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39 results about "Architectural acoustics" patented technology
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Architectural acoustics (also known as room acoustics and building acoustics) is the science and engineering of achieving a good sound within a building and is a branch of acoustical engineering. The first application of modern scientific methods to architectural acoustics was carried out by Wallace Sabine in the Fogg Museum lecture room who then applied his new found knowledge to the design of Symphony Hall, Boston.
BIM (Building Information Modeling)-based stadium building acoustic construction method
The invention relates to a BIM (Building Information Modeling)-based stadium building acoustic construction method. The method comprises the following steps: step 1, carrying out BIM modeling; 2, using acoustic simulation and test software; 3, detecting and correcting the model; 4, a model meeting the requirement is formed; 5, establishing a three-dimensional coordinate system in the BIM model space; step 6, arranging sound source transmitting and receiving devices on site; 7, testing the sound source in different positions and scenes; and 8, stadium construction and equipment installation are carried out. It is ensured that the architectural acoustic quality of the venue is remarkably improved, and therefore the use requirements of people for high quality and high experience of different functions of the venue are met.
Owner:CHINA MCC20 GRP CORP LTD
Movable closed space detection device for testing sound insulation index of floor or wall
PendingCN120649705AAnalysing solids using sonic/ultrasonic/infrasonic wavesWallsArchitectural acousticsFloor slab
The invention discloses a movable closed space detection device for testing the sound insulation index of a floor or a wall, relates to the technical field of architectural acoustic testing, and has the advantages that the height and the length of a fence are adjusted, so that the adaptability of the fence in different rooms is improved. According to the key points of the technical scheme, the fence comprises fences which are mutually spliced on one side of a floor slab and one side of a wall body and form a closed space, and each fence comprises a mounting box with an upward opening and a vertical plate arranged at the upper end of the box wall, opposite to the mounting box, of the mounting box; the two vertical plates are distributed in the length direction of the mounting box, the length of the vertical plates is consistent with that of the mounting box, and extending pieces extending out in the length and height directions of the vertical plates are arranged in the mounting box and the two vertical plates.
Owner:GREEN CONSTRUCTION TESTING (NANJING) CO LTD
Midrange calibration device for a room
ActiveCN309728403SArchitectural acousticsRoom acoustics
1. The name of the design product: room low frequency calibration device. 2. The use of the design product: the design product is mainly used for the improvement and calibration of room acoustics in architectural acoustics, decoration. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: assembly state perspective view.
Owner:张永春 +3
Building sound insulation effect evaluation method and device
The invention relates to the technical field of building acoustic evaluation, in particular to a building sound insulation effect evaluation method and device, and the method comprises the steps: collecting a design drawing of a building and acoustic attribute parameters of used materials, building a three-dimensional geometric model based on a BIM technology according to the design drawing, and obtaining a sound insulation effect of the building according to the three-dimensional geometric model and the acoustic attribute parameters; constructing an initial architectural acoustic digital twinborn body; objective data and subjective quantitative data are synchronously collected in real time; comparing the real-time acquired data with the initial simulation data of the initial architectural acoustic digital twin and a preset standard spectrum library, and positioning a sound insulation weak point; feeding back the real-time acquired data to the initial architectural acoustic digital twinborn body, and calibrating the initial architectural acoustic digital twinborn body; and on the basis of the positioned sound insulation weak points, constructing a plurality of sound insulation optimization schemes in the calibrated architectural acoustic digital twin, and carrying out a virtual effect test to generate a comprehensive evaluation report. According to the invention, the sound insulation accuracy and efficiency can be improved.
