13 results about "Noise barrier" patented technology

An acoustic blanket absorbs acoustic energy and reduces noise in a launch vehicle. The acoustic blanket may be overlaid on a wall of a payload fairing of the launch vehicle. Materials and construction of the acoustic blanket allow for a relatively thin and light sound barrier. The acoustic blanket may comprise vertically-lapped polyester that is overlaid with a lightweight melamine foam. This combination of materials creates an acoustic impedance mismatch between layers that leads to absorption of acoustic energy across a relatively broad range of frequency bands. The acoustic blanket has a particular heat seal pattern that helps absorb noise while allowing the acoustic blanket to be relatively soft and flexible, which is useful for attaching the acoustic blanket to a curved wall of a fairing or other launch vehicle shapes. The acoustic blanket utilizes micro-perforations on multiple sides to allow for movement of air / venting while maintaining the bulk materials inside.

The utility model relates to the field of sound barrier installation especially detachable sound barrier pre -buried connecting sleeve, technical scheme: detachable sound barrier pre -buried connecting sleeve, including pre -buried base, pre -buried shell, anchor plate and pre -buried sleeve, the upper end center of pre -buried base is fixed with pre -buried screw rod, the outer wall of pre -buried shell is provided with thread layer, the outer wall of pre -buried shell is opened and is provided with two groups of first through -hole of left and right symmetry distribution, the utility model discloses through pre -buried shell and first through -hole can avoid the concrete of pouring the pre -buried sleeve and pre -buried screw rod fixed lock of thread connection to reduce the influence that concrete deck receives in the process of dismounting pre -buried sleeve, and the pre -buried base, pre -buried sleeve and anchor plate of thread connection of thread connection, then can be convenient for subsequent user to the convenience of maintaining sound barrier, solved the problem that the existing sound barrier pre -buried connecting sleeve is inconvenient to dismount when using, and can easily cause greater damage to concrete deck.

The application provides an optimal installation method and system of an active control noise reduction sound barrier, and belongs to the technical field of noise control.The active control noise reduction sound barrier comprises a source noise reduction module and a sound barrier, the method blocks the propagation path of a noise sound field through the sound barrier to form a sound shadow area, and the noise sound field is a primary sound field; the primary sound field is gathered at the top of the sound barrier to form a new diffraction sound source; the active noise reduction module is arranged at the top of the sound barrier to emit anti-sound to reduce the diffraction sound emitted by the diffraction sound source, and the area of the sound shadow area is enlarged to form an interference area; the enlarged sound shadow area and the formed interference area are superposed to form a noise reduction area after the noise reduction effect is superposed. The application overcomes the shortcomings of limited noise reduction effect of a traditional passive noise reduction measure on low-frequency noise and the insufficient low-frequency noise attenuation capacity of limited geometric size, so that the overall noise reduction performance of the sound barrier is improved.

This invention discloses a sound insulation device for an automatic aging chamber, relating to the technical field of sound insulation devices. The device includes a chamber with an inlet, an outlet, and an observation window. Sound insulation components include a sound insulation curtain, a transparent sound insulation panel, sound insulation cotton, and a sealing strip. The sound insulation curtain is located at the inlet and outlet, the transparent sound insulation panel is located at the observation window, and sound insulation cotton is installed on the inner wall of the chamber, excluding the observation window. Sealing strips are installed in the gaps within the chamber. The sound insulation curtains at the inlet and outlet form a dynamic sound barrier during product loading and unloading, effectively blocking noise leakage. The observation window reduces sound wave transmission while allowing operators to observe the testing process. The sound insulation cotton on the inner wall of the chamber absorbs and attenuates noise, further reducing noise energy. The sealing strip eliminates structural sound leakage channels, achieving a fully enclosed sound insulation seal, thus achieving efficient noise reduction throughout the entire aging test of audio products and reducing the noise intensity around the aging chamber.

