54 results about "Acoustic membrane" patented technology

The invention relates to a self-guiding ultrasonic treatment head and an ultrasonic treatment hand tool, and belongs to the technical field of medical instruments.The self-guiding ultrasonic treatment head comprises a treatment head shell, a sound transmission film, a moving shaft, an energy conversion assembly, a first sealing sleeve, a second sealing sleeve and a deflection force generation structure, and the sound transmission film covers a sound transmission opening of the treatment head shell in a sealing mode; one end of the moving shaft is movably inserted into the treatment head shell, the transduction assembly comprises an installation support and a transducer, a first limiting face is formed in the treatment head shell, the deflection force generating structure enables the installation support to deflect, and a first guide protrusion of the installation support abuts against the first limiting face all the time. According to the self-guiding ultrasonic treatment head and the ultrasonic treatment hand tool provided by the invention, the mounting bracket is deflected towards the first limiting surface through the deflection force generating structure, and the first guiding bulge always abuts against the first limiting surface, so that the movement straightness of the transduction assembly is improved, the movement of the transduction assembly is not excessively hindered, and the service life of the transduction assembly is prolonged. And the transduction assembly is prevented from moving and blocking or being locked.

Systems and methods for a MEMS microphone package are disclosed. The MEMS microphone package may include a first port to direct sound to a MEMS system, including a die substrate, an acoustic membrane, and one or more plates. The MEMS microphone package may include an ASIC to produce microphone output based on an electrical signal, a PCB, a lid, and a second port. The first port and the second port may define a front volume and a back volume respectively. The second port may increase the back volume to improve sensitivity and reduce the acoustic sensor's noise floor to improve signal-to-noise ratio.

The invention relates to a microphone assembly, especially for external use for a vehicle, comprising: - a housing base comprising at least one compartment; - a PCBA (Printed Circuit Board Assembly) with at least one acoustic membrane; - a sealing cover at least partially overlapping the compartment; - wherein the sealing cover comprises at least one opening at least partially aligned with the acoustic membrane; - further comprising a housing cover; - wherein the housing cover comprises a first grid at least partially aligned with the opening in the sealing cover; - and a shielding cover; - wherein the shielding cover comprises a second grid at least partially aligned with the opening in the sealing cover; wherein the first grid and the second grid are offset aligned in order to provide a labyrinth path without a straight through passage from the outside of the microphone assembly to the acoustic membrane.

A ventilation assembly unit for an electronic housing is presented, the ventilation assembly unit comprising a surrounding element and a ventilation assembly comprising a first permeable layer, a substantially impermeable acoustic membrane, a second permeable layer and an acoustic transducer; a first permeable layer positioned on a first side of the substantially impermeable acoustic membrane and a second permeable layer positioned on a second side of the substantially impermeable acoustic membrane; defining an acoustic volume between the substantially impermeable acoustic membrane, the second permeable layer, and the acoustic transducer; wherein the ventilation assembly unit is configured to be mounted over an aperture in the enclosed container such that the enclosing element isolates the ventilation assembly from an interior volume of the enclosed container and defines a containment volume between the ventilation assembly and the enclosing element, the ventilation assembly is configured during use such that an air passage is disposed from outside the enclosed container, through the first permeable layer, through the containment volume, and through the second permeable layer to the acoustic volume.

This application relates to a waterproof sealing mechanism for a microphone and an electronic device. Based on this application, a sound transmission channel can be formed between a sound-permeable hole in the device housing and a microphone mounted on a module substrate. Furthermore, a waterproof sound-permeable membrane and a sealing film are stacked and sealed between the module substrate and the device housing. The waterproof sound-permeable membrane is horizontally placed within the sound transmission channel, and the sound-permeable holes of the sealing film seal and surround the sound transmission channel penetrating the waterproof sound-permeable membrane between the substrate's pickup hole and the sound-permeable hole, thereby achieving a waterproof seal for the sound transmission channel. Additionally, the sealing film also forms a sealed partition around the outer periphery of the waterproof sound-permeable membrane between the device housing and the module substrate, achieving a secondary waterproof seal for the sound transmission channel. This improves the impact of the sound-permeable hole on the sealing performance of the device housing. Furthermore, if a microphone array containing multiple microphones is used, the sealing consistency of the multiple sound-permeable holes can also be ensured.

