39 results about "Elastic membrane" patented technology

The invention relates to the field of building materials, in particular to a novel light sound insulation composite wallboard and a preparation method thereof.The composite wallboard comprises a first layer and a second layer which are compounded in sequence; the first layer is a gradient closed-cell foam layer, and the density of the first layer is distributed in a gradient increasing mode from the first surface away from the second layer to the second surface compounded with the second layer. The second layer is an integrated micro-perforated-adjustable neck depth honeycomb layer and comprises a micro-perforated panel, an adjustable neck depth element and a honeycomb core which are arranged in sequence; the micro-perforated panel is connected with the first layer, the neck depth adjustable element is an elastic film, and the elastic film, the micro-perforated panel and the honeycomb core jointly define a plurality of Helmholtz resonant cavities. According to the light sound insulation composite wallboard, efficient introduction of sound waves is achieved through impedance gradual change design, the adjustable resonance dissipation unit conducts targeted absorption on low-frequency noise, full-frequency-band and high-performance air sound isolation from low frequency to high frequency is achieved, and dual optimization of acoustic performance and space efficiency is achieved.

The utility model discloses a stove which comprises a stove body and a flame generator arranged on the stove body, an audio device is arranged on the stove body, the stove body is provided with a containing space at the upper end of the audio device, the flame generator is arranged in the containing space, and a flame generating cavity is arranged in the flame generator. The lower end of the flame generator is provided with a mounting hole correspondingly matched with the audio device, an elastic film is arranged in the mounting hole, audio sound waves played by the audio device enable flames generated above the flame generator to dynamically change through the elastic film, the furnace body serves as a sound box, and the furnace can serve as heating equipment and can play music. And the flame on the top surface of the stove can change along with the fluctuation of the music to form a phenomenon of waving along with the music, so that double enjoyment of vision and hearing is brought.

To provide a thin and light-weight soundproof structure that can provide sufficient sound insulating properties, and can be easily and stably mounted on a panel of an automobile having a curved surface or irregularities.SOLUTION: A soundproof structure 8 is arranged in one or both of at least part of a position at which a space in which a rear wheel tire is accommodated and a cabin are partitioned from each other and at least part of a position at which a space in which a front wheel tire is accommodated and the cabin are partitioned from each other, in an automobile, and includes a soundproof structure part 8a. The soundproof structure part 8a has a film part 2 having elasticity, support wall parts 3 erected on the film part 2 and having elasticity, and weight parts 4 erected on the film part 2. The film part 2 is divided into a plurality of sections by the support wall parts 3, and one weight part 4 is arranged in one section. The height of the support wall part 3 is larger than the height of the weight part 4. Each of the weight parts 4 forms a spring-mass resonator having a spring part 4a having elasticity and a mass part 4b having a larger mass than the spring part 4a.SELECTED DRAWING: Figure 3

This invention provides a thin and lightweight sound-insulating structure that offers sufficient sound insulation, can be easily and stably mounted on curved surfaces, and has good sound insulation in the low-frequency range. [Solution] The sound-insulating structure 1 has an elastic membrane portion 2 and a weight portion 4 erected on the membrane portion 2. Each of the weight portions 4 constitutes a spring-mass resonator having an elastic spring portion 4a and a mass portion 4b with a mass greater than that of the spring portion 4a. The durometer A hardness of the membrane portion 2 is 30 or less.

The utility model provides electronic equipment, and relates to the technical field of electronics. The electronic device comprises: a housing having a pressure relief hole; the sound production module is arranged in the shell; the sound production module is provided with a damping hole; the pressure relief assembly is arranged in the shell, the pressure relief assembly comprises a pressure relief pipe and a waterproof breathable film, one end of the pressure relief pipe is communicated with the pressure relief hole, the other end of the pressure relief pipe is communicated with the damping hole, and the waterproof breathable film blocks one end of the pressure relief pipe; the elastic film is arranged in the shell, a closed cavity is defined by the elastic film and the shell, and the closed cavity is filled with gas. The sound quality of the electronic equipment can be improved.

The utility model relates to diaphragm technical field, concretely is a kind of novel elastic composite flat diaphragm, the flat diaphragm includes support and diaphragm component, hollow hole is opened in the support, the diaphragm component is fixed on support, and hollow hole is completely shielded, the diaphragm component includes elastic membrane layer and the metal layer being arranged on the upper and lower ends of elastic membrane layer, electrically conductive coil is arranged at hollow hole on the metal layer, the both ends of electrically conductive coil are all provided with conducting point, and the conducting point and electrically conductive coil are electrically connected, and the protective layer is provided on the end face of electrically conductive coil away from metal layer. The utility model has simple structure, reasonable in design, diaphragm sound production effect is good, service life is long, and electrically conductive coil resistance adjustable, satisfy the use demand of different products, it is worth promoting and using.

