1132 results about "Soundproofing" patented technology

A sound-dampening pad for a paddle used in a paddle sport that uses a ball, the pad including a cushion material disposed on a first side of the pad; an adhesive disposed on a second side of the pad configured to attach the pad the paddle; wherein the cushion material reduces the sound of the paddle striking the ball.

------ Acoustic Enclosure and Method for Leveling an Acoustic Enclosure The present invention relates to an acoustic enclosure (20) comprising a loudspeaker (21) mounted flush on a front face of the enclosure (20), characterized in that at least one Helmholtz resonator (26) is formed on the front face of the enclosure (20) between each lateral edge of the front face and the loudspeaker (21), the at least one Helmholtz resonator (26) being dimensioned to have a band gap to block the propagation, in the plane of the front face of the enclosure (20), of acoustic waves in the useful frequency band of the loudspeaker (21). Figure to be published with the abstract: Figure 6a

The utility model discloses an indoor tire road noise testing device, which comprises a sound insulation box body, a slope table, a tire driving system and a noise acquisition system, the sound insulation box body is of a closed structure. The slope table is arranged in the sound insulation box body, the slope table is provided with a slope adjusting device, the slope adjusting device is used for adjusting the slope angle of the slope table, and the slope of the slope table is used for placing a pavement test piece; the tire driving system comprises a driving assembly and a tire fixer, the tire fixer is rotatably mounted at the output end of the driving assembly, the tire fixer is arranged in the sound insulation box body and is used for mounting a test tire, and the driving assembly is used for driving the tire fixer to move to drive the test tire to impact the pavement test piece; the noise acquisition system is used for acquiring sound data in the sound insulation box body. The slope table is used for simulating the actual road surface condition, the noise condition of the designed road surface can be tested in the design stage, the actual effect is effectively guaranteed, and the problem that low-noise road surface design is difficult to verify in the design stage is solved.

An apparatus and methods are provided for a quiet pickleball. The quiet pickleball includes a spherical body comprising a sound dampening layer surrounding an inner plastic layer. Holes extend through the spherical body into a hollow interior. The sound dampening layer reduces the noise exhibited when the pickleball is hit with a paddle. The sound dampening layer can be attached to the exterior of a plastic pickleball or can be co-molded or injection molded during forming the pickleball. In one embodiment, the sound dampening layer is a felt pad adhesively attached to the exterior of the pickleball. A die enables cutting the felt pad to a shape that enables covering the exterior of the pickleball. An indexing jig enables attaching the felt pad to the pickleball such that holes in the felt pad are aligned with holes in the pickleball.

A vehicle-mounted external microphone detection device comprises a sound insulation cabin. Mounting frames are oppositely arranged on two sides in the sound insulation cabin; first rails are arranged at the tops of the two mounting frames; a second rail is slidably connected between the two first rails; a first motor for driving the second rail to slide on the first rail is arranged on one side of the mounting frame; a third rail is slidably arranged on the second rail; a second motor is arranged at one end of the second rail to drive the third rail to slide on the second rail; a turntable is slidably arranged on the third track; a third motor is arranged at the upper end of the third rail to drive the turntable to slide on the third rail; a loudspeaker is arranged on the lower side of the turntable; a fan is arranged at the top of the soundproof cabin; an air outlet of the fan is connected with a plurality of air pipes extending to the position, opposite to the mounting frame, in the sound insulation cabin; a plurality of air outlets are formed in the air pipe opposite to the mounting rack. According to the invention, the position of the loudspeaker is randomly adjusted through three-axis movement, so that the accurate control of the sound production position of the sound source and the simulation of any real scene position are realized.

The invention discloses an assembly type efficient sound insulation cover convenient to install, and relates to the technical field of sound insulation covers. Comprising a plurality of pieces of main body square steel, the main body square steel are linearly and evenly distributed at equal intervals, jacking mechanisms used for improving the bottom supporting strength are arranged on the inner walls of the main body square steel correspondingly, and assembly type connecting mechanisms used for improving the connecting strength and stability are installed in the main body square steel correspondingly; according to the assembly type efficient sound insulation cover convenient to install, main body square steel is inserted and limited in a penetrating and inserting mode through the assembly type connecting mechanism, the defect that limiting performance is insufficient due to the fact that a lap joint mode is directly used in a traditional structure is overcome, the whole assembly process is simpler and more convenient, rubber pads and expansion water stop strips are arranged at splicing joints, and the assembly efficiency is improved. The vibration transmission of equipment can be blocked, the inherent frequency is kept away from the vibration frequency of the equipment, secondary noise caused by resonance is avoided, meanwhile, through gaps are reduced, the noise is prevented from leaking from the insertion hole position, and the problem of noise leakage is solved.

