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15 results about "Acoustic membrane" patented technology
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An acoustic membrane is a thin layer that vibrates and is used in acoustics to produce or transfer sound, such as a drum, microphone, or loudspeaker.
Waterproof sealing mechanism of microphone and electronic device
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.
Owner:HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO LTD
An online acoustic module with quick replacement of waterproof sound permeable membrane structure
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.
Owner:ZHEJIANG HONGPU TECH CORP LTD
A highly sensitive immersion-type detection device and method for detecting ultrasonic signals in liquids
ActiveCN121521247BExtend the life cycleavoid pollutionSubsonic/sonic/ultrasonic wave measurementUsing wave/particle radiation meansEngineeringAcoustics
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.
Owner:SOUTH CHINA UNIV OF TECH
Dual-mode audio coding system and dual-mode audio coding method
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.
Owner:GENERALPLUS TECH INC
An ultrathin composite acoustic membrane and automotive component
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).
Owner:JIANGSU FANHUA GLASS CO LTD
A PTFE waterproof and sound-permeable membrane
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.
Owner:SUZHOU JIDING ELECTRONIC TECH CO LTD
An ultrasonic isolation sound-permeable membrane device
ActiveCN224269331UAchieving the technical effect of isolationUltrasonic/sonic/infrasonic diagnosticsInfrasonic diagnosticsMembrane technologyAcoustic membrane
This application relates to the field of acoustic membrane technology, specifically to an ultrasonic isolation acoustic membrane device. The ultrasonic isolation acoustic membrane device includes a sub-connector detachably connected to a probe; a female connector detachably connected to the sub-connector; and a mounting chamber for installing the ultrasonic isolation acoustic membrane is provided within the sub-connector along its central axis. When the female connector is connected to the sub-connector, it presses the ultrasonic isolation acoustic membrane located within the mounting chamber. This application solves the technical problem that, in most hospitals, during B-ultrasound examinations, ultrasound probes are directly contacted with the skin after applying an ultrasonic disinfectant coupling agent, without any substantial isolation measures between the patient and the ultrasound probe, resulting in the risk of cross-infection within cavities, on the body surface, and during surgical interventions.
Owner:SHAANXI ZHICHEN MEDICAL EQUIP CO LTD
Multi-section acoustic packaging structure of PMUT ultrasonic transducer and optimization method thereof
This invention belongs to the field of ultrasonic sensing and microelectromechanical systems (MEMS) packaging technology, specifically relating to a multi-segment acoustic packaging structure and optimization method for a PMUT ultrasonic transducer. The multi-segment acoustic packaging structure for a PMUT ultrasonic transducer includes a base, a PMUT chip, and an acoustic cavity. The acoustic cavity includes a front cavity section, a tapered transition section, a conduit section, and a waterproof and acoustically permeable membrane. A first minimum gap is formed between the radiating surface of the PMUT chip and the bottom surface of the front cavity section; a second minimum gap is formed between the waterproof and acoustically permeable membrane and the outlet end of the conduit section. Furthermore, the acoustic cavity serves as either a transmitter or a receiver. When used as a transmitter, the depth of the front cavity section is greater than that of the front cavity section when used as a receiver, and the inner diameter of the conduit section is smaller than that of the conduit section when used as a receiver. This packaging structure, through optimization of geometric parameters and acoustic characteristics, achieves differentiated performance improvements for the transmitter and receiver, increasing the transmitted sound pressure and directivity, and expanding the bandwidth and receiving angle of the receiver.
