591results about "Transducers for subaqueous use" patented technology

The present disclosure relates to a speaker device. The speaker device may include an ear hook, a core housing for accommodating an earphone core, and a circuit housing for accommodating a control circuit or a battery. The ear hook may include a first plug end and a second plug end. The ear hook may be surrounded by a protective sleeve which may be made of an elastic waterproof material. The ear hook may be elastic, and a position of the core housing relative to the ear hook may be changed according to an elastic deformation of the ear hook, thereby the core housing may fit a user in front of or behind an ear of the user. The circuit housing may be fixed to the second plug end. The control circuit or the battery may drive the earphone core to vibrate to generate a sound.

The invention belongs to the technical field of acoustic signal transmission, and particularly relates to a preparation method of an underwater sound source based on cross-water and cross-air metasurface packaging, and the method comprises the steps: obtaining a waterproof cavity with a cross-water and cross-air metasurface through the target frequency range of the underwater sound source and the boundary dimension optimization of an underwater sound source element; one or more air loudspeakers are packaged in a waterproof cavity to be assembled into an underwater sound source element, and a plurality of underwater sound source elements are arrayed according to the requirement of transmitting underwater sound beams. The underwater sound source prepared by the invention has a certain broadband characteristic and adjustable directivity, and can realize cross-medium sound wave transmission more efficiently. In addition, the invention also discloses an underwater sound source based on cross-water-air super-structure surface packaging.

The present invention relates to multi-stake underwater transducers and arrays for the generation and reception of sound waves in water. The invention provides the design and fabrication of compact piston-type underwater transducers of low-to-mid operating frequency made of piezoelectric single crystals without the need of any pre-stress mechanism. The invention uses a multi-stake pipe-like motor section made of piezoelectric single crystals of high transverse mode piezoelectric coefficients and low acoustic impedance, and small-diameter and light head mass(es). The present invention also discloses various means of increasing the bandwidth of the multi-stake underwater transducers as well as derivative transducers and arrays made of them, including compact 2D and 3D omni-directional transducers, planar, conforming and shaped arrays of various designs, high-density arrays and low-drop-down-ratio parametric arrays of either single or dual frequency bands.

A filtration apparatus and an electronic device are provided to resolve the problem of housing body sealing failures caused by particulate matter in water damaging the waterproof membrane sealing the electronic device. In the filtration apparatus and electronic device, a first filter layer is disposed on an outer side of an outer surface of a housing body, a second filter layer is disposed between the outer surface and the first filter layer, and both the first filter layer and the second filter layer cover function holes on the housing body.

The invention belongs to the technical field of underwater acoustic transducers, and relates to a low-frequency underwater fluid sound production device which comprises a power assembly, a rotating assembly and a transduction assembly which are connected in sequence. The transduction assembly comprises a center shaft and a multi-stage blade type transducer connected to the center shaft in series. The power assembly converts fuel chemical energy into fluid kinetic energy so as to drive the rotating assembly. The rotating assembly rotates under the impact of the power assembly and drives the central shaft of the transduction assembly to rotate so as to convert fluid kinetic energy into mechanical kinetic energy; a blade type transducer of the transduction assembly is linked with the center shaft, so that a blade structure of the blade type transducer rotates and swings, water flow with the flow periodically changing along with time is generated, low-frequency sound radiation is formed, mechanical kinetic energy is converted into sound energy, and low-frequency underwater fluid sound production is achieved. According to the invention, wide-frequency-band and high-power radiation can be realized at the same time, and the sound source intensity is high.

An image capture device includes a housing that defines a cavity and an aperture positioned within the cavity and an audio device disposed within the housing at a location of the aperture. The image capture device includes stanchions that extend outward from the cavity and a cover coupled to the stanchions. The cover is free of contact with the housing.