The utility model discloses an online acoustic module with waterproof sound -transmitting membrane structure of quick replacement, including acoustic module main part, microphone FPA board, waterproof sound -transmitting membrane and magnetic formula fixing structure. The acoustic module main part is inlayed with first annular strong magnetic sheet at microphone FPA board fixed surface, and waterproof sound -transmitting membrane is compacted on FPA board through pressing plate, and the inlayed second annular strong magnetic sheet in pressing plate realizes quick dismounting with magnetic attraction principle. Module adopts the cooperation of positioning column and positioning hole to ensure installation accuracy, and is equipped with foamed silica gel O ring and is enhanced sealed dustproof performance. The handle of pressing plate design is convenient for operation, and the front shell adopts light weight aluminum alloy material to reduce acoustic interference. The utility model discloses through magnetic formula structure simplifies the replacement process of waterproof sound -transmitting membrane, improves maintenance efficiency, guarantees the stability and sealing property of connection simultaneously, and is applicable to the long -term reliable acoustic monitoring demand in industrial environment.

The utility model provides a direct installation warning tower lamp which comprises a buzzer cover, a sound production circuit board assembly, a lamp shell, a light-emitting circuit board assembly, a bottom sleeve and an installation base, the sound production circuit board assembly, a waterproof sound transmission film and double-faced adhesive sealing foam are coaxially fastened in the buzzer cover through screws, the sound production circuit board assembly is provided with a sound production buzzer, and the light-emitting circuit board assembly is provided with a waterproof sound transmission film. The buzzer cover and the lamp shell are installed in a clamping mode in a buckling mode, the light-emitting circuit board assembly is installed on the installation base, lamp beads are integrated on the light-emitting circuit board assembly, the lamp shell and the bottom sleeve are coaxially fastened through screws, and the bottom sleeve and the installation base are coaxially fastened through screws. According to the warning tower lamp, waterproof rings are arranged at the joint of a buzzer cover and lamp shells, the joint of the lamp shells, the joint of the lamp shells and a bottom sleeve and the joint of the bottom sleeve and a 3PIN mounting base; and a space enclosed by the buzzer cover, the lamp shell, the bottom sleeve and the 3PIN mounting base is sealed. The directly-installed warning lamp is good in sealing effect and high in waterproof performance.

A waterproof sound-transmitting film according to an embodiment includes a polyurethane and has a bio-based content of 20% or more. The waterproof sound-transmitting film can be provided with reduced environmental load.

The invention relates to an acoustic device (10) for a ringing member, comprising: an acoustic membrane (20); at least one piezoelectric element (30, 30a, 30b, 30c, 32) arranged to cooperate with the acoustic membrane (20); and at least one electrical circuit (40a, 40b) integrated with a piezoelectric element. The acoustic device (10) further comprises at least one spring strip (12, 14) that can be struck by a hammer. Comprising a piezoelectric element (30, 30a, 30b, 30) and a circuit (40a, 40b) is configured to adjust the resonant frequency of the acoustic membrane (20) in accordance with the resonant frequency of the at least one spring strip (12, 14). The invention also relates to a sounding member, in particular a timepiece, comprising said acoustic device (10).

The invention relates to the technical field of production of rubber membrane materials, in particular to a production process and system of a low-temperature-resistant rubber acoustic membrane. The method comprises the following steps: taking AEM as a base material, and completing the basic preparation of the low-temperature-resistant rubber acoustic membrane through the links of banburying and rubber mixing, open milling and sheet discharging, coating and membrane preparation, and vulcanization and shaping; dividing a current low-temperature-resistant rubber acoustic membrane detection sub-region, acquiring detection data of each link of the sub-region for the same detection batch, and performing detection link linkage to generate a comprehensive detection result of the detection sub-region; dynamically adjusting a parameter strategy based on the deviation level and source of the comprehensive detection result; the system comprises a rubber acoustic membrane preparation module, a detection step linkage module and a production parameter dynamic adjustment module. Through the mode, the accuracy of a production detection result is improved, so that the production quality of the low-temperature-resistant rubber acoustic membrane is improved.