The application provides a soundproof cover, a control method and a compressor. The soundproof cover comprises a cover body and a unit cell for noise reduction. The inner wall of the cover body is arranged with a plurality of unit cells. The cover body has a containing cavity for placing a noise source. The unit cell comprises a mounting frame and an elastic membrane. The mounting frame has a cavity. The side wall of the elastic membrane is connected with the inner wall of the mounting frame. A first cavity chamber faces the containing cavity. A second cavity chamber forms a soundproof chamber with the inner wall of the cover body. A mass is arranged on the side of the elastic membrane facing the containing cavity. The pre-tightening force of the elastic membrane is adjustably arranged. Since the inner wall of the cover body is arranged with a plurality of unit cells and the pre-tightening force of the elastic membrane can be adjusted, the soundproof cover can effectively reduce noise with different peak frequencies, thereby meeting the requirement of effectively reducing noise of the noise source under different operating frequencies.

Cooling device for cooling a position-sensitive component (17-19, M1-M6, 35, 36) of a semiconductor lithography system, in particular a projection exposure system. The cooling device comprises a component (40, 50) connected to a cooling line (29) and through which a cooling fluid flows, with an elastic membrane (41, 51) which is in contact with the cooling fluid (44) on an inner surface (42, 52). The cooling device further comprises a mechanical actuator (26, 26') which is configured to exert an adjustable force on the elastic membrane (41, 51) in order to influence the vibration behavior of the elastic membrane (41, 51). The invention further relates to a cooling system and a projection exposure system, each of which has such a cooling device.The actuator allows the vibration behavior of the elastic membrane to be adapted to characteristic frequencies of sound waves within the cooling system, thereby improving sound damping.

The application provides a bone voiceprint sensor, which comprises a first circuit board, a cavity formed in the lower surface of the first circuit board, a sound hole and an exhaust passage formed in the upper surface of the first circuit board, a vibration system arranged in the cavity, a support part, an elastic membrane arranged on the support part, and a mass arranged on the elastic membrane, wherein the elastic membrane divides the cavity into a first lower chamber and a second upper chamber, a second circuit board arranged below the first circuit board and sealing the cavity, a MEMS microphone assembly arranged on the upper surface of the first circuit board and communicating with the cavity through the sound hole, and a shell connected with the first circuit board and enclosing a containing cavity containing the MEMS microphone assembly, wherein the containing cavity communicates with the first chamber through the exhaust passage. The bone voiceprint sensor can improve the compact structure, improve the packaging integration, improve the sensitivity of the microphone, simplify the process, improve the reliability, and reduce the cost.

------09 / 04 / 2564------(OCR) This invention relates to a diffuser with a tubular substrate fitted with air inlets and outlets, and a flexible membrane covering the outer surface of the tubular substrate. The flexible membrane has several slits that pass through from its inner to outer surface, and projections extending toward the tubular substrate and outward along its axial direction are arranged on the inner surface of the flexible membrane. ------------ This invention relates to a diffuser with a tubular substrate fitted with an air inlet. And the air passages and a flexible membrane that covers the outer surface of the tubular substrate where the membrane... The elastic membrane has a number of slits that allow passage from the inner surface to the outer surface of the elastic membrane. And the projections that extend towards the tubular substrate and outward in the axial direction of the tubular substrate are positioned at: The inner surface of the elastic membrane.

This invention provides a thin and lightweight sound-insulating structure that offers sufficient sound insulation, can be easily and stably mounted on curved surfaces, and has good sound insulation in the low-frequency range. [Solution] The sound-insulating structure 1 has an elastic membrane portion 2, an elastic support wall portion 3 erected on the membrane portion 2, and a weight portion 4 erected on the membrane portion 2. The membrane portion 2 is divided into a plurality of sections 5 by the support wall portion 3, and the weight portion 4 is located inside all or some of the plurality of sections 5, and in the sections 5 in which the weight portion 4 is located, one weight portion 4 is arranged in each section 5. The height H1 of the support wall portion 3 in the direction perpendicular to the membrane portion 2 is greater than the height H2 of the weight portion 4 in the direction perpendicular to the membrane portion 2. Each of the weight portions 4 constitutes a spring-mass resonator having an elastic spring portion 4a and a mass portion 4b with a mass greater than the spring portion 4a. The area occupied by each section 5 in the membrane portion 2 is 1000 mm². 2 ~2500mm 2 That is the case.