Owner:HUNAN CONSTR ENG QUALITY TESTING CENT
Hot pressing-punching preparation process and device for electromagnetic protection
The invention discloses a hot-pressing-perforating preparation process and device for electromagnetic protection, and relates to the technical field of textile materials.The preparation method comprises the following steps that 5-10 g of graphene powder, 5-10 g of SiO2 powder and 50-100 g of polyurethane resin are weighed and placed in a dispersion machine, a dispersing agent, a flatting agent, a defoaming agent and a thickening agent are added at the same time, and the mixture is stirred to be uniform; stirring for 30 to 40 minutes to obtain a mixture with certain viscosity and flowability; and putting the pre-oxidized fiber felt into the prepared graphene / SiO2 / polyurethane, and carrying out two-dipping and two-rolling process treatment with the pick-up rate of 50-80%. Then, a hot press is adopted for carrying out hot pressing treatment on the padded pre-oxidized fiber felt for 30-70 min, the temperature is 120 DEG C, and the pressure is 5 Mpa. After hot pressing treatment, demolding operation is carried out; and a laser engraving machine is used for conducting perforation treatment on the material, the perforation diameter is 0.5-0.9 mm, the perforation rate is 8%-13%, and the graphene-based sound absorption material is obtained. The prepared sound absorption material is excellent in sound absorption performance, low in cost and good in environment friendliness, and can be widely applied to the fields of architectural acoustics, traffic sound insulation and the like.
Owner:TIANJIN SHENWEI FLEXIBLE PROTECTIVE MATERIAL TECHNOLOGY CO LTD
Building noise reduction and sound absorption part real-time monitoring method based on acoustic sensor
PendingCN121917660AAnalysing solids using sonic/ultrasonic/infrasonic wavesProcessing detected response signalSensor arraySound energy
The invention relates to the technical field of building acoustic environment monitoring, regulation and control, and discloses a real-time monitoring method for a building noise reduction and sound absorption part based on an acoustic sensor. According to the method, acoustic signals of a building target area are collected through a multi-channel acoustic sensor array, and a sound pressure level distribution map is generated; performing time-frequency domain decomposition on the atlas, separating low-frequency standing waves from high-frequency scattering components, and generating a sound energy absorption efficiency reference value by combining impedance characteristic parameters of a sound absorption component material; according to the reference value and a preset noise reduction target threshold value, dynamically dividing an acoustic sensitive area and marking the position of a sound absorption part needing to be optimized; based on the real-time sound pressure level change of the sensitive area, a nonlinear regression model is adopted to predict a performance attenuation curve of the sound absorption component, and an acoustic regulation and control parameter adjustment instruction is output; and the instruction is converted into the physical structure adjustment amount of the sound absorption component, and the monitoring frequency range of the sensor array is synchronously updated to adapt to the adjusted state. According to the method, dynamic linkage of monitoring and regulation is realized, and various building environment noise reduction requirements are met.
Owner:CHONGQING IND POLYTECHNIC COLLEGE
Wall clamping device for sound-absorbing cotton installation
Owner:WENZHOU XIAODAO SUPERFINE FIBER MATERIAL CO LTD
Long-channel building sound field modeling method and system based on sound infinitesimal body
The invention discloses a long-channel building sound field modeling method and system based on an acoustic infinitesimal body, and is applied to the field of architectural acoustics. Unified modeling of different types of sound sources in a building is realized by abstracting sound transmission into a transportation process of an infinitesimal body with energy. By designing a corresponding calculation framework, the transportation process of the sound infinitesimal body can be described microcosmically, and the dynamic change of the whole sound field in the building can be described in the macroscopic level. The framework comprises a sound source model used for describing sound infinitesimal body characteristics corresponding to a sound source; the space model is used for describing the size and wall surface conditions of the building space; the probability model accelerates calculation by designing a parallel calculation strategy to obtain the transmission and redistribution probability of the acoustic infinitesimal body; the acoustic dynamics algorithm is used for calculating dynamic evolution of a sound field in the building; and finally, outputting the distribution and dynamic change of the sound field in the building. The method is simple, effective, good in robustness and wide in application prospect.