The utility model provides a waterproof membrane sound transmission assembly, which comprises a dustproof gauze, a connecting adhesive tape, a waterproof sound transmission membrane and a bonding layer, the dustproof gauze and the waterproof sound transmission membrane are bonded together through the connecting adhesive tape, the waterproof sound transmission membrane is bonded on an acoustic product through the bonding layer, a support material layer is bonded on the upper surface of the dustproof gauze, and the bonding layer is an AB double faced adhesive tape. The surface A of the AB double-faced adhesive tape is silica gel, the surface B of the AB double-faced adhesive tape is acrylic adhesive, the silica gel of the surface A is bonded with the acoustic product, and the acrylic adhesive of the surface B is bonded with the waterproof sound-transmitting film. The bonding layer is the AB double-faced adhesive tape, a traditional multi-layer structure is replaced, the processing flow can be reduced, and the thickness of the product can be better controlled; meanwhile, the dustproof gauze and the supporting material layer are additionally arranged outside the waterproof sound-transmitting membrane, the dustproof gauze has a good dustproof effect, pollution of dust to the waterproof sound-transmitting membrane can be effectively reduced, impact force is effectively reduced when water flow impact exists, and the waterproof effect is improved.

An acoustic vent assembly is provided comprising a nonporous acoustic membrane, and a breathable element, the breathable element defining an aperture and an acoustic pathway extends from a first side of the acoustic vent assembly to a second side of the acoustic vent assembly through the aperture and the nonporous acoustic membrane, the breathable element configured to be positioned between the nonporous acoustic membrane and an acoustic transducer when the acoustic vent assembly is installed in an acoustic device comprising an acoustic transducer.

The application discloses a microphone device, a manufacturing method thereof and a breathing mask, wherein the microphone device comprises a waterproof sound-permeable film, a microphone and an assembling unit, the assembling unit comprises an assembling body and a first assembling arm integrally extending outward from the assembling body, the first assembling arm has an assembling cavity and an assembling opening communicated with the assembling cavity, the microphone is installed in the assembling cavity of the first assembling arm from the assembling opening of the first assembling arm, and a receiving surface of the microphone faces the assembling opening of the first assembling arm, the waterproof sound-permeable film is arranged on the first assembling arm, and the waterproof sound-permeable film seals the assembling opening of the first assembling arm.

The utility model provides a voice diaphragm packaging plate machining device, and belongs to the technical field of voice diaphragm packaging equipment, the voice diaphragm packaging plate machining device comprises a rotating disc, a first conveying belt, a second conveying belt, a nailing machine and a discharging assembly are sequentially arranged on the outer side of the rotating direction of the rotating disc, the first conveying belt is used for conveying paperboards, and the second conveying belt is used for conveying foam pads; a pushing and supporting piece and material blocking pieces arranged in a circumferential array are arranged in the middle of the rotary disc, one face of each material blocking piece abuts against the pushing and supporting piece, limiting plates are symmetrically arranged at the two ends of each material blocking piece respectively, limiting rods are arranged on the opposite sides of the material blocking pieces, so that an assembly area is formed by the limiting rods, the limiting plates and the material blocking pieces in an enclosed mode, and through holes are formed in the rotary disc in a circumferential array mode; the nailing machine comprises a nailing head used for nailing connecting nails into the two ends of the packaging plate. The material assembly comprises an ejector rod which is vertically arranged in a telescopic mode and used for penetrating through the through holes to push out the packaging plates provided with the connecting nails. By means of the scheme, manual work can be replaced, paperboards and foam pads can be automatically stacked and assembled, and efficiency is high.

