electromagnetic shielding layer of the magnetorheological sound insulation cotton damping with anti -interference structure outermost layer is alternately woven composite by nanometer copper net and graphene film, can be all -round shielding to electromagnetic interference, creates stable electromagnetic environment for the inside magnetorheological liquid filling cavity, effectively avoids the outside electromagnetic signal interference magnetorheological liquid response to the magnetic field, guarantees its rheological characteristic stable play, the three -dimensional shock attenuation layer of inner layer adopts the even arrangement of hexagonal honeycomb -like elastic rubber film and viscoelastic damping block, and is matched with interval distribution's shock attenuation spring and shock attenuation rubber block, can form multistage shock attenuation system, effectively absorbs and buffers mechanical vibration, greatly reduced the influence of outside vibration to sound insulation cotton layer and magnetorheological liquid filling cavity, has improved the reliability of product under complex vibration environment significantly.

This invention belongs to the field of building materials technology, specifically disclosing a sound-absorbing porous foamed concrete composite board and its preparation method. Using foamed concrete as the substrate of the composite board effectively solves the problem of poor environmental performance of traditional sound insulation materials. Compared with materials such as polystyrene and sound-absorbing rock wool, it does not require a large amount of energy for preparation and can utilize recycled raw materials. It does not produce toxic powder after aging, reducing harm to the air environment and human health, while also avoiding the flammability hazards of traditional materials. The closed-cell sound insulation layer's sealed pores can block direct sound wave penetration, achieving basic sound insulation. The sound-absorbing pores of the porous sound-absorbing layer, combined with the interconnected channels, introduce incident sound waves into the interior. Energy is dissipated through reflection and friction within the channels, forming a dual protection of "sound absorption and sound insulation." This solves the core problem of poor sound insulation performance of traditional concrete and compensates for the short lifespan of traditional sound insulation materials, extending the overall service life of the board.

The invention discloses a sound insulation and noise reduction decorative sheet, which comprises a soft marine phase structure and an island phase structure, wherein the soft marine phase structure takes 2-carbon, 3-carbon, 4-carbon and n-carbon elastomer / resin / rubber as a base material; the island phase structure takes natural or synthetic inorganic / organic filler or a mixture of the natural or synthetic inorganic / organic filler; the island phase structure filler is distributed and filled in the marine facies structure in different structural shapes, and a microstructure which reflects and absorbs sound waves for multiple times is formed between the island phase structure filler and the marine facies structure layer. The sound insulation coiled material has the beneficial effects that energy in noise is absorbed and converted into heat energy by utilizing the viscous damping effect of a soft high polymer material in the marine phase on sound waves, and the sound waves are reflected by a hard structure in the island phase, so that the noise is reflected and absorbed for multiple times in the micro island structure of the sound insulation coiled material, and the noise reduction effect is achieved; the problem that a traditional polyurethane sound insulation material needs to reach the thickness of 3-5 cm to achieve a good sound insulation effect is solved, and when the thickness is reduced to 2.5 mm, the good sound insulation effect can be achieved without causing space loss.

The invention provides a noise reduction air source heat pump which comprises a movable frame, an air source heat pump body and a sound insulation cover are arranged on the movable frame, the air source heat pump body is located in the sound insulation cover, the top of the air source heat pump body penetrates out of the sound insulation cover, first noise reduction holes are evenly formed in the inner side face of the sound insulation cover, and a sound insulation space is formed in the sound insulation cover. The sound insulation space is filled with sound insulation cotton. Compared with the prior art, the noise reduction device has the following beneficial effects that the semicircular sound insulation cover, the I-shaped sound inlet barrel and the combined noise reduction piece of the cross frame are arranged in the air inlet and outlet frame, and multiple times of refraction and attenuation of sound waves are achieved through the multiple layers of noise reduction holes, namely, the second noise reduction hole, the third noise reduction hole and the fourth noise reduction hole; the sound wave propagation path can be prolonged through the structure of the I-shaped sound inlet barrel, the sound wave energy is further segmented through the cross frame, multi-stage filtering of airflow noise and equipment operation noise is achieved in cooperation with the sound insulation material, the noise reduction effect of the air inlet and outlet channel is greatly improved, and finally the noise reduction function of the air source heat pump is achieved.