A cornhole board device includes a pair of cornhole boards which each has an aperture extending through a respective cornhole board to facilitate a cornhole bag to pass through the aperture when the cornhole bag is tossed onto the respective cornhole board. A pair of sets of sound insulating layers is each applied to a respective one of the plurality of cornhole boards. Each of the sets of sound insulating layers is comprised of a resiliently compressible material to reduce the intensity of sound produced by a cornhole bag is tossed onto the respective cornhole board. A pair of rigid panels is each positioned on top of a respective one of the pair of sets of sound insulating layers to absorb impact energy of the cornhole bags when the pair of cornhole bags is tossed onto the cornhole boards.

A door assembly provides EMC shielding to provide EMI / RFI protection. The door assembly has an EMC door frame, an EMC door, and EMC seals for maintaining a circuit between the door frame, the floor (e.g., threshold, flooring, etc.), and / or the door. The door assembly may also utilize one or more EMC elements (e.g., EMC tape, paint, adhesive, coatings, caulk, etc.) that may be used to create the circuits between the components of the door assembly and / or with other components of the building (e.g., between the door frame and the wall). The EMC shielding is used to reduce (e.g., limit, block, etc.) the levels of electrogenic interference (EMI) / radio frequency interference (RFI) radiation that is able to pass by the shielding. Moreover, the door assembly also provides improve additional door assembly performance (e.g., sound, weather, air flow, heat, cold, or the like abatement, energy harvesting, or other performance benefits).

Assemblies, apparatuses, and methods to extract or convey a material from a source of the material may include a vacuum generation and sound attenuation assembly. The vacuum generation and sound attenuation assembly may include a compressor housing having a vacuum source, a cooling system, and a vacuum controller. The vacuum source may include a compressor powered by an electric motor and positioned to cause a vacuum flow between the source of the material, and the vacuum generation and sound attenuation assembly. The vacuum generation and sound attenuation assembly may further include a sound attenuation chamber positioned to receive at least a portion of the vacuum flow from, and attenuate sound generated by, the vacuum source. The compressor housing and sound attenuation chamber of the vacuum generation and sound attenuation assembly may be arranged compactly on a common chassis for ease of transport and deployment.

An earplug for blocking sound and method of making the same, which includes a planar insert within an earplug of compressible slow recovery foam. A method of attenuating sound by inserting the earplug at an ear canal entry so that the planar insert is tactilely vertical, and pushing the earplug into the ear canal allowing the earplug to flex perpendicular to plana surfaces of the planar insert.

A communications headset includes one or more directional speakers mounted in left and right temple housings positioned near a wearer's ears, with acoustic channels within the temple housings configured to direct sound waves toward the ear canals. The temple housings form an open-ear configuration, allowing external noises to reach the ears unobstructed. Each directional speaker is acoustically coupled to a contoured channel that delivers focused audio to the wearer's ear with minimal sound wave leakage. An in-ear speaker, magnetically secured and tethered to the temple housing, provides optional noise-isolated listening. A user-controlled selection switch allows a wearer to toggle between open-ear and in-ear modes. The headset also includes a boom microphone, volume controls, and USB charging and communication ports.

The invention belongs to the technical field of high-molecular polymers and functional coatings, and particularly relates to a water-based high-molecular composite sound-absorbing and sound-insulating coating and a preparation method thereof. The composite sound-absorbing and sound-insulating coating comprises the following components in parts by weight: 20-40 parts of silicone acrylic emulsion; 15-30 parts of a porous sound-absorbing filler; 20-40 parts of a high-density sound insulation filler; 5 to 10 parts of cross-linked acrylate coated butyl rubber core-shell emulsion; 1-8 parts of a functional auxiliary agent; and 10 to 25 parts of deionized water. Through cooperative use of the porous sound-absorbing filler, the high-density sound-insulating filler and the butyl rubber elastic damping material, the sound-absorbing coefficient and the sound-insulating amount of the coating can be synergistically improved. Core-shell coating treatment is carried out on butyl rubber through cross-linked acrylate, the adhesive force, flexibility and alkali resistance of the coating can be remarkably improved, and meanwhile the acoustic performance of the coating is also improved.