The utility model discloses a contact-free ring sleeve for an ultrasonic isolation sound-transmitting membrane, and solves the problems that a fixing sleeve for the ultrasonic isolation sound-transmitting membrane in the prior art is inconvenient to disassemble and assemble and cannot ensure that the ultrasonic isolation sound-transmitting membrane is buckled in place at a time. The ultrasonic isolation sound transmission membrane contact-free loop comprises a hook-shaped lower seat and a C-shaped upper seat which are matched in a clamping mode, the hook-shaped lower seat and the C-shaped upper seat are buckled to form a C-shaped cavity, and a C-shaped open groove is reserved in the inner cavity wall of the C-shaped cavity. The hook-shaped lower seat comprises a C-shaped clamping seat part and a handle part which are integrally formed, and the C-shaped upper seat is clamped and matched with the C-shaped clamping seat part through a fastener; and the two ends of the C-shaped upper seat are in limiting fit with the C-shaped clamping seat parts through limiting pieces. According to the utility model, the C-shaped upper seat is peripherally limited between the hook-shaped lower seat and the C-shaped upper seat through the limiting piece arranged at the end part, so that the C-shaped upper seat and the C-shaped clamping seat part can be buckled in place at one time, the matching precision is ensured, the operation is simplified, and the damage to the sound transmission film is reduced.

This invention discloses a highly sensitive detection device and method for immersion-type ultrasonic signal detection in liquids. The invention provides a circular diaphragm with concentric corrugations and a center-thinned structure, and uses this diaphragm as a reflective surface of an optical interference cavity to construct a highly sensitive detection device for immersion-type ultrasonic signal detection in liquids. The diaphragm, used to sense ultrasonic signals, has identical concentric corrugations and a center-thinned structure on both sides, enabling the diaphragm to achieve higher mechanical sensitivity without significantly reducing its natural frequency. The concentric corrugations effectively release initial residual stress introduced during processing and packaging, reducing surface warping and baseline drift. Simultaneously, a replaceable acoustic membrane is constructed in front of the diaphragm, achieving high sound transmission and anti-contamination under long-term immersion in liquid conditions. This detection device can be directly placed in the liquid for detection, improving the sensitivity of ultrasonic signal detection while maintaining a wide frequency range, preventing contamination of the detection element, and ensuring the long-term stability of the detection device.

Systems and methods for a MEMS microphone package are disclosed. The MEMS microphone package may include a first port to direct sound to a MEMS system, including a die substrate, an acoustic membrane, and one or more plates. The MEMS microphone package may include an ASIC to produce microphone output based on an electrical signal, a PCB, a lid, and a second port. The first port and the second port may define a front volume and a back volume respectively. The second port may increase the back volume to improve sensitivity and reduce the acoustic sensor's noise floor to improve signal-to-noise ratio.

A dual-mode audio coding system and a dual-mode audio coding method are provided in the embodiments of the present invention. The system includes a signal transmission device and a signal reception device. The transmission device comprises a first control circuit and a sound circuit, where the sound circuit incorporates a sound diaphragm and an electromagnetic coil. Based on the instructions from the first control circuit, it emits audio sound waves and high-frequency sound waves while transmitting electromagnetic signals through the coil, with the frequency of the high-frequency sound waves being higher than that of the audio sound waves. The reception device consists of a second control circuit, a sound reception circuit, and an electromagnetic reception circuit, which are used to receive audio and high-frequency sound waves as well as electromagnetic signals. The first control circuit modulates communication signals into high-frequency sound waves and electromagnetic signals, while the second control circuit demodulates the received signals to reconstruct the original communication signals.

The utility model discloses a waterproof sound transmission device for an explosion-proof housing, which comprises a buzzer, the buzzer is installed on an end cover through a fixing ring, a fire-retardant net part and a waterproof sound transmission membrane are arranged between the fixing ring and the end cover, and the waterproof sound transmission membrane is clamped between a first multilayer screen element and a second multilayer screen element. According to the waterproof sound transmission device for the explosion-proof shell, the large-decibel buzzer can be installed in the explosion-proof shell, the requirement that a lamp is in a pure explosion-proof and explosion-proof type is met, and the requirement that the large-decibel output of the buzzer is also met.