The invention discloses a cross-medium wearable audio transmission system and a transmission method thereof, which are suitable for audio communication scenes in an air and water body junction environment such as a natatorium. The system comprises a shore transmitting terminal and an underwater receiving earphone, and adopts a blue-green light wave band as a transmission carrier to realize cross-medium wireless transmission of audio signals. The transmitting terminal comprises an audio preprocessing module, a modulation and driving module and a coarse-fine composite light beam alignment module; the receiving earphone comprises an optical receiving module, a posture sensing and aligning module, a signal processing module and a bone conduction audio output unit. According to the system, through a dynamic attitude compensation and light beam alignment mechanism, the audio transmission rate greater than or equal to 1Mbps in a 10-meter range is realized, the error rate is less than or equal to 1 * 10 <-6 >, and the transmission delay is less than 50ms. The method has the advantages of high communication quality, strong anti-interference capability, good wearable performance and the like, and is suitable for scenes of underwater training, voice guidance, immersive audio playing and the like.

The embodiments of the present application belong to the technical field of terminal equipment, and specifically relate to a filtering device and an electronic device. The embodiments of the present application aim to solve the problem that particles in the water can easily damage the waterproof membrane, causing the shell seal to fail. In the filtering device and the electronic device provided by the present embodiment, the first filter layer is arranged on the outside of the outer surface of the shell, and the second filter layer is arranged between the outer surface and the first filter layer, and the first filter layer and the second filter layer both cover the functional holes on the shell. With such an arrangement, the first filter layer and the second filter layer can filter the water entering the functional hole to prevent impurities such as particles in the water from entering the functional hole; in a deep water environment, impurities and other particles can be prevented from damaging the waterproof membrane, thereby improving the waterproof performance of the electronic device in a deep water environment, that is, improving the ability of the electronic device to withstand water pressure and increasing the water depth of use of the electronic device.

To provide an underwater sound wave generator that generates a loud sound that can be heard by humans even in water and plays a musical scale like a musical instrument so that humans do not feel uncomfortable. 【Solution means】The underwater sound wave generator 100 includes a housing 10 that is partially open and has a shape capable of holding a gas 20 in water, and a vibrating portion disposed inside the housing 10. The sound wave 90 generated by the vibration of the vibrating portion propagates into the water through the housing 10 and the water surface 30 located at the open portion 12 of the housing 10. The vibrating portion includes a sounding board 112, and a sound wave 90 is generated by applying an impact to the sounding board 112.

A speaker device is disclosed in this application. The speaker device includes a magnetic guiding plate, a magnetic circuit module and a vibration module. The magnetic circuit module includes a main magnet and an auxiliary magnet, wherein the main magnet and the auxiliary magnet are disposed on the magnetic guiding plate, and the auxiliary magnet is disposed on the outer side of the main magnet. The vibration module includes a bracket, a vibration component and a voice coil, wherein the bracket is disposed on the auxiliary magnet, the vibration component is disposed on the bracket and is located on the magnetic circuit module, the voice coil is disposed under the vibration component, and is located between the main magnet and the auxiliary magnet.

The invention provides a vibration damping type self-contained hydrophone system. The vibration damping type self-contained hydrophone system comprises a hydrophone system, a rubber vibration damping funnel, a rubber vibration damper, a flow guide cover and a mounting bracket, according to the utility model, the vibration damping structure design of combining the rubber vibration damping funnel and the triaxial rubber vibration damper is adopted, the problem that the detection precision is influenced by the vibration of the mounting platform is well solved, and meanwhile, the resonant frequency of the mounting bracket is reduced and the lower limit of the detectable signal frequency band of the hydrophone is broadened due to the structural design and use of the metal / polymer damping composite material.

Electronic equipment comprises a shell and a functional component, the functional component is connected to the shell, the electronic equipment is provided with a channel, one end of the channel penetrates through one side of the electronic equipment, at least part of the shell forms at least part of the inner wall of the channel, and at least part of the functional component forms at least part of the inner wall of the channel. A nano hydrophobic membrane is arranged on the inner wall of the channel, and the thickness of the nano hydrophobic membrane on the functional part is smaller than that of the nano hydrophobic membrane on the shell. In the application, the thickness of the nano hydrophobic membrane on the functional component can be smaller than that of the nano hydrophobic membrane on the shell, so that the part, sensitive to external liquid, on the functional component can isolate the liquid through the nano hydrophobic membrane, and meanwhile, the nano hydrophobic membrane can be prevented from influencing the performance of the functional component.