Owner:ARMY ENG UNIV OF PLA
Acoustic environment quality optimization method and device, electronic equipment and storage medium
The invention provides an acoustic environment quality optimization method and device, electronic equipment and a storage medium, relates to the technical field of acoustic signal processing, and aims to determine an electroacoustic and sound reinforcement combined control strategy by calculating architectural acoustic parameters and taking balance of multi-element acoustic indexes as an optimization target. The method can adapt to the target buildings of different sizes and the dynamic change of the acoustic environment in the target building, and can carry out multi-target collaborative optimization according to the electroacoustic and sound reinforcement combined control strategy, thereby achieving the global optimal hearing experience, avoiding the strategy conflict between the electroacoustic equipment and the sound reinforcement equipment, and enabling the overall efficiency to be far beyond the sum of local optimization. Moreover, in the method, the building acoustic parameters are applied and are dominated, so that the optimization effect of the acoustic environment quality can be improved, and the optimization efficiency is improved. The method does not need to depend on subjective hearing and experience of technicians, but determines the electroacoustic and sound reinforcement combined control strategy in a target optimization mode, so that the labor cost can be reduced, and human errors cannot be introduced.
Owner:IFLYTEK CO LTD
A sound absorption and diffusion complex
This utility model discloses a sound absorption and diffusion complex, characterized by comprising an installation frame, a sound-absorbing soft pad, and a polyester sound-absorbing diffuser. The soft pad and the polyester sound-absorbing diffuser are respectively disposed within the installation frame. The areas of the soft pad and the polyester sound-absorbing diffuser can be adjusted according to functional requirements. Increasing the area of the soft pad increases the sound absorption coefficient of the product, while increasing the area of the polyester sound-absorbing diffuser decreases the sound absorption coefficient, thereby increasing the sound diffusion function. This utility model is lightweight, easy and quick to install, and simple to manufacture, process, maintain, and replace, making it suitable for architectural acoustics engineering and noise control engineering.
Owner:FOSHAN TIANGE ACOUSTIC & DECO MATERIAL CO LTD +2
A method and apparatus for evaluating sound insulation of a building
The application relates to the technical field of building acoustics evaluation, and particularly relates to a building sound insulation effect evaluation method and device, which comprises the following steps: collecting design drawings of a building and acoustic attribute parameters of used materials, building a three-dimensional geometric model based on BIM technology according to the design drawings, and constructing an initial building acoustic digital twin according to the three-dimensional geometric model and the acoustic attribute parameters; synchronously collecting objective data and subjective quantitative data in real time; comparing the real-time collected data with initial simulation data of the initial building acoustic digital twin and a preset standard frequency spectrum library, and positioning sound insulation weak points; feeding back the real-time collected data to the initial building acoustic digital twin, and calibrating the initial building acoustic digital twin; constructing multiple sound insulation optimization schemes in the calibrated building acoustic digital twin based on the positioned sound insulation weak points, and performing virtual effect testing to generate a comprehensive evaluation report. The application is helpful to improve sound insulation accuracy and efficiency.
Owner:HUNAN CONSTR ENG QUALITY TESTING CENT
Surface layer additional type sound insulation cocoon house and construction method thereof
PendingCN121897196AImprove barrier propertiesSolve the common problem of poor sound insulation effectCeilingsWallsFiberArchitectural acoustics
The invention provides a surface layer additional type sound insulation cocoon house and a construction method thereof, and belongs to the technical field of architectural acoustic transformation. The sound insulation cocoon house is defined by a ground floating construction layer, a wall damping construction layer and a top face elastic construction layer, and a six-face physical decoupling independent inner container space is constructed. A honeycomb particle damping module is adopted in the wall damping structure layer, the internal space is divided into micro units arranged in an array mode through a multi-stage honeycomb core framework, and the units are divided into an upper-stage sub-cavity and a lower-stage sub-cavity which are communicated through throttling necks. The sub-cavities are filled with composite damping particle groups composed of elastic polymer particles and rigid ceramic particles in a graded mode, and the surfaces of the sub-cavities are covered with micro-perforated skin plates. A non-linear particle damping mechanism is used for replacing traditional fiber viscous energy dissipation, energy can still be efficiently dissipated at the wall surface boundary with the weak sound wave particle speed, and the low and medium frequency sound insulation performance is remarkably improved; meanwhile, gravitational accumulation and hardening of particles are prevented through a graded bearing structure, and the long-term acoustic stability of the sound insulation cocoon house is ensured.