The present invention relates to a partition wall structure, which is used for partitioning steel structure building space. The partition wall structure comprises: a keel layer, the keel layer comprises a first keel and a second keel, the first keel is arranged parallel to one side of the second keel, a first filling layer and a second filling layer are arranged in the skeletons of the first keel and the second keel respectively, a first fireproof layer is arranged on the side of the first keel away from the second keel, and a second fireproof layer is arranged on the side of the second keel away from the first keel, and a steel structure component passes through and is connected to the first fireproof layer, the first keel, the second keel and the second fireproof layer. The keel layer comprises the first keel and the second keel arranged in a staggered manner, so that the sound insulation of the partition wall structure is enhanced, the filling layer can be filled with functional materials such as thermal insulation materials and sound insulation materials, so that the partition wall structure has functions such as thermal insulation and sound insulation, and the setting of the fireproof layer makes the partition wall structure have fireproof and flame retardant functions.

The utility model relates to the technical field of operating rooms, and in particular to a soundproof wall of a modular operating room, which solves the problem in the prior art that when filling the soundproof material, it is not convenient to extrude it thoroughly, which makes the density of the soundproof board insufficient, thereby greatly reducing the sound insulation effect. A soundproof wall of a modular operating room includes a frame, the inner side of the frame is slidably connected to an extrusion plate, and the top of the frame is detachably connected to a top plate, the four corners of the extrusion plate are provided with threaded rods, and the sides of the frame close to the four threaded rods are fixedly connected to side plates, and the threaded rods pass through the side plates through threaded grooves. The method proposed in the utility model, by rotating two threaded rods at the same time, through the rotational cooperation of the threaded rods and the threaded grooves, the extrusion plate extrude the soundproof material, so that the soundproof material is compacted, thereby making the soundproof material more compact, improving the sound insulation effect, and having high practicality.

The present application relates to sound insulation equipment technical field, more specifically, it relates to a kind of full-closed sound barrier based on building energy-saving sound insulation material board, comprising: building energy-saving sound insulation material board, door type steel frame structure and self-starting smoke outlet structure;Building energy-saving sound insulation material board is equipped with multiple, multiple building energy-saving sound insulation material board is respectively installed in the side and top of door type steel frame structure;Self-starting smoke outlet structure is closed and installed in the normally closed smoke outlet of door type steel frame structure;When the fire occurs in the full-closed sound barrier and produces a lot of smoke, self-starting smoke outlet structure removes the plugging of normally closed smoke outlet.The present application uses building energy-saving sound insulation material board and door type steel frame structure to cooperate as enclosure structure, effectively reduce traffic noise;Self-starting smoke outlet structure is also installed, effectively ensure the use safety under emergency state.

The invention discloses a door and window sound insulation curtain and belongs to the field of sound insulation materials. Butyl rubber sound insulation felts are connected to the upper side and the lower side of the sound insulation cotton, and the sides, away from the sound insulation cotton, of the butyl rubber sound insulation felts are connected with oxford cloth. Preferably, the sound insulation cotton, the butyl rubber sound insulation felt and the oxford fabric are sewn in a thread mode. Multiple materials are compounded to synergistically resist sound waves, and the sound insulation effect is better than that of a traditional product; and the material is easy to obtain, the cost is controllable, the volume production is easy, and the anti-layering anti-sticking fabric is suitable for families, offices, hospitals and other places, and the use cost is reduced.

The invention discloses a fabricated building energy-saving sound insulation material wall, and relates to the technical field of fabricated building walls. The wall comprises a wall body, a cavity is formed in the wall body, a damping device is arranged on the back face of the wall body, an assembling device is arranged at the bottom of the wall body, a foaming agent filling device is arranged on the right side of the wall body, and a dehumidification device is arranged on the front face of the wall body. Through the arrangement of the damping device, the side wall stabilizing rod, the sliding block, the stretching plate, the damping sleeve, the fixing block, the connecting rod and the hinged sliding block are matched with the attaching plate, and in the wall carrying process, the side wall stabilizing rod can balance the left stress and the right stress; and the stretching plate is driven by the damping sleeve to balance the stress applied left and right again, and the stress caused by external impact or vibration is dispersed and absorbed, so that the pressure borne by the wall body is reduced, the risk of structural damage is reduced, and the overall durability and safety of the wall body are improved.

A ceiling tile system capable of mitigating radio-frequency and acoustic waves from passing therethrough including a set of conductive grid bars; and a set of ceiling tiles each having a layer of conductive material and a layer of acoustic insulation.