The invention discloses an audio signal measurement method and device, an electronic device and a storage medium, and relates to the field of audio signal measurement, and the method comprises the steps: deploying a detection microphone nearby a tested device, and arranging a reference microphone in a noise field, so as to synchronously collect a mixed signal containing a test signal and noise, and a pure ambient noise reference signal. After the noise of the two signals is subjected to correlation evaluation and the consistency of noise sources is confirmed, dynamically changing noise components are accurately stripped from the signals of the tested equipment by utilizing real-time noise data acquired by the reference microphone and through an adaptive noise cancellation algorithm, so that pure test signals are restored. Therefore, the problem of non-stationary noise pollution is solved through an active signal processing means instead of depending on imperfect physical sound insulation, and accurate and efficient measurement of the performance of the microphone in a noisy environment is realized.

This invention discloses a sound-insulating PVB film and its preparation method, belonging to the field of PVB film technology. It includes a first PVB film layer, a second PVB film layer, and a sound-insulating layer disposed between the first and second PVB film layers. The sound-insulating layer comprises TPU and TPEE. The PVB resins in the first and second PVB film layers have different hydroxyl values. The different hydroxyl values ​​of the PVB resins in the two film layers enhance adhesion, while also providing better flowability and easier film formation. The sound-insulating layer, made from a mixture of TPU and TPEE, improves weather resistance and impact resistance. The PVB film layer and the sound-insulating layer enhance sound insulation performance through complementary effects. The PVB film layer primarily insulates sound by absorbing sound wave energy and providing damping, while the sound-insulating layer absorbs sound wave energy primarily through its material properties. The combination of the two not only enhances the damping effect on sound waves but also reduces resonance, further enhancing sound insulation performance.

A grommet includes an umbrella-shaped member that is separate from a grommet body. The umbrella-shaped member has a covering portion that covers an insertion hole of a sound insulator provided on one surface of a vehicle body panel. The covering portion is inclined to increase in diameter toward the sound insulator. The grommet body has an engagement portion that axially locks to a front end of the covering portion, which is the front end of the umbrella-shaped member.

The invention discloses a PVB film with a sound insulation function and a preparation method thereof, and belongs to the technical field of PVB films. Comprising a first PVB film layer, a second PVB film layer and a sound insulation layer arranged between the first PVB film layer and the second PVB film layer. The sound insulation layer comprises TPU and TPEE; pVB resin hydroxyl values in the first PVB film layer and the second PVB film layer are different. The PVB resin hydroxyl values in the two film layers are different, so that the adhesive property can be enhanced, and meanwhile, the film has better flowability and is easier to form a film. The sound insulation layer is prepared by mixing TPU and TPEE, so that the weather resistance and the impact resistance can be improved; the PVB film layer and the sound insulation layer enhance the sound insulation performance through a complementary effect, the PVB film layer mainly absorbs sound wave energy and provides a damping effect to insulate sound, the sound insulation layer mainly absorbs the sound wave energy through the characteristics of the material, and the combination of the PVB film layer and the sound insulation layer can enhance the damping effect on sound waves and reduce the resonance phenomenon; the sound insulation performance is further enhanced.

A head-mountable frame includes a frame body configured with an arcuate shape, and a pair of ear shells connected to both ends of the frame body, respectively. Each of the ear shells is provided with a receiving cavity for installing an earpiece module. The head-mountable frame includes an earmuff assembly provided on the inner side of each ear shell and configured to fit closely to an ear, thereby forming a closed sound transmission cavity between the earpiece module and the ear. The receiving cavity of the ear shell is configured to receive the earpiece module through press-in fit removably. A head-mountable Bluetooth headphone includes the head-mountable frame and a Bluetooth headphone module which can be removably mounted in the receiving cavity through a press-in fit. A helmet includes a helmet body and a Bluetooth headphone module which can be removably mounted in the helmet body.