Owner:HUBEI SHIYU NEW BUILDING MATERIALS CO LTD
Acoustic material recommendation method and system based on indoor model
The invention relates to the technical field of architectural acoustic materials, in particular to an acoustic material recommendation method and system based on an indoor model, and the method comprises the steps: constructing a three-dimensional model according to an architectural plane graph, and carrying out the partitioning according to purposes to obtain a target region; adding a candidate acoustic material for the target area; determining the position of the sound source in the three-dimensional model; adding household articles with matched purposes to each target area according to user requirements; under the sound source sound production condition, multi-area sound field distribution is synchronously collected based on candidate acoustic material performance parameters; and screening adaptive acoustic materials from the candidate materials in combination with sound field distribution and acoustic requirements of each area. According to the invention, through scene modeling and data driving screening, the acoustic material is matched with the indoor scene, the function requirement and the personalized demand, the scientificity and the accuracy of material selection are improved, the functionality and the comfort degree of the indoor acoustic environment are guaranteed, and an efficient and feasible solution is provided for indoor sound field optimization.
Owner:HANGZHOU ELITE DIGITAL TECH CO LTD
Room low frequency calibrator
ActiveCN309866244SArchitectural acousticsRoom acoustics
1. The name of the design product: room low frequency calibrator. 2. The use of the design product: the design product is mainly used for the improvement and calibration of room acoustics in architectural acoustics, decoration. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.
Owner:张永春 +3
Recyclable architectural acoustic products and suspension thereof
A construction component having an acoustic damping component e.g. an architectural or decorative product such as ceiling hung fins or panels (Figs 27-45) or a grid structure of beams 10 (Figs. 2, 3),
Owner:AUTEX IND LTD
Acoustic time delay dispersion and calibration of a room
ActiveCN309665798SArchitectural acousticsRoom acoustics
1. The name of the design product: room sound delay diffusion and calibration device. 2. The use of the design product: the design product is mainly used for the improvement and calibration of room acoustics in architectural acoustics, decoration. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.
Owner:张永春 +3
Recyclable architectural acoustic products and suspension thereof
Disclosed is an acoustic architectural product that is fully recyclable without requiring dismantling or separation of its components. The product comprises an acoustic component and PET clips and / or connectors that engage with the PET component. The invention also includes a suspension system for supporting the product without additional bracing.
Owner:AUTEX IND LTD
SPC floor noise-proof structural acoustic performance evaluation method and system
ActiveCN120030647BGeometric CADDesign optimisation/simulationArchitectural acousticsEvaluation result
The present invention relates to the technical field of building acoustic performance evaluation, and in particular to a method and system for evaluating the noise-proof structural acoustic performance of an SPC floor. The method comprises: collecting the acoustic structural properties of the SPC floor, and establishing a plurality of structural acoustic evaluation factors according to the acoustic performance evaluation requirements of the SPC floor, respectively allocating acoustic response weights to the plurality of structural acoustic evaluation factors, and respectively allocating combined secondary weights to the plurality of structural acoustic evaluation factors according to the acoustic structural properties, and finally constructing an acoustic evaluation model. An evaluation result is output by combining the acoustic response weights with the combined secondary weights. The present invention effectively solves the problem of lacking a dynamic adjustment mechanism for evaluation weights in traditional acoustic evaluations, strengthens the continuity of responses to material and structural changes, reduces costs, and accurately predicts acoustic effects.