The utility model discloses a kind of welding fume dust collectors of noise reduction, it is related to welding auxiliary equipment technical field, the welding fume dust collector includes dust collector box and the control box being arranged in the dust collector box one side, further include spark capture subassembly, dust removal subassembly, noise reduction subassembly and fan module.The utility model is through the three-stage spark interception structure of coarse mouth filter steel wire net, staggered V-shaped plate and fine mouth filter steel wire net, can efficiently block and cool high-temperature spark, cooperate infrared temperature sensor and the linkage mechanism of control box, can quickly respond when few spark breaks through interception, further block risk by speed reduction and airflow barrier, multiple protection effectively avoid spark ignition filter core, reduce security risk;The equipment is through the soundproof frame of double-layer sound insulation structure, centrifugal glass sound-absorbing cotton, rubber shock pad damping, etc., from noise barrier, absorption and damping, etc. Multidimensional reduction centrifugal fan operating noise, greatly reduce the noise volume of equipment.

This utility model relates to the field of prefabricated panel technology and discloses a composite thermal insulation and soundproof floor prefabricated panel, including a base layer made of crack-resistant mortar. Orthogonally distributed fiberglass mesh is laid within the base layer, and the fiberglass mesh is bonded to the base layer with cement mortar. Multiple second connecting plates are fixedly connected to the upper surface of the base layer. A functional layer, made of foamed cement composite board or graphite polystyrene board, is provided on the upper surface of the base layer. A protective layer, made of cement mortar, is provided on the outer wall of the functional layer. A corrugated sound insulation felt is embedded inside the functional layer. The foamed cement composite board or graphite polystyrene board of the functional layer provides high-efficiency thermal insulation performance. The corrugated sound insulation felt embedded inside increases the sound wave reflection path through its undulating structure. The 2-3mm thick sound insulation felt, combined with a 5-8mm wave peak height, can effectively absorb mid-to-high frequency noise of 125-4000Hz. The 200-300mm interval corrugated design allows the sound insulation felt to form a continuous sound barrier within the functional layer, reducing solid-borne sound transmission between floors.

The utility model discloses a sound insulation device of photovoltaic silica sand production ball mill, including support frame and sound insulation cover, support frame is detachable structure, including a plurality of support column and connecting plate, and the inner wall fixed mounting of connecting plate has guide rod, and the bottom of sound insulation cover is the opening, including outer steel sheet, intermediate sound insulation layer and inner sound insulation layer, and the four sides of sound insulation cover all are established with the guide slot of guide rod adaptation, and sound insulation cover is connected with support frame through guide rod, guide slot. In the utility model, the guide rod of connecting plate inner wall cooperates with the guide slot on sound insulation cover, makes the installation of sound insulation cover more convenient, can position and fix fast, and sound insulation cover is composed of outer steel sheet, intermediate sound insulation layer and inner sound insulation layer, forms multiple sound insulation barrier, effectively reduces the noise spread, and the connecting plate of support frame adopts polyester fiber sound absorption board, can preliminarily absorb the noise of ball mill, further strengthens the sound insulation effect of whole.

This invention relates to the field of sound barrier technology, and particularly to a sound barrier specifically designed for highways. It includes a mounting frame and a sound-insulating material body housed within the mounting frame. A rectangular plate with a circular hole is mounted on one side of the sound-insulating material body. A photosensitive sensor is mounted on the rectangular plate. A barrier mesh is mounted on one side of the rectangular plate. The four corners of the barrier mesh are connected to the interior of the mounting frame via springs. A horizontal plate is snapped onto the rectangular plate. The horizontal plate is equipped with a pressing component and a scraping component. A drive motor is mounted on the side of the horizontal plate inside the mounting frame. The horizontal plate is sleeved with a threaded rod on the drive motor. In this design, by setting an elastically vibrating barrier mesh on the outside of the sound-insulating material, and in conjunction with a pressing protrusion structure driven by the drive motor, a cleaning action can be automatically triggered when dust accumulation reaches a certain level.

This utility model discloses a train cab end door structure, including an end door frame. The multi-layer sealing assembly includes a rubber sealing strip on the side of the door panel. Two limiting grooves are provided on the top and bottom surfaces of the door panel. An airbag sealing ring is provided inside the limiting groove. One end of the airbag sealing ring is connected to an air inlet. This utility model, by setting up a multi-layer sealing assembly, uses the rubber sealing strip on the outermost side of the door panel as the first layer of sealing and sound insulation barrier. When the end door is closed, the airbag sealing ring can be directly connected to an external air source for inflation and expansion, effectively sealing the middle area between the door panel and the frame to form a tight air seal. Combined with the innermost flexible polymer sealing strip, this can further reduce noise and airflow infiltration when the door is closed, thereby improving the operational safety and comfort of the cab in the driving environment.