The invention relates to a focusing type voiceprint acquisition sensor, and discloses a sensor which realizes accurate focusing of equipment operation sound, reduction of environmental noise interference, improvement of sound signal quality, multi-dimensional voiceprint feature extraction and convenience for subsequent equipment operation state analysis through cooperation of an array type multi-direction sound acquisition module and a focusing concave mirror. The device is characterized in that the device is composed of a sound insulation cover, a sound collection hole, a voiceprint collection cylinder, a multi-angle voiceprint collection cylinder, a connecting rod, a sound collection module, a voice processing module and a focusing concave mirror, one end of the voiceprint collection cylinder is arranged on the multi-angle voiceprint collection cylinder and communicates with the multi-angle voiceprint collection cylinder, and the other end of the voiceprint collection cylinder is of an opening structure; the sound insulation cover is arranged at the other end of the voiceprint collection cylinder, sound collection holes which are densely arranged are formed in the sound insulation cover, the sound collection holes are tiny holes, the sound collection holes are close to the upper edge of the sound insulation cover, and the focusing concave mirror is arranged in the voiceprint collection cylinder and corresponds to the sound collection holes.

A sound conditioning device. The device includes a shield comprising an elongated plate having a front face and a rear face. A fastener is coupled to the rear face of the shield, where the fastener is adapted to detachably couple to a boom of a headset having a voice microphone. A sound conditioning material is coupled to the rear face, wherein the conditioning material overlays the voice microphone to encapsulate the voice microphone and suppress ambient sound detected by the microphone.

The invention discloses an urban road dynamic noise traceability evaluation method and system based on digital twinning, and the method comprises the steps: cooperatively collecting noise and road vibration signals through a non-uniform sound pressure sensor array and a vibration sensor, and dynamically compensating sound wave attenuation in combination with environment parameters; voiceprint features are extracted through wavelet packet decomposition, and dynamic parameters such as digital twinborn associated traffic flow and architectural acoustic reflection are constructed; improving a time difference positioning algorithm and fusing vibration spectrum verification to suppress environmental reflection noise; in the digital twin model, sound field distribution is predicted through sound ray tracking, health risks are evaluated based on a frequency band weighting model, and a parameterized sound insulation screen design and traffic flow regulation and control strategy is generated. The system integrates a multi-source sensing module, a digital twin engine module and an anti-interference positioning and decision optimization module, and realizes full-flow intelligentization of noise signal acquisition, feature fusion modeling, anti-interference positioning and treatment scheme generation.

The assembly type integrally-formed broken bridge energy-saving sound-insulation keel comprises a first plate body and a second plate body located on the right side of the first plate body, the first plate body and the second plate body define a first cavity and a second cavity respectively, the first cavity and the second cavity are each provided with an opening in one side, and a connecting plate body is arranged between the first plate body and the second plate body. An injection molding cavity is defined by the first plate body, the second plate body and the connecting plate body, and an injection molding connecting piece is arranged in the injection molding cavity; rigid connection of the metal keel is broken through the injection molding connecting piece, conduction of a sound bridge and a cold and hot bridge is broken, the sound insulation and energy saving performance of a wall is improved, secondary assembly for a broken bridge is not needed, construction procedures and labor and machine cost are reduced, and the construction efficiency is improved. A three-cavity structure is formed on the whole, multi-layer reflection, absorption and reduction of sound waves are facilitated, the efficient sound insulation effect and the energy-saving performance are further achieved, in addition, the types of components are reduced, the production efficiency and the installation efficiency of the sectional material are improved, and loss is reduced.

The utility model discloses a sound insulation door bottom sealer which comprises a bottom cover plate, and a sectional material is installed in the bottom cover plate and used for installing a sealing piece. Eight sealing strips are arranged on the sealing pieces, seven labyrinth sealing cavities are formed by the eight sealing strips on the sealing pieces, the multiple sealing pieces extend to the outer side of the bottom cover plate from the sectional material, and when the bottom cover plate moves downwards to be attached to the ground, the sealing pieces are extruded by the ground to deform, and the sealing effect is achieved. The deformation degrees of the multiple sealing strips in contact with the doorsill stone are different, it is ensured that the sealing strips are tightly attached to the doorsill stone so as to prevent sound transmission, the sealing and sound insulation effects are better, the sealing and sound insulation structure is particularly suitable for being installed at the position where a lower doorsill cannot be arranged, and the graphite pad is used for enabling vertical movement between the sectional material and the bottom cover plate to be smoother and more stable due to the small friction coefficient; the service life is prolonged, and the mute effect can be achieved; the section bar and the bottom cover plate are connected and fixed through a spring piece and a screw, and the section bar can be conveniently detached from the bottom cover plate.