Owner:CHANGZHOU ZHENGHANG DECORATIVE MATERIALS CO LTD
Semi-perforated composite facing porous particle acoustic board and preparation method thereof
PendingCN121556647ALamination ancillary operationsCovering/liningsArchitectural acousticsMicroparticle
The invention discloses a semi-perforated composite facing porous particle acoustic board and a preparation method thereof, and belongs to the technical field of architectural acoustics and green decoration materials. The sound absorption plate is formed by compounding three layers of structures, namely a semi-perforated particle sound absorption base plate with non-perforated holes on one side, a bonding layer coated on a non-perforated area of the base plate, and a micro-perforated sound transmission facing layer attached to the bonding layer, the sound absorption plate is made of a PVC (polyvinyl chloride) wood grain film, a natural wood veneer or a flame-retardant fabric, and through micropores are formed in the surface of the sound absorption plate. Through the collaborative acoustic channel design of substrate semi-perforation and veneer micro-perforation, the excellent performance of high NRC value (larger than or equal to 0.70), A-level fire prevention, environmental protection, durability and the like of a particle acoustic board is reserved, meanwhile, the high-grade diversified decoration effects of wood grains, fabric and the like are achieved, the industrial problem that the sound absorption performance is seriously degraded due to traditional covering is thoroughly solved, and the sound absorption effect is improved. And the system is suitable for public and commercial spaces with high requirements on acoustics and aesthetics.
Owner:ZISEN ENVIRONMENTAL TECHNOLOGY CO LTD
Two-dimensional calibration device
ActiveCN309769448SArchitectural acousticsRoom acoustics
1. Name of the designed product: two-dimensional calibration device. 2. Use of the designed product: the designed product is mainly used for the device for improving and calibrating room acoustics in architectural acoustics, decoration. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.
Owner:张永春 +3
Micro-expansion hydrophobic foam concrete floor system based on ordinary Portland cement
The invention relates to the field of building acoustic functional materials, and discloses a micro-expansion hydrophobic foam concrete floor system based on ordinary Portland cement. The system comprises a structural layer, an FC interface agent layer, a micro-expansion hydrophobic foam concrete layer, an FC interface agent layer and a decoration layer from bottom to top. Ordinary Portland cement and slag powder are used as curing components, large-dosage gypsum is used as an expansion component, silica fume, a tackifier, a water repellent, a water reducing agent and other modified components are added, micro-expansion hydrophobic foam concrete is prepared in a physical foaming mode, and firm bonding between the foam concrete and a structural layer and between the foam concrete and a decoration layer is achieved through an FC interface agent. The closed tiny foam holes in the foam can effectively absorb and reflect sound waves and block noise transmission; and the low elastic modulus is beneficial to efficiently absorbing and dispersing impact energy and reducing the structural vibration response, so that good sound insulation and vibration reduction functions are achieved. The floor system has the characteristics of micro-expansion, no cracking and low water absorption rate, raw materials are inorganic materials, and the floor system is environment-friendly and durable and has remarkable popularization significance.
Owner:GUANGZHOU CHANGJU ENGINEERING TECHNOLOGY CO LTD +1
CLT building acoustic sprinkler drop flooring system
ActiveUS12716235B2Metal pourerArchitectural acoustics
A composite flooring system includes a cross-laminated timber (CLT) subfloor including a plurality of drop holes, a plurality of isolators disposed on top of and attached to the CLT subfloor, a sprinkler main of a sprinkler system disposed between the plurality of isolators, a plurality of sprinkler drops attached to the sprinkler main which extend through the drop holes of the CLT subfloor, a plurality of metal inverted tracks attached to a top surface of the plurality of isolators, and an upper flooring attached to a top surface of the metal inverted tracks.