The utility model relates to the field of sound insulation wallboard, concretely relates to an environmental protection sound insulation wallboard structure, including board body, be used for supporting integral device, the board body left and right sides all are set up with mounting groove, connecting assembly is used for carrying out sound insulation to the connecting place of adjacent two groups of board body, sets up in the mounting groove inner wall, the connecting assembly includes the connecting convex stripe fixedly connected in the mounting groove middle part, the connecting convex stripe outside is connected with the plug -in piece through the insertion slot clamping, through the cooperation of connecting convex stripe, plug -in piece, sound insulation piece and main core etc. parts in connecting assembly, formed multilayer sound insulation structure, the outside of sound insulation piece is inclined plane and fits the mounting groove inner wall, can effectively block the sound through the connecting place of adjacent board body and spread, the plug -in piece of rubber material has certain elasticity and sealing property, can reduce the disclosure of sound, further enhanced the sound insulation barrier, significantly improved the sound insulation performance of the connecting place of board body.

The utility model discloses a low noise cooling tower's sound insulation cover, including sound insulation cover cover body, the upper end fixedly connected with sound insulation board of sound insulation cover cover body, the inside of sound insulation cover cover body is provided with ventilation mechanism, ventilation mechanism includes air inlet window and deflector, the bottom left side fixedly connected with umbrella -like bolt of deflector, the utility model relates to cooling tower technical field, the sound insulation cover of low noise cooling tower, can effectively reduce wideband noise through the setting sound insulation board, the surrounding acoustic environment is improved significantly, through setting air inlet window in the both sides of sound insulation cover cover body, the inside of sound insulation cover cover body is convenient for outside airflow to enter, forms the airflow circulation of inside and outside, has effectively enhanced the heat dissipation effect, through the inside installation of sound insulation cover cover body convenient to dismantle deflector, in the steady direction of sound insulation cover cover body inside airflow to form one side sound insulation barrier, further enhanced the sound insulation effect of sound insulation cover cover body.

The application discloses a construction site regional active noise reduction barrier system based on a sound wave dome, which comprises a barrier main body, a reference microphone array, a control system, an error microphone and a feedback control module. The barrier main body comprises a cage frame covered on a construction site, and a micro-perforated sound absorption board and a noise reduction interlayer are arranged on the inner side of the cage frame. The reference microphone array is used for collecting multi-channel sound pressure data and phase information in the construction site in real time. The control system is used for establishing a time-space model of internal noise based on the multi-channel sound pressure data and phase information collected by the reference microphone array, and performing a multi-channel adaptive control algorithm to calculate the driving phase and amplitude of each loudspeaker so that the loudspeaker array emits a superimposed sound field. The error microphone is used for collecting sound pressure data and phase information at a desired noise reduction position. The feedback control module is used for generating an error signal, and the error signal is fed back to the control system after delay compensation on a driving phase and amplitude compensation signal to adjust the phase and amplitude of the loudspeaker driving signal.

The application provides an energy-saving and environment-friendly highway sound insulation barrier, and relates to the technical field of sound insulation barriers.The highway sound insulation barrier comprises a frame body and a solar power generation device, and the solar power generation device is arranged on the frame body.The highway sound insulation barrier further comprises a sound insulation device, a lifting driving element and a hanging mechanism.The lifting driving element is arranged on the frame body, and the lifting driving element is connected with the hanging mechanism.The sound insulation device comprises a supporting plate, a first sound absorption plate and a locking mechanism.The first sound absorption plate is fixedly connected with the supporting plate, and the locking mechanism is arranged on the supporting plate.The hanging mechanism is detachably connected with the supporting plate, and the supporting plate can be fixedly connected with the frame body through the locking mechanism.A plurality of sound insulation devices are sequentially assembled on the frame body from top to bottom through the lifting driving element and the hanging mechanism.In the installation process, workers do not need to climb to the upper part of the frame body by means of ladders and other tools, so that the labor intensity of the workers is reduced, and the installation efficiency is improved.