A watch case for a wristwatch with a musical or ringing mechanism, the case being configured to comprise an acoustic membrane held by its periphery at a bottom of the watch case The watch case comprises a cover comprising a bottom. The cover is articulated mounted between an open position and a closed position in which the bottom of the cover covers an outer face of the acoustic membrane so as to ensure that the membrane can vibrate freely. The watch case further comprises at least one sound diffusion opening

This invention relates to the field of automotive acoustic materials and functional thin films, specifically to a composite acoustic membrane with ultra-thin thickness and high sound insulation performance, and its application in automotive components. It comprises at least two sound wave reflecting layers and at least two damping layers stacked together, with the at least two sound wave reflecting layers and at least two damping layers alternately arranged within the membrane; the total thickness of the ultra-thin composite acoustic membrane is less than or equal to 100 μm. This invention achieves a breakthrough unity of ultra-thinness and high sound insulation: It creatively employs a synergistic acoustic architecture of "at least two sound wave reflecting layers and at least two damping layers alternately arranged," successfully achieving a weighted sound insulation (Rw) of up to 18-28 dB(A) across the entire frequency band at an ultra-thin scale with a total thickness ≤100 μm (preferably 38-50 μm).

The application relates to a self-guiding ultrasonic treatment head and an ultrasonic treatment hand tool, and belongs to the technical field of medical devices. The self-guiding ultrasonic treatment head comprises a treatment head shell, a sound-transmitting film, a moving shaft, a transducing assembly, a first sealing sleeve, a second sealing sleeve and a deflection force generating structure. The sound-transmitting film covers a sound-transmitting port of the treatment head shell. One end of the moving shaft is movably inserted into the treatment head shell. The transducing assembly comprises a mounting bracket and a transducer. A first limiting surface is formed in the treatment head shell. The deflection force generating structure deflects the mounting bracket. A first guiding protrusion of the mounting bracket always abuts against the first limiting surface. The self-guiding ultrasonic treatment head and the ultrasonic treatment hand tool provided by the application deflect the mounting bracket to the first limiting surface through the deflection force generating structure. The first guiding protrusion always abuts against the first limiting surface, which improves the straightness of the movement of the transducing assembly and does not excessively hinder the movement of the transducing assembly, thereby preventing the transducing assembly from being stuck or locked.

The utility model relates to the technical field of medical auxiliary supplies, and discloses an ultrasonic isolation sound transmission membrane for a cavity, which comprises a membrane body and a binding body, the binding body is arranged at the open end of the membrane body and is fixedly connected with the membrane body, the membrane body is sleeved with a first supporting ring in a sliding mode, the binding body is supported by the first supporting ring, and the binding body is fixedly connected with the membrane body. The binding body is arranged on the first supporting ring, so that the binding body cannot be tightly attached to the ultrasonic probe in the process of sleeving the film body, the operation of the process of sleeving the film body is simple, after the film body is completely sleeved, the film body is not wound on the first supporting ring at the moment, the first supporting ring can be directly pulled out, and the binding body can be bound and tightly attached to the root of the ultrasonic probe together with the film body. The isolation effect is further enhanced, liquid or other substances are prevented from entering from the joint of the ultrasonic probe and the membrane body, and it is ensured that the sound transmission membrane can stably play the isolation and sound transmission functions in the cavity examination process.

The present invention provides an acoustic device that suppresses the decrease in sound pressure near a predetermined frequency. [Solution] The sound device comprises a substrate equipped with a circuit for generating a drive signal, an acoustic output element for generating sound waves in accordance with the drive signal, an acoustic film connected to the acoustic output element for diffusing the sound waves, and a housing that houses the substrate, the sound device, and the acoustic film inside, wherein the substrate is provided so as to divide the space inside the housing into an upper cavity and a lower cavity, the upper cavity and the lower cavity are in communication through an opening, and the opening includes a substrate opening that penetrates the substrate.

The invention discloses an ultrathin vibration reduction loudspeaker and a manufacturing method thereof, the ultrathin vibration reduction loudspeaker comprises a magnetic circuit assembly and a sound production assembly, the magnetic circuit assembly and the sound production assembly are connected through a support, and the magnetic circuit assembly comprises a magnetic bowl and a central magnet arranged in the middle of the magnetic bowl. The sound production assembly comprises a main sound production unit and an auxiliary sound production unit which are arranged on the two sides of the support, the main sound production unit comprises an active sound film and a voice coil driving the active sound film to vibrate, the sound production assembly further comprises a damping piece arranged between the support and the magnetic bowl, and the inner side of the damping piece is fixedly connected with the magnetic bowl. The outer side of the damping sheet is fixedly connected with the bracket; the auxiliary sound production unit comprises a damping compression ring and a passive sound film, and through comprehensive utilization of the passive sound film, the plate-shaped loudspeaker can realize good balance among lightening, thinning, light weight, vibration reduction and sealing performance while ensuring the sound production effect.