Owner:UNITED STATES GYPSUM CO
Architectural acoustics optimizing device
The utility model discloses an architectural acoustics optimizing device which comprises a wallboard, a silencing inner core is arranged in the wallboard, silencing cotton is arranged in the middle of the silencing inner core, cellular boards are arranged on the two sides of the silencing cotton, the inner diameter of each cellular board is of a gradually-shrunk structure, and therefore a trumpet-shaped structure is formed. A silencing cavity is formed between the honeycomb plate and the silencing cotton, and a first connecting plate and a second connecting plate are arranged on the two sides of the wall plate correspondingly. The honeycomb plates are arranged on the two sides of the silencing cotton, the inner diameters of the honeycomb plates are gradually reduced, the honeycomb plates form the horn-shaped structure, the silencing cavity is formed between the honeycomb plates and the silencing cotton, the honeycomb plates of the horn-shaped structure are beneficial to guiding sound waves into the silencing cavity, and the sound waves are reflected and dissipated in the silencing cavity. And a sound attenuation cavity is formed between the honeycomb plate and the sound attenuation cotton, so that the propagation path and the dissipation space of sound waves are further increased, and the sound insulation effect is improved.
Owner:SUZHOU CIVIL ARCHITECTURAL DESIGN INST CO LTD
Building sound insulation performance evaluation method based on digital twinning
This invention relates to the field of architectural acoustics technology and discloses a method for evaluating the sound insulation performance of buildings based on digital twins. The method includes: collecting sound pressure and acceleration integrals to obtain the vibration velocity at the measuring point, and separating the direct reflected sound pressure by stripping the surface radiated sound pressure; subsequently, calculating the boundary energy reflection coefficient and retrieving the local equivalent density at the measuring point; calculating the dispersion bending wave velocity and spatial phase delay based on the equivalent density; combining the spatial attenuation weight and the phase delay cosine factor to perform phase compensation spatial interpolation on the dynamic vibration velocity of the twin node; finally, mapping the equivalent density to the twin node to recalculate the wave velocity, constructing a dynamic apparent acoustic impedance based on the vibration velocity extreme values, thereby obtaining the transmission coefficient and converting it into a comprehensive dynamic building sound insulation index.
Owner:INNER MONGOLIA DATANG INTL TUOKETUO NO 2 POWER GEN CO LTD
A microparticle 3D sound-absorbing decorative brick
This utility model discloses a microparticle 3D sound-absorbing decorative brick, characterized in that it includes a microparticle sound-absorbing body, which is provided with multiple layers of annular borders. The inner diameter of the multiple annular borders decreases sequentially from top to bottom, forming a stepped inner wall structure. This utility model simplifies the structure, reduces costs, and improves sound absorption performance, meeting the practical application needs of architectural acoustics engineering and noise control engineering.
Owner:FOSHAN TIANGE ACOUSTIC & DECO MATERIAL CO LTD +2
Multi-gradient micro-perforated plate low-frequency broadband sound absorption structure based on sound wave black hole effect
A multi-gradient micro-perforated plate low-frequency broadband sound absorption structure based on a sound wave black hole effect belongs to the field of low-frequency vibration and noise reduction, is integrally cylindrical and consists of N micro-perforated plates, N connecting plate sleeves and a base, the micro-perforated plates and the connecting plate sleeves are sequentially arranged from top to bottom, the micro-perforated plate is arranged on the topmost layer, the micro-perforated plates are connected through the connecting plate sleeves, and the micro-perforated plate on the lowermost layer is connected with the base through the connecting plate sleeve. The aperture, the perforation rate and the plate distance of the designed micro-perforated plate are gradually changed layer by layer from top to bottom, a multi-gradient structure is formed, the sound wave black hole effect is introduced, the sound wave propagation speed is gradually reduced, the path is prolonged, and step-by-step gathering and dissipation of sound energy are achieved in combination with viscous damping and resonance effects; the base is used for preventing sound energy leakage and enhancing low-frequency absorption; the invention has the advantages of wide sound absorption frequency band, excellent low and medium frequency absorption performance, compact structure, controllable parameters, easy processing and modular combination, and is suitable for the engineering fields of noise control, architectural acoustics and the like.