The invention provides a circular tube type underwater acoustic transducer thermal control structure based on a thermal convection mechanism. The circular tube type underwater acoustic transducer thermal control structure comprises a piezoelectric ceramic circular tube, a heat conduction structural body, an upper cover plate hard decoupling material, a lower cover plate hard decoupling material, a heat conduction upper cover plate, a heat conduction lower cover plate and a transducer watertight layer, a positive electrode lead and a negative electrode lead are respectively led out from the piezoelectric ceramic circular tube, a heat dissipation coating is arranged on the inner cylindrical surface of the piezoelectric ceramic circular tube, and a transducer watertight layer is coated on the outer cylindrical surface of the piezoelectric ceramic circular tube; and a heat absorption coating is arranged on the outer cylindrical surface of the heat conduction structural body. According to the invention, heat generated by the piezoelectric ceramic circular tube is conducted to the heat conduction structural body and then is transferred to a water environment through the heat conduction upper cover plate and the heat conduction lower cover plate, so that thermal control of the circular tube type underwater acoustic transducer is realized based on a heat convection mechanism, the heat dissipation capability of the circular tube type underwater acoustic transducer is improved, and the service life of the circular tube type underwater acoustic transducer is prolonged. The long-time and high-power working capacity of the transducer is improved, and the weight and volume loads generated by the transducer are controllable.

An electronic device includes a substrate, a sensor, an inner cover, a water proof member, and an outer cover. The sensor is disposed on the substrate. The inner cover is disposed on the substrate and covers the sensor. The inner cover includes an opening. The water proof member is disposed on the inner cover and covers the opening. The outer cover is disposed on the substrate and covers the inner cover, so that a drainage chamber is formed between the inner cover and the outer cover. The drainage chamber communicates with outside through a first hole and a second hole. The first hole and the second hole are staggered with the opening. A portion of the drainage chamber between the first hole and the second hole acts as a drainage channel. A length of the drainage channel is greater than a diameter of the opening.

The invention provides a resonant bionic cilia vector hydrophone based on a quartz tuning fork and an underwater acoustic system, and relates to the technical field of micro-mechanical electronics. A vibration detection mechanism in the hydrophone comprises two quartz tuning forks located in a first axial direction and two quartz tuning forks located in a second axial direction, the first axial direction is perpendicular to the second axial direction, one end of each quartz tuning fork is fixed, and the other end of each quartz tuning fork is connected with a vibration acquisition mechanism; and the vibration acquisition mechanism is connected with the quartz tuning forks and is used for driving the two quartz tuning forks in the same axial direction to generate symmetrical frequency deviation under the action of sound waves. According to the embodiment of the invention, the excellent frequency stability and strain sensitivity of the double-end fixed tuning fork can be utilized to realize efficient conversion of sound signals and generation of corresponding electric signals, digital signal output can be conveniently realized, high-sensitivity detection of the sound signals can be effectively realized, the influence of common-mode signals can be inhibited, the anti-interference performance is good, and the detection precision is high. And the underwater sound detection effect is greatly improved.

An acoustic device is provided. The acoustic device comprises a housing, a waterproof assembly, an acoustic assembly, and a sealing member. The housing includes an accommodation cavity provided with a first sound transmission hole. The waterproof assembly is within and in sealed connection with the accommodation cavity, and covers the first sound transmission hole to prevent liquid from contacting an acoustic sensor. The acoustic assembly includes the acoustic sensor, the acoustic assembly being disposed on a side of the waterproof assembly away from the first sound transmission hole and in sealed connection with the waterproof assembly, and a first gap being formed between the acoustic assembly and the accommodation cavity. The sealing member seals the first gap to fix the acoustic assembly and prevent the liquid from entering an interior space of the housing through the first gap.

