16 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.

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 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 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.

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 present application relates to the technical field of power plant induced draft fan detection, and particularly relates to a power plant induced draft fan sound and vibration combined measurement device, which comprises a measurement device body, the measurement device body comprises a detection head and a positioning seat, the detection head is detachably arranged at one side end of the positioning seat, a noise sensor is fixed at one side end of the positioning seat, a gravity sensor is arranged in the positioning seat, a plurality of elastic membranes are arranged at one side of the detection head close to the gravity sensor, the elastic membranes are attached to the surface of the gravity sensor, the detection head is provided with a through groove, the elastic membranes are located at one end of the through groove and close the through groove, and a gas sleeve for attaching to the outer surface of the induced draft fan is sealingly inserted into the other end of the through groove. The present application detects the related information of noise through the noise sensor, and for vibration, the impact force, impact amplitude and impact frequency in the vibration generation process can be detected through the gravity sensor and the corresponding auxiliary structure.

This invention provides a non-contact quartz-enhanced photoacoustic spectroscopy gas detection device, comprising: a gas chamber and a quartz tuning fork; the gas chamber includes: two gas buffer zones and an acoustic resonant cavity; a slit opening is formed in the middle of the acoustic resonant cavity, and the slit opening is filled by an elastic membrane; the quartz tuning fork is placed outside the gas chamber, and its vibrating arm is coupled to the elastic membrane on the acoustic resonant cavity, the two can be in contact or not; when a laser passes through the acoustic resonant cavity, under the action of photoacoustic effect, the sound wave excited by the laser beam forms a standing wave in the acoustic resonant cavity, and the sound wave signal corresponding to the standing wave passes through the elastic membrane to form a vibration wave, which drives the vibrating arm of the quartz tuning fork to vibrate; the vibration signal intensity of the quartz tuning fork vibrating arm is positively correlated with the gas concentration in the gas chamber, and the gas detection device can detect the gas concentration without the quartz tuning fork coming into contact with the gas. The device provided by this invention is of great significance for the detection of corrosive gases and dusty gases.