The invention belongs to the technical field of underwater acoustic equipment, and particularly discloses a pneumatic underwater acoustic sounding device which comprises an air storage cavity, a sounding cavity, a resonant cavity, a sound transmission cavity and an airflow ejector. A partition plate is arranged in the air storage cavity and divides the interior of the air storage cavity into a rear cavity and a front cavity, and a connecting pipeline is arranged in the front cavity; one end of the connecting pipeline penetrates through the partition plate and is communicated with the rear cavity, the sealed end of the sounding cavity is hermetically connected to the opened end of the air storage cavity, the sound transmission cavity comprises an elastic film and a substrate, one end of the elastic film is hermetically connected with the sealed end of the resonant cavity, and the interior of the elastic film is communicated with the other end of the resonant tube; the airflow ejector is arranged in the front cavity in a penetrating mode and provided with an inlet end and an outlet end, the inlet end is communicated with the rear cavity through a pipeline, an energy accumulator is arranged on the pipeline, and the outlet end is communicated with the interior of the sound production cavity. The underwater sustainable working time of the device is longer than that of other similar sound sources, the cost is saved, and the reliability is improved.

The application provides a bone voiceprint sensor, which comprises a first circuit board, a first cavity, and an exhaust passage connected with the first cavity; a second circuit board, a second cavity, an acoustic hole connected with the second cavity, and an exhaust hole corresponding to the position of the exhaust passage; a vibration system arranged in a vibration space formed by the first cavity and the second cavity, comprising an elastic membrane arranged on a first surface and covering the first cavity, and a mass block arranged on the elastic membrane; a MEMS microphone assembly arranged on the second circuit board and connected with the cavity through the acoustic hole; and a shell connected with the second circuit board and enclosing a containing cavity containing the MEMS microphone assembly, wherein the containing cavity is connected with the first cavity through the exhaust hole and the exhaust passage. The bone voiceprint sensor can improve the compact structure, improve the packaging integration, improve the sensitivity of the microphone, simplify the process, improve the reliability, and reduce the cost.

The present invention provides a thin and lightweight sound-insulating structure that offers sufficient sound insulation, can be stably mounted, and has good sound insulation over a wide frequency range. [Solution] The soundproofing structure 11 comprises a sound-insulating structure 1 and a plate-shaped member 8 on which the sound-insulating structure 1 is placed. The sound-insulating structure 1 comprises an elastic membrane portion 2 and a weight portion 4 erected on the membrane portion 2. Each of the weight portions 4 constitutes a spring-mass resonator having an elastic spring portion 4a and a mass portion 4b with a greater mass than the spring portion 4a. The plate-shaped member 8 is made of aluminum, an aluminum alloy, or resin.

The invention relates to the technical field of vibrating diaphragms, in particular to a novel elastic composite flat vibrating diaphragm and a forming process thereof.The flat vibrating diaphragm comprises a support and a diaphragm assembly, the support is provided with a hollowed-out hole, and the diaphragm assembly is fixed to the support and completely shields the hollowed-out hole; the membrane assembly comprises an elastic membrane layer and metal layers arranged on the upper end face and the lower end face of the elastic membrane layer, conductive coils are arranged at the positions, located at the hollowed-out holes, of the metal layers, the two ends of each conductive coil are each provided with a conduction point, and the conduction points are electrically connected with the conductive coils. A protective layer is arranged on one end face of the conductive coil away from the metal layer. The loudspeaker is simple in structure, reasonable in design, good in diaphragm sounding effect, long in service life, adjustable in resistance of the conductive coil, capable of meeting use requirements of different products, and worthy of vigorous popularization and application.