The invention relates to an underwater acoustic transducer which can resist long-term work under the condition of deep sea high water pressure, is high in sensitivity, wide in band, low in noise and high in electromagnetic interference resistance, is used in deep sea detection and communication sonar systems, and solves the problems that an existing underwater acoustic transducer is low in receiving sensitivity along with increase of water pressure, poor in long-term work corrosion resistance and low in cost. And noise of the hydrophone and external electromagnetic interference cause signal interference. A novel high polymer material is adopted to reduce acoustic impedance, enhance the coupling effect with seawater and reduce sound wave reflection loss. Meanwhile, by optimizing the internal structure design, the stability and durability of the device under the deep sea high pressure condition are ensured. And the hydrophone shell is made of an alloy material with good corrosion resistance, so that the hydrophone shell is prevented from being corroded in a marine environment for a long time, and the service life is prolonged. By improving the design and manufacturing process of the transducer, the transducer can cover acoustic signals in a broadband range, and the multi-spectrum requirement of a deep sea detection and communication system is met. Advanced noise suppression technology and shielding measures are adopted, noise of the hydrophone is effectively reduced, external electromagnetic interference resistance is improved, and it is guaranteed that high-quality acoustic data are obtained in a complex deep sea environment. In conclusion, the invention provides the hydrophone which is excellent in working performance in the deep sea high-pressure environment, has the characteristics of high sensitivity, broadband response and the like, can effectively resist the influence of a severe environment, and provides key technical support for deep sea detection and a communication sonar system.

The present disclosure discloses an acoustic output apparatus including at least one acoustic driver, a controller, and a supporting structure. The at least one acoustic driver may be configured to output sounds through at least two sound guiding holes. The at least two sound guiding holes may include a first sound guiding hole and a second sound guiding hole. The controller may be configured to control a phase and an amplitude of the sounds generated by the at least one acoustic driver using a control signal such that the sounds output by the at least one acoustic driver through the first and second sound guiding holes have opposite phases. The supporting structure may be provided with a baffle and configured to support the at least one acoustic driver such that the first and second sound guiding holes are located on both sides of the baffle.

The invention provides an underwater sounder air chamber air pressure balance system, which comprises deck control equipment, a composite function towing cable and underwater equipment, and is characterized in that the deck control equipment comprises a console and an air cylinder, the composite function towing cable comprises an air pipe and a cable, and the underwater equipment comprises a depth sensor, an air pressure sensor and a balance air bag; after the underwater sounder dives into water, the electric control air valve is controlled by the control console to be communicated with the air pipe in the composite function towing cable, then signals of the depth sensor and the air pressure sensor are continuously received, and the control console makes a decision according to the two signal values and judges whether to control the air bag air valve in the underwater sounder to be opened for inflation or not. Compared with the prior art, the air chamber air pressure balance system provided by the invention can expand the normal working depth of the existing sounder from a ten-meter level to a hectometer level, and has the effects of wide depth adjustment range, sensitive control of an air pressure value in an underwater working state and strong adaptive capacity of external water pressure fluctuation.

A pressure-resistant electromagnetic sound transducer (20) with the following features is disclosed: - a sound transducer module (22); - a watertight housing (24) which has a receptacle (26) for the sound transducer module (22); - a pressure plate (28) that covers the sound transducer module (22) in such a way that a cavity (32) is formed between a vibration element (30) of the sound transducer module and the pressure plate (28), which enables sound propagation; - wherein the pressure plate (28) has a plurality of openings (34) through which the sound can pass through the pressure plate (28); - a grid (36) covering the openings (34) and having openings (38) that have a smaller diameter than the openings (34) of the plurality of openings (34); - a flexible membrane (40) stretched over the grid (36) in such a way that under normal pressure a space (42) is formed between the membrane (40) and the grid (36) and under water pressure the membrane (40) rests on the grid (36); - a lid (44) designed to protect the membrane (40) against rough, external mechanical impact and to allow the flexible membrane (40) to vibrate in order to emit sound through holes in the lid (44).