The invention discloses a sound insulation and noise reduction water supply and drainage pipeline, and belongs to the technical field of water supply and drainage pipelines, the sound insulation and noise reduction water supply and drainage pipeline comprises a pipeline body and a connecting mechanism, the pipeline body comprises an outer pipe body, an inner pipe body, a supporting ring and a sealing ring, and an exhaust mechanism is arranged at the top of the outer pipe body and comprises an exhaust pipe, a sealing cover and a one-way valve; the two ends of the outer side of the outer pipe body are fixedly sleeved with fixing rings. The connecting mechanism comprises a front connecting base, a rear connecting base, a connecting frame, a fixing frame and a plug pin. The interlayer space between the inner pipe body and the outer pipe body is vacuumized and reliably sealed, the transmission path of sound in the structure is effectively cut off, outward transmission of noise generated by water flow in the pipe and vibration of the pipe is remarkably blocked in the vacuum state, and the overall sound insulation performance is greatly improved; the core measure is supplemented with the design of the supporting ring and the elastic sealing ring, vibration buffering is provided at a key connecting point, energy is absorbed and dissipated, and excellent environmental noise control is comprehensively achieved.

The present invention addresses the problem of providing a sound insulating structure which provides a sufficient sound insulating effect even when an adhesive layer is arranged therein, and in which a shift in the frequency band where the sound insulating effect is generated is unlikely to occur. This sound insulating structure includes, at least: a sound insulating member that includes a sheet-like sheet section and plural projections arranged on the sheet section; and an adhesive layer arranged on a surface of the sheet section on the opposite side of the side provided with the projections, and the sound insulating structure satisfies the following Formula (1): E_glue / I_glue>0.5×(E_membrane / H) (1) (wherein, E_glue (MPa): storage modulus of adhesive layer, I_glue (mm): average thickness of adhesive layer, E_membrane (MPa): storage modulus of sheet section and projections, and H (mm): average height of sheet section and projections).

The invention relates to the field of sound insulation cotton, in particular to flame-retardant sound insulation cotton and a preparation method thereof. The flame-retardant sound insulation cotton is prepared from the following raw materials in parts by mass: 50 to 80 parts of polyether polyurethane, 10 to 20 parts of acrylic fiber, 1 to 5 parts of [3-(trimethoxysilyl) propyl] succinic anhydride, 5 to 15 parts of modified expanded vermiculite, 3 to 8 parts of binder, 2 to 5 parts of foaming agent, 0.5 to 3 parts of curing agent, 0.1 to 1 part of antioxidant and 0.1 to 0.5 part of initiator. According to the flame-retardant sound-insulation cotton, the sound insulation effect of the flame-retardant sound-insulation cotton is remarkably improved through multiple mechanisms of enhancing the damping performance of the material, improving reflection and scattering of sound waves, optimizing the porous structure, improving the mechanical property and stability, reducing the propagation speed of the sound waves and the like, and meanwhile the flame-retardant sound-insulation cotton has the excellent flame-retardant performance.

The invention relates to a manufacturing method of a high-heat-insulation and sound-insulation type PVB (Polyvinyl Butyral) intermediate film for an automobile large skylight, and belongs to the technical field of laminated glass material preparation. A common PVB resin layer A, a high-damping-coefficient sound-insulation resin layer B, a heat-insulation composite resin layer C, a high-damping-coefficient sound-insulation resin layer B and a common PVB resin layer A are prepared into the high-heat-insulation sound-insulation type PVB intermediate film in sequence by adopting a five-layer composite co-extrusion process, a multi-layer structure is adopted, and particularly, the high-damping-coefficient sound-insulation resin layer B is used, so that the propagation of sound waves can be effectively reduced, and the sound-insulation performance of the PVB intermediate film is improved. The large skylight of the automobile can effectively isolate external noise and improve the riding comfort in the automobile during high-speed driving or urban traffic, vanadium dioxide and graphene are compounded through the C-layer heat insulation composite resin, graphene has a large specific surface area, the dispersity of vanadium dioxide can be improved, and the heat insulation performance of the automobile is improved. Vanadium dioxide can improve the reflectivity of near-infrared light when the environment temperature rises.