To provide a damper member capable of suppressing connection failure of an elastic film, and to provide a liquid discharge head, a liquid discharge device and a recording device including the damper member.SOLUTION: A damper member 6 is a member to be arranged on a second channel member 5 in a liquid discharge head 2. In the damper member 6, a first damper plate 61 and an elastic film 63 are connected by a first connection sheet 62. The first connection sheet 62 comprises: a partition wall connection part 625 for connecting a partition wall part 615 of the first damper plate 61 and the elastic film 63; a first peripheral wall connection part 626 for connecting a first peripheral wall part 616 of the first damper plate 61 and the elastic film 63; a second peripheral wall connection part 627 for connecting a second peripheral wall part 617 of the first damper plate 61 and the elastic film 63; and a connection part 628 for connecting the first peripheral wall connection part 626, the partition wall connection part 625 and the second peripheral wall connection part 627.SELECTED DRAWING: Figure 8

The present invention relates to an initialization device for an elastic membrane, a polishing apparatus, an initialization method for an elastic membrane, and a life determination method for an elastic membrane. The initialization device (50) for the elastic membrane (10) includes a pressurizing device (55), an expansion amount detection device (58), and a control device (40) configured to compare an expansion amount detected by the expansion amount detection device (58) with a predetermined target expansion amount, and when the expansion amount reaches the target expansion amount, determine a completion of an initialization of the elastic membrane (10).

A moving-coil loudspeaker with a spherical vibrating diaphragm comprises the vibrating diaphragm, a magnet, a folding ring and a support, the magnet is fixed on the support, the magnetic field of the magnet is open, the end face of one end of the magnet is a plane, the other end of the magnet extends outwards in a branch shape, the tail end of the branch shape is connected with a magnetic conductive spherical surface, and the magnetic conductive spherical surface is connected with the support. And a spherical magnetic field with the same magnetic field direction as the spherical surface direction of the point is formed. A spherical elastic film is arranged in the center of a spherical magnetic field space, the elastic film is insulated, a plurality of pieces of spiral conductive rubber are adhered to the surface of the insulated spherical elastic film, each piece of spiral conductive rubber forms a spiral coil, and the spiral coil is wound on the surface of the elastic film. The heads and the tails of the spiral coils are orderly connected in series or in parallel through bridging leads or conductive rubber, so that the directions of magnetic poles generated by current conducted by the connected spiral coils are consistent along respective radius directions. The loudspeaker has many sound vibration sources and a good three-dimensional effect.

The invention relates to an elastic film (1) having at least one core layer (3) based on styrene block copolymers, the at least one core layer (3) being arranged between at least two cover layers (2). The cover layers (2) have elastic properties without activation, the film (1) having a force of less than 3.75 N when stretched by 160% in a first loading cycle. For this purpose, a film strip for the loading cycle has a width of 25 mm in the MD direction and the film strip is fastened, at a CD distance of 25 mm, between grippers of a testing device and the film strip is stretched in CD at a speed of 254 mm / min.

The present invention is directed to a recirculation system for use in microfluidic centrifugal disc platforms for reusing and mixing an entire sample. The present invention features a system comprising a reservoir, an input channel, a detection array, a pressure chamber, and a recirculation channel connecting the pressure chamber to the reservoir. The recirculation channel may have a resistance lower than the channel upstream resistance. When the CD platform spins at a high RPM, the liquid may be directed from the reservoir into the pressure chamber. When the RPM of the CD platform decreases rapidly, the liquid may be directed from the pressure chamber through the channel and through the recirculation channel to the reservoir, such that the liquid travels through the recirculation channel faster than the liquid travels through the channel.

Sound insulation structure 1 comprises elastic membrane part 2, elastic support wall part 3 standing on membrane part 2, and weight parts 4 standing on membrane part 2. Membrane part 2 is divided into a plurality of compartments 5 by support wall part 3. Weight parts 4 are located inside some or all of the plurality of compartments 5. In compartments 5 in which weight parts 4 are located, one weight part 4 is disposed in one compartment 5. Height H1 of support wall part 3 extending in a direction perpendicular to membrane part 2 is greater than height H2 of weight parts 4 extending in the direction perpendicular to membrane part 2. Each of weight parts 4 constitutes a spring mass resonator having spring part 4a having elasticity and mass part 4b having a mass greater than that of spring part 4a. Sound insulation structure 1 provides sufficient sound insulation, can be easily and stably mounted on a curved support surface, and is thin and lightweight. Soundproof structure 11 comprises soundproof plate part 10 and sound insulation part 9 that comprises sound insulation structure 1. At least one of membrane part 2 and support wall part 3 is integrally formed with or is joined with soundproof plate part 10, and soundproof plate part 10 and sound insulation part 9 are positioned side by side in a plane.