The invention discloses a sensitization type MEMS hydrophone and a preparation method thereof. The sensitization type MEMS hydrophone comprises a sensitization type elastic substrate, a lower electrode assembly, a PZT piezoelectric sensitive assembly, an upper electrode assembly and an insulating material layer. The lower electrode assembly, the PZT piezoelectric sensitive assembly and the upper electrode assembly are sequentially arranged on the surface of the sensitization type elastic substrate from bottom to top, and the insulating material layers are arranged on the surface of the sensitization type elastic substrate, in the lower electrode assembly, in the PZT piezoelectric sensitive assembly and in the upper electrode assembly respectively. Therefore, the interior of the lower electrode assembly, the interior of the PZT piezoelectric sensitive assembly and the interior of the upper electrode assembly are insulated. The lower electrode assembly and the upper electrode assembly are led out through conductive cables and connected in series, electric signals generated by the PZT piezoelectric sensitive assembly are output through the lower electrode assembly and the upper electrode assembly, and signal measurement is achieved through a circuit and a test system. The MEMS hydrophone has the advantages of being compact in structure, high in sensitivity, high in anti-interference capacity and the like, and the application range of the MEMS hydrophone is widened.

The invention belongs to the technical field of underwater acoustic transducers, and particularly relates to a high-performance transceiving integrated cylindrical array underwater acoustic transducer, which comprises a cylindrical array sensitive element, a rigid prism supporting structure, a sound absorption layer and a waterproof sound transmission layer, and is characterized in that the cylindrical array sensitive element comprises a sound wave transmitting array unit and two sound wave receiving array units; the two sound wave receiving array units are located at the upper end and the lower end of the sound wave emission array unit respectively, the sound wave emission array unit is bonded to the middle of the outer side of the rigid prism supporting structure, and the two sound wave receiving array units are bonded to the upper end and the lower end of the outer side of the rigid prism supporting structure respectively. According to the invention, the system structure can be effectively simplified, the environmental average noise is suppressed, the signal-to-noise ratio and directivity are improved, the system has the functions of receiving and transmitting integration, horizontal 360-degree omnidirectional and omnidirectional rotary scanning transmission, multimode coupling is realized, the bandwidth is expanded, the sending voltage response is increased, and the receiving sensitivity is increased.

Sound-permeable cover (120) for an acoustic device (102), wherein the cover comprises: a shrunk membrane material having an acoustic insertion loss of less than 6 dB at 1 kHz and a water inlet pressure (WEP) of at least 9.8 kPa, wherein the shrunk membrane material has a microstructure comprising serpentine fibrils and wherein the serpentine fibrils have a width of about 1.0 micron or less.

The invention belongs to the field of underwater acoustic transducers, and particularly relates to a low-frequency underwater acoustic transducer with a double-opposite-shore signal excitation function and a method, the low-frequency underwater acoustic transducer comprises a transducer body, the top end of the transducer body is fixedly connected with a wire, the wire is fixedly connected with a fixing ring, the fixing ring is fixedly connected with a fixing plate, and the fixing plate is fixedly connected with the transducer body. The fixing plate is fixedly connected to the top end of the fixing shell, four sets of connecting springs are fixedly connected to the inner wall of the fixing shell, the bottom ends of the connecting springs are fixedly connected with the inner wall of a circular groove, the circular groove is formed in the top end of the transducer body, and a shielding mechanism is arranged below the transducer body. Through the structural design of the shielding mechanism, the function of shielding the bottom end of the transducer body is achieved, so that when the transducer body is placed underwater, sundries on the water surface cannot be attached to the transducer body, and when the transducer body needs to work, the baffle can be opened to prevent the transducer body from being shielded.

The utility model relates to a high-frequency transmitting transducer capable of measuring internal temperature in real time. The high-frequency transmitting transducer comprises a ceramic shell platinum resistor and a longitudinal oscillator, the ceramic shell platinum resistor is arranged at the central position of the high-frequency transmitting transducer planar array, the whole longitudinal vibrator is trumpet-shaped, and the center of a gap space between trumpets is also the central position of the high-frequency transmitting transducer; the number of the ceramic shell platinum resistors is one, specifically, the ceramic shell platinum resistors are arranged behind the front cover plate at one end of the longitudinal vibrator in the center position and in the gap between the piezoelectric ceramics, epoxy resin or 2401 instant adhesive is used for fixing every two ceramic shell platinum resistors, and the other end of the piezoelectric ceramics is further provided with a rear cover plate. According to the high-frequency transmitting transducer, the ceramic shell platinum resistor is placed in the gap between the longitudinal vibrators without changing the original structure of the transducer, and the internal temperature of the transducer is tested in real time by leading the internal core wire of the watertight cable of the transducer to the dry end.