Owner:CHENGDU RUISHENG MICRO-SENSE TECHNOLOGY CO LTD
An ultrasonic detection module
This invention discloses an ultrasonic detection module, comprising a housing, a waterproof and acoustically permeable membrane, a sealing sleeve, a MEMS sensor, a PCB circuit board, and a signal line. The housing has a cavity, and one end of the housing has a sound outlet communicating with the cavity. The sound outlet is frustoconical, with a larger outer opening and a smaller inner opening. The waterproof and acoustically permeable membrane is attached to the inner opening of the sound outlet to seal it. The sealing sleeve is fixedly disposed at the inner opening of the sound outlet, enclosing the waterproof and acoustically permeable membrane and the MEMS sensor. The MEMS sensor is fixedly disposed within the cavity, passing through the sealing sleeve and positioned opposite the waterproof and acoustically permeable membrane, for transmitting and receiving ultrasonic signals. The PCB circuit board is fixedly disposed within the cavity and electrically connected to the MEMS sensor for processing ultrasonic signals. The signal line connects to the PCB circuit board and extends out of the housing for external communication. This invention aims to improve the module's sealing and protection capabilities and detection accuracy, and to achieve a miniaturized design.
Owner:AUDIOWELL ELECTRONICS GUANGDONG
An installation device of an ultrasonic probe isolation acoustic transparent film
ActiveCN224291991UUltrasonic/sonic/infrasonic diagnosticsSurgical furnitureMembrane bodiesAcoustic membrane
Owner:CANGZHOU YONGKANG MEDICAL DEVICES
An ultrasonic probe and ultrasonic beauty device
This invention belongs to the field of ultrasonic medical aesthetics technology, specifically relating to an ultrasonic probe and an ultrasonic beauty instrument. The ultrasonic probe includes a base and a cooling system. The base has several outwardly extending branches, and each branch has at least one transducer for emitting ultrasonic waves. Each transducer is attached to an acoustic membrane. The cooling system is connected to the base and is used to cool the transducers and the acoustic membrane. This invention uses an ultrasonic array to emit parallel ultrasonic waves for face-to-face treatment of the skin, treating an area of several centimeters in size at a time, thus improving treatment efficiency. The addition of a cooling system cools the skin surface, preventing burns and increasing safety during treatment.
Owner:SBT ULTRASONIC TECH CO LTD
Acoustically transparent electrochemical vector hydrophone
ActiveCN117516696BSubsonic/sonic/ultrasonic wave measurementUsing electrical meansElectrochemical responseElectrolytic agent
The application discloses a kind of electrochemical vector hydrophone of sound transmission type, belong to underwater acoustic technical field, including sound transmission membrane, electrolyte, sound transmission channel, sensitive electrode, circuit and sealing shell;Sound transmission membrane is placed in the both sides of sound transmission channel;Electrolyte is used to provide the medium of electrochemical reaction, and sound wave can propagate in electrolyte;Sound transmission channel is filled with electrolyte inside, and sensitive electrode is embedded in the middle;Sensitive electrode includes a plurality of anode and a plurality of cathode, and electrolyte occurs electrochemical reaction in anode and cathode to generate current, and a plurality of flow holes are formed on electrode to make electrolyte pass smoothly;Circuit includes current-voltage conversion circuit and differential amplification circuit;Sealing shell, wrap inside structure and circuit of hydrophone, only expose sound transmission membrane, and internal gap is filled with insulating liquid.Sound wave signal is transmitted through sound transmission membrane, through sound transmission channel, acts on electrolyte near sensitive electrode, and causes the particle vibration of electrolyte near sensitive electrode.The application of very low frequency band is more reliable, and smaller in size.
Owner:AEROSPACE INFORMATION RES INST CAS
A sound film combination device for loudspeaker production
ActiveCN224481811USound filmAcoustic membrane
The utility model discloses a kind of acoustic membrane combination devices for loudspeaker production, it includes base, the upper surface of the base near right side edge is fixedly connected with support block, the inside of the support block is provided with suction device, the upper surface of the base is fixedly connected with shell, the shell is located support block left side, the inside of the shell is provided with fixing device. Through the above structure, the position of voice coil is fixed by fixing device, the acoustic membrane is sucked up by suction device, then drives its movement, close to voice coil, make it and voice coil bond, to solve, voice coil and acoustic membrane are unstable when bonding, lead to bonding effect is poor, affect the sound effect of loudspeaker.
Owner:HUIZHOU HAOYUAN TECH CO LTD