To provide a thin and light-weight soundproof structure that can provide sufficient sound insulating properties, and can be easily and stably mounted on at least part of a member that partially separates a cabin of an automobile, which may have a curved surface or irregularities, from the outside of the automobile.SOLUTION: A soundproof structure 1 is arranged at at least part of a member that partially separates a cabin of an automobile from the outside of the automobile, and has a film part 2 having elasticity, support wall parts 3 erected on the film part 2 and having elasticity, and weight parts 4 erected on the film part 2. The film part 2 is divided into a plurality of sections by the support wall parts 3, and the weight parts 4 are located inside all the sections or some of the sections. One weight part 4 is arranged in one section. The height of the support wall part 3 extending in a direction orthogonal to the film part 2 is larger than the height of the weight part 4 extending in the direction orthogonal to the film part 2. Each of the weight parts 4 forms a spring-mass resonator having a spring part 4a having elasticity and a mass part 4b having a larger mass than the spring part 4a.SELECTED DRAWING: Figure 7

The application provides a metamaterial muffler, comprising: a main body section, the main body section comprising a low-frequency muffling module and a medium-frequency muffling module connected, a plurality of low-frequency muffling channels provided in the low-frequency muffling module and a plurality of medium-frequency muffling channels provided in the medium-frequency muffling module are in one-to-one correspondence and in communication; a transition section, at least one end of the main body section is connected with the transition section, the transition section comprises a plurality of air guide modules, the plurality of air guide modules are spliced with each other and are arranged in one-to-one correspondence with the plurality of low-frequency muffling channels; each air guide module comprises: an outer frame, which is hollow; an inner frame, which is arranged in the outer frame, the inner frame is hollow to form an air guide channel, a first end of the inner frame is fixedly connected with a first end of the outer frame in a circumferential direction, a second end of the inner frame is flush with a second end of the outer frame, an inner diameter of the inner frame gradually decreases in a direction towards the second end of the inner frame, an elastic membrane is fixed to an inner wall of the inner frame, and the second end of the inner frame is arranged towards the main body section; a baffle, which blocks a space between the inner frame and the outer frame at the second end of the inner frame, and the inner frame, the outer frame and the baffle enclose a cavity.

The invention discloses a silencing and filtering box body structure of a fan and a working method of the silencing and filtering box body structure, and relates to the technical field of fan equipment, and the box body structure comprises an air inlet cabin body, a working cabin body and an air outlet cabin body which are arranged from top to bottom. A labyrinth type air inlet channel and a filtering unit are sequentially arranged in the air inlet cabin body in the air flow direction. An elastic membrane of the device divides a driving cavity into two chambers which are respectively communicated with a pressure pulsation source and a first filtering cavity, and the elastic membrane can directly act on an elastic core material of a first-stage filtering module through a top opening. When the system runs, the diaphragm can be driven to move periodically by utilizing pressure pulsation of the system or external pressure pulsation, so that the filter element is automatically cleaned. The noise reduction, filtering and self-cleaning functions are highly integrated, the structure is compact, noise can be effectively reduced, vibration can be effectively isolated, the maintenance frequency is remarkably reduced through self-adaptive cleaning, and the fan operation energy efficiency and reliability are improved.

The utility model discloses a self-adaptive adsorption industrial stethoscope based on a double-microphone structure, and relates to the technical field of mechanical vibration and acoustic detection, the self-adaptive adsorption industrial stethoscope comprises a stethoscope head and an electronic acquisition module; the auscultation head comprises an auscultation head shell, a hyperbolic flexible suction cup, an elastic membrane, a mechanical linkage assembly and an acoustic conversion assembly. The hyperbolic flexible suction cup is fixed to the front end of the stethoscope head shell, and the elastic membrane is sealed in an inner cavity to define a closed coupling cavity. And the operation piece of the mechanical linkage assembly rotates to drive the traction piece to displace, so that the elastic membrane deforms to generate negative pressure. The acoustic conversion assembly comprises a main microphone located in the closed coupling cavity and an auxiliary microphone located on the outer wall of the auscultation head shell. The hyperbolic flexible suction cup is matched with a mechanical negative pressure structure, so that single-hand fixation and self-adaptive adsorption on surfaces with various curvatures are realized, a stable acoustic measurement channel is established, and handheld jitter noise is avoided; through the physically isolated internal and external dual-microphone layout, the environmental noise is separated from the hardware source, and the measurement signal-to-noise ratio is improved.