The resonator array panel includes a perforated first sheet, a second sheet, and a resonator core. The perforated first sheet includes a first sheet body. The second sheet includes a second sheet body. The second sheet body includes a second outer surface and a second inner surface. The first resonator core is disposed between the perforated first sheet and the second sheet. The first resonator core includes a first plurality of sidewalls. The first plurality of sidewalls form a first plurality of resonators between the perforated first sheet and the second sheet. The first plurality of resonators includes a first resonator. The first resonator includes a first viscoelastic body disposed within a first resonator cavity.

This invention provides a waterproof microphone and electronic device. The waterproof microphone includes a first substrate, a sound hole disposed on the first substrate, and a waterproof component disposed on the outside of the first substrate. The waterproof component includes a supporting base, a rigid sheet disposed on the supporting base, and a waterproof membrane located on the side of the rigid sheet closer to the first substrate. The supporting base is disposed on the first substrate such that the rigid sheet and the waterproof membrane cover the area where the sound hole is located. This invention improves the waterproof performance of the waterproof microphone.

The present invention discloses an experimental method for monitoring and quantifying the acoustic behavioral responses of fish, comprising: an experimental system, which includes: a circulating water tank for placing a fish school; a 3D optical sensor for obtaining a set of spatial coordinates of the fish school; a plurality of first acoustic wave transmitters for simulating an underwater dynamic acoustic environment; and a plurality of second acoustic wave transmitters for directionally transmitting acoustic waves, the directivity of which is controlled by the set of spatial coordinates of the fish school. The experimental system of the present invention integrates an acoustic stimulation emission system, a circulating water temporary culture system, and a fish behavior recording system, providing an efficient, accurate, and comprehensive means for studying the acoustic stimulation behavior of fish. It is used to monitor, evaluate, and quantify the three-dimensional behavioral responses of experimental fish schools under scenario acoustic stimulations of different intensities and types in conditions simulating natural aquaculture sea conditions, and to characterize their kinematic parameters. When no experiment is being carried out, the experimental fish can also be stably temporarily cultured in the experimental system to achieve stable and real-time regulation of water quality.

The utility model provides a waterproof and dustproof sound box, and relates to the technical field of sound boxes. The waterproof and dustproof sound box mesh enclosure structure comprises a sound box body, one side of the sound box body is provided with a dustproof net plate, one side of the dustproof net plate is fixedly connected with a convex frame, one side of the convex frame is provided with a fixed clamping groove, a rubber strip is arranged in the fixed clamping groove, and four sides of the rubber strip are provided with a plurality of limiting holes. And sliding rods are arranged on the four sides of the convex frame. According to the waterproof and dustproof sound box mesh enclosure structure, a pressing frame drives a plurality of extrusion wheels to be away from a plurality of extrusion blocks, at the moment, a plurality of first reset springs are elastically reset, a plurality of extrusion blocks drive a plurality of connecting plates to reset towards a convex frame through a plurality of sliding rods, so that a plurality of limiting rods are clamped into a plurality of limiting holes, and installation of rubber strips is achieved; by means of the installation mode, the phenomenon that the rubber strip and the rubber groove deviate can be avoided, and meanwhile people can conveniently and rapidly disassemble the rubber strip and replace the rubber strip.

The present invention relates to a combined polarized ultra-low frequency curved disk transducer and a preparation method thereof. The two transducer components are opposed to each other with the radiation surface facing outward, and an air cavity is provided between the two transducer components. A connecting cable is provided for the two transducer components, and a combined polarization component is provided for any of the transducer components. The present invention combines tangential polarization with thickness polarization. On the basis of conventional thickness polarization, tangential polarization is added to compensate for the vibration displacement at the outer position to obtain a better vibration mode and a larger vibration displacement. By changing the distribution of the piezoelectric elements, the equivalent distribution