Owner:DALIAN UNIV OF TECH +1
Convenient detection method for floor impact sound
InactiveCN121253663AAnalysing solids using sonic/ultrasonic/infrasonic wavesProcessing detected response signalEnvironmental noiseFrequency spectrum
The invention discloses a convenient floor impact sound detection method, and relates to the technical field of architectural acoustic detection, and the method comprises the steps: 1, synchronously collecting a vibration acceleration signal and an environmental noise sound pressure signal of a to-be-detected floor; step 2, performing spectral analysis on the vibration acceleration signal and the environmental noise sound pressure signal, and calculating a vibration noise coefficient by identifying an overlapped interference frequency band to realize frequency-band correction of the vibration signal so as to obtain a pure vibration characteristic signal; step 3, comparing the sensitive frequency band energy proportion and the vibration attenuation time of the pure vibration characteristic signal with a preset proportion threshold value and a time threshold value to judge the sound insulation grade; meanwhile, the time window duration is adjusted according to noise fluctuation, and the anti-jamming capability to burst noise is improved; through targeted signal processing and dynamic interference suppression, the accuracy and adaptability of floor impact sound insulation performance detection in different noise environments are improved.
Owner:ANHUI RUILIAN ENERGY SAVING TECH CO LTD
Method for preparing building material noise reduction material by using automobile exhaust catalyst
The invention relates to a method for preparing a building material noise reduction material from an automobile exhaust catalyst, and relates to the technical field of waste resource utilization and building acoustic materials.The method comprises the following steps that a directional structure of a waste catalyst is reserved and pretreated; forming a molecular imprinting acoustic memory; an acoustic structure regulates and controls a crushing process; constructing a gradient interface transition layer; designing and preparing an acoustic structured material; electric field assisted directional forming; and performing multifunctional curing and microstructure optimization. According to the invention, the original porous structure of the catalyst is reserved and strengthened, a three-level pore structure is constructed and formed by adopting a differential crushing process and a gradient interface, and the microstructure is precisely regulated and controlled by utilizing electric field-assisted directional forming and supercritical CO2 post-treatment. The sound absorption coefficient of the prepared material in the low-frequency interval of 125-250 Hz reaches 0.5-0.6, the full-band sound absorption coefficient curve is in smooth transition and has no obvious valley value, and the performance attenuation does not exceed 5% after the material is used for 30 days under the high-humidity condition.
Owner:SHANGHAI XINJINQIAO ENVIRONMENTAL PROTECTION
Three-dimensional calibration device
ActiveCN309769449SArchitectural acousticsRoom acoustics
1. Name of the designed product: three-dimensional calibration device. 2. Use of the designed product: the designed product is mainly used for the device for improving and calibrating room acoustics in architectural acoustics and decoration. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.
Owner:张永春 +3
Double-cover damping wooden soundproof door preparation process and product thereof
The invention discloses a double-cover damping wooden soundproof door preparation process and a product thereof, and belongs to the technical field of architectural acoustics and wooden composites.The double-cover damping wooden soundproof door preparation process comprises the following steps that core material preparation is conducted, specifically, a door frame is made of laminated timber, and an I-shaped keel frame is arranged in the door frame; egg cotton sound insulation layers with different densities are sequentially filled at intervals of the keel frame from the center to the edge of the door body, and the densities of the egg cotton sound insulation layers are gradually increased; preparing a surface layer: sequentially bonding the panel layer, the first sound insulation sealant layer, the density board buffer layer and the second sound insulation sealant layer through a staged variable-pressure cold pressing process; surface treatment is conducted, specifically, paint coating is conducted on the panel layer; wear-resistant sound-insulation edge sealing cotton is installed on the upper side and the lower side of the door body. Through the combined design of the I-shaped keel frame and the egg cotton and the structure of the laminated wood door frame and the double sealing rubber layers, the insulation effect on low-frequency noise such as footstep sound is remarkably improved, and the problems that a traditional sound insulation door is prone to deformation and poor in sealing performance are solved.
Owner:DEHUA TB NEW DECORATION MATERIAL CO LTD