To provide a thin and light-weight soundproof structure that can provide sufficient sound insulating properties, and can be easily and stably mounted on a panel of an automobile having a curved surface or irregularities or an automobile member mounted on the panel.SOLUTION: A soundproof structure 1a is arranged at part of a position at which a space 12 in which a front wheel tire 11 of an automobile is accommodated and a cabin 13 are partitioned from each other, and has a film part 2 having elasticity, support wall parts 3 erected on the film part 2 and having elasticity, and weight parts 4 erected on the film part 2. The film part 2 is divided into a plurality of sections by the support wall parts 3, and the weight parts 4 are located inside all the sections or some of the sections. One weight part 4 is arranged in one section. The height of the support wall part 3 extending in a direction orthogonal to the film part 2 is larger than the height of the weight part 4 extending in the direction orthogonal to the film part 2. Each of the weight parts 4 forms a spring-mass resonator having a spring part 4a having elasticity and a mass part 4b having a larger mass than the spring part 4a.SELECTED DRAWING: Figure 2

To provide a thin and light-weight sound insulation structure with a sufficient sound insulation property, capable of being easily mounted on a curved mounting surface in a stable manner.SOLUTION: A sound insulation structure 1 comprises: a film part 2 having elasticity; a support wall part 3 having elasticity, erected on the film part 2; and a weight part 4 erected on the film part 2. The film part 2 is divided into a plurality of sections 5 by the support wall part 3, and the weight part 4 is disposed respectively inside the sections 5. One weight part 4 is provided in one section 5. A height H1 of the support wall part 3, extending in a direction orthogonal to the film part 2 is greater than a height H2 of the weight part 4, extending in the direction orthogonal to the film part 2. Each weight part 4 constitutes a spring-mass resonator having a spring part 4a having elasticity and a mass part 4b having a greater mass than the spring part 4a. At least a portion of the support wall part 3 has a tapered shape that becomes tapered towards a tip part opposite the film part 2.SELECTED DRAWING: Figure 1

The utility model relates to a novel vibrating diaphragm with a dangling edge for a moving-iron loudspeaker in the audio field, which comprises a central sheet and an elastic diaphragm, support structures are arranged at two ends of the elastic diaphragm, the central sheet is arranged in the support structures, and a gap is reserved between the central sheet and the support structures. And a dangling edge part is formed at the position, corresponding to the gap, of the elastic membrane. According to the utility model, the central sheet is installed on the elastic diaphragm, when the central sheet vibrates, the elastic diaphragm can help the central sheet to rapidly reset and eliminate noise, thereby improving the purity and definition of tone quality, further, the design of the dangling edge part thoroughly solves the problem of insufficient vibration amplitude of the diaphragm, the lowest resonant frequency of the loudspeaker is greatly reduced, and the loudspeaker is more compact. And the low-frequency expressive force is improved, so that the sound quality and the hearing experience are further improved.

The utility model discloses an assembly type building wall body with a sound absorption structure, which comprises a wall body, a sound insulation plate is fixedly arranged in the wall body, a plurality of uniformly distributed mounting hole grooves are formed in the sound insulation plate, and sound attenuation cones are fixedly arranged in the mounting hole grooves. The noise reduction cone comprises a mounting ring fixedly mounted in the sound insulation plate, an inner noise reduction ring located in the mounting hole groove is fixedly mounted on one side of the mounting ring, an elastic film is fixedly mounted in the middle of the mounting ring, an outer noise reduction ring is integrally connected to the outer circumferential face of the inner noise reduction ring, and a turbulent flow groove is formed in the inner circumferential face of the inner noise reduction ring. Noise vibration is continuously reflected and absorbed through the turbulent flow grooves and the turn-back slopes and then absorbed through the silencing grooves, so that the noise is further reduced, meanwhile, the arranged elastic films and the cavities formed by the elastic films and the bottoms of the mounting groove holes can also buffer and absorb the noise, and the effect of reducing the noise can be achieved.

The utility model discloses a water vapor transmission rate testing device of an ultra-high barrier film, which relates to the technical field of ultra-high barrier film testing and comprises a working plate, an oxygen transmission rate detection structure and a resistance detection structure are mounted on the working plate, and the oxygen transmission rate detection structure comprises an oxygen box. A sliding pipe is fixedly connected to the upper side of the oxygen box in a penetrating mode, a piston is slidably connected to the interior of the sliding pipe, and a sliding rod is fixedly connected to the upper side of the piston; then gas is injected into the gas storage tank, so that the pressure value in the gas storage tank is kept in a state that the middle part of the elastic film is bulged and the to-be-detected film is bent when the elastic film is bulged, and then the electrode stem is connected with an external digital source meter; the air permeability of the to-be-detected film can be tested according to the change value of the resistivity when the detection film is bent; the air permeability and the oxygen permeability of the membrane to be detected can be tested through the two testing methods of resistance detection and oxygen permeability detection, so that the testing result is more accurate.