A nozzle for an applicator by which a flowable viscous material suitable for forming a liquid applied sound deadener can be distributed, the nozzle comprising: a proximal end releasably coupled to the applicator and having an end side in which a single proximal opening is formed; a distal end opposing the proximal end and having an end side in which a single distal opening is formed; and an interior hollow chamber defined between the proximal end and the distal end and in fluid communication with both the proximal opening and the distal opening, the nozzle being configured such that when being distributed by the nozzle, the flowable viscous material can be supplied from the proximal end to the distal end and discharged out of the distal opening, and the distal opening has a straight edge and a sawtooth-shaped or sine-shaped or wave-shaped edge opposing the straight edge.

The invention relates to the technical field of wall sound insulation materials, in particular to a preparation method of a high-sound-absorption composite wall material which comprises the following raw materials in parts by weight: 50-60 parts of a base material, 20-30 parts of an additive, 10-15 parts of an adhesive, 8-10 parts of a flame retardant, 10-15 parts of deionized water, 10-12 parts of glass wool, 6-8 parts of rock wool and 6-8 parts of an additive solution. According to the invention, the calcined illite forms a porous structure, the interlayer spacing is enlarged, when sound waves enter tiny pores of the porous structure, air molecules vibrate at a high speed in a narrow channel, the speed of air molecules close to pore walls is reduced, friction between the molecules and friction between the molecules and the pore walls consume sound wave energy, and sound waves with different frequencies are matched; the carbon black particles fill gaps of rubber molecular chains, so that pore closing and molecular energy absorption caused by thermal expansion are avoided, sound wave transmission is blocked, the overall sound insulation index is improved, and the sound absorption performance of the material is remarkably improved.

To restrain noise of a compressor covered by a sound insulating member from leaking to the outside of the sound insulating member.SOLUTION: A heat source unit (20) comprises: a casing (70); devices (80) arranged in an internal space (S1) of the casing (70); and a sound insulating member (60) arranged in the internal space (S1), and covering the devices (80) so as to partition a housing space (61) housing the devices (80). The devices (80) include a compressor (30). Holes (62) are bored in the sound insulating member (60). Connection members (10) connected to the devices (80) are passed through the holes (62). An opening ratio (E) of cross-sectional areas other than portions blocked by the connection members (10) in the holes (62) to the total surface area of the sound insulating member (60) is 2.5% or less.SELECTED DRAWING: Figure 8

The present application relates to the measurement of mechanical vibration, and discloses a test bench and a test method for NVH of an air-conditioning compressor. The test bench is set up in a soundproof room, and the test bench includes: an isolation box, an air-conditioning compressor, a refrigerant high-pressure pipe, a refrigerant low-pressure pipe, a condenser, an evaporator, an electronic fan, and a blower. The inner wall of the isolation box is provided with sound insulation material and heat insulation material, and the isolation box is provided with a first through hole and a second through hole. The refrigerant high-pressure pipe passes through the first through hole, and the refrigerant low-pressure pipe passes through the second through hole. The condenser is connected to the air-conditioning compressor through the refrigerant high-pressure pipe, and the evaporator is connected to the air-conditioning compressor through the refrigerant low-pressure pipe. The electronic fan is installed on the condenser, and the blower is installed on the evaporator. The condenser, the evaporator, the electronic fan and the blower are all placed in the isolation box. The test method is applied to the test bench, and the test method may include: starting the air-conditioning compressor, the electronic fan and the blower, collecting sound data in the soundproof room and outside the isolation box, and analyzing the sound data.

The invention relates to a spacer device for a glazing unit, the spacer device comprising a straight profile (1, 10, 100) that comprises at least four walls (3, 4, 5) defining therebetween at least one chamber (2, 21, 22), the profile extending over a profile length, one (3) of the walls comprising a plurality of periodically arranged perforations (6). The chamber (2) comprises an acoustic insulation material (8) and, optionally, a desiccant (9). Any one (4, 5) of the walls not comprising the perforations has at least one longitudinal through-opening (40, 51, 52) which extends at least partially over the length of the profile (1, 10, 100), the at least one longitudinal through-opening (40, 51, 52) being hermetically sealed by a sealing closure element (20), fixed at least to the wall (4, 5) having the at least one longitudinal through-opening (40, 51, 52).