The utility model discloses a waterproof breathable sound transmission membrane for a Bluetooth earphone in the technical field of Bluetooth earphones, which comprises a waterproof breathable sound transmission membrane and a first double faced adhesive tape, the top of the waterproof breathable sound transmission membrane is provided with the first double faced adhesive tape, the top of the first double faced adhesive tape is provided with a first dustproof net, and the first dustproof net and the first double faced adhesive tape are fixed through bonding. A plurality of through holes are formed in the supporting block; a third double-faced adhesive tape is arranged at the bottom of the supporting block; a second dustproof net is arranged at the bottom of the third double-faced adhesive tape; and the second dustproof net and the third double-faced adhesive tape are fixed through bonding. Through arrangement of a first double faced adhesive tape, a first dustproof net, a second double faced adhesive tape, a supporting block, a through hole, a third double faced adhesive tape and a second dustproof net, the dustproof function of the device is achieved, dust can be prevented from being accumulated on the surface of a sound transmission film, the sound transmission effect of the device is improved, and use is more convenient.

This utility model discloses a PTFE waterproof and sound-permeable membrane, belonging to the technical field of microphone waterproof and sound-permeable membranes. It includes a bottom ring, with an installation groove on the inner side of the top of the bottom ring. A limiting ring is fixed to the top of the bottom ring, and blocks are evenly arranged on the inner sidewall of the limiting ring. A pressure ring is slidably connected inside the limiting ring, and limiting blocks matching the size of the blocks are evenly arranged on the outer side of the pressure ring. A PTFE waterproof and sound-permeable membrane body is disposed between the pressure ring and the bottom ring, and a protective component is provided on the top of the PTFE waterproof and sound-permeable membrane body. This utility model can fix the waterproof and sound-permeable membrane by staggered insertion and rotational alignment of the pressure ring and the blocks inside the limiting ring, achieving springless fixation. This structure avoids the high-precision manufacturing difficulties of spring installation, and the engaging components are easy to disassemble for maintenance, eliminating the risk of damage to minor parts, reducing mass production costs and maintenance difficulty, and improving structural reliability and practicality.

The invention discloses a sensor and electronic equipment. The sensor comprises a waterproof sound transmission film, the sensor is provided with a sound hole, and the waterproof sound transmission film covers the sound hole; the waterproof sound transmission membrane is made of fluoride-free fibers, and the line diameter of the fluoride-free fibers is larger than or equal to 0.1 mu m and smaller than or equal to 1 mu m, so that the signal-to-noise ratio loss of the sensor is reduced; and the thickness of the waterproof sound transmission film is smaller than or equal to 20 microns, so that the sound loss amount and the signal-to-noise ratio loss of the sensor are reduced.

The application relates to a waterproof sound-permeable film assembly, which comprises a first adhesive member, a second adhesive member and a sound-permeable film, the sound-permeable film is bonded between the first adhesive member and the second adhesive member, the edge area of the first adhesive member is bonded with the edge area of the second adhesive member, the area where the first adhesive member and the second adhesive member are directly bonded is a rubber-coated area, and the side of the sound-permeable film is isolated from the outside through the rubber-coated area; the width of the rubber-coated area is not less than 10 times the thickness of the sound-permeable film, and the width of the rubber-coated area is not more than 25% of the width of the first adhesive member. The technical scheme of the application sets the rubber-coated area, so that the sound-permeable film is not easy to delaminate, and the bonding strength of the overall structure is improved; secondly, the rubber-coated width is set to be not less than 10 times the thickness of the sound-permeable film and not more than 25% of the width of the first adhesive member, so that the waterproof sound-permeable film assembly not only guarantees air tightness, but also has good waterproofness.