The invention relates to a fabric friction sound testing device which comprises a noise reduction box, an auxiliary friction table, an objective table, a weight increasing weight, a drafting device and a traction rope. One side of the noise reduction box extends outwards to form a noise elimination channel; the auxiliary friction table is fixed to the inner bottom of the noise reduction box. The objective table is placed on the auxiliary friction table; the weight increasing weight is used for being placed in the objective table. The drafting device is arranged outside the noise reduction box; the traction rope penetrates through the silencing channel, one end of the traction rope is connected with the objective table, and the other end of the traction rope is connected with the drafting device; and the sound acquisition device is fixed in the noise reduction box. The traction device is arranged outside the noise reduction box, the bottom noise can be effectively reduced fundamentally, the accuracy of a test result is improved, one side of the noise reduction box extends outwards to form the noise elimination channel, the traction rope penetrates through the noise elimination channel, and the noise elimination channel is arranged, so that the noise reduction effect is improved. The noise reduction box can effectively reduce the influence of holes formed in the path of the traction rope on the noise reduction box on the sound insulation effect, avoids external noise interference, and ensures the accuracy of a test result.

A duct includes a duct body. The duct body defines an inlet, an outlet, and a channel connecting the inlet and the outlet. The duct body is configured to direct gas flowing within the channel from the inlet to the outlet. The duct body further defines an opening located between the inlet and the outlet. The duct also includes a noise attenuator. The noise attenuator includes sound-absorbing material covering the opening. The sound-absorbing material has an outer face in direct contact with an external environment of the duct body. The sound-absorbing material is configured to dissipate acoustic energy within the channel.

The utility model discloses a structure-enhanced mute miniature speed-reducing planetary gear box which comprises a box body, a planetary gear ring and a planetary gear assembly. An accommodating cavity is formed in the box body; the planetary gear ring is fixed in the containing cavity, and the planetary gear ring and the planetary gear rotate in a meshed mode to drive the support shaft to rotate; an isolation cavity is formed between the outer wall of the planetary gear ring and the inner wall of the containing cavity, the purpose of forming the isolation cavity through the double-layer structure is to isolate sound from being transmitted outwards, the sound insulation effect is achieved, sound absorption sponge can be assembled in the isolation cavity, and when the sound requirement standard is higher, the sound absorption sponge can be assembled in the isolation cavity to absorb sound, and the better mute effect is achieved. The box body is made of the zinc alloy material, so that the structural strength of the product is effectively enhanced, the planetary gear ring is made of the plastic material, the isolation cavity is formed between the outer wall of the planetary gear ring and the inner wall of the containing cavity in a matched mode, and the sound absorption sponge can be placed in the containing cavity, so that noise generated during operation is effectively reduced, and the silence effect is achieved.

The invention relates to test equipment and a test method for an automobile lifting glass motor, the test equipment comprises a conveying mechanism, a transfer mechanism and two detection mechanisms, the transfer mechanism is located between the conveying mechanism and the two detection mechanisms, each detection mechanism comprises a sound insulation cabinet, and a transfer mechanism and a sound insulation detection assembly are arranged in each sound insulation cabinet. The sound insulation detection assembly is located above the transfer mechanism, the sound insulation detection assembly comprises a first lifting driving mechanism, a sound insulation box and a plurality of detection assemblies, the first lifting driving mechanism is installed in the sound insulation cabinet, and the driving end of the first lifting driving mechanism is connected with the sound insulation box; the soundproof box is internally provided with a plurality of soundproof cavities used for installing the detection assemblies, and the first lifting driving mechanism is used for driving the soundproof box to drive the detection assemblies to detect the motors on the transfer mechanism one by one. The test equipment for the automobile lifting glass motor not only has high detection efficiency, but also improves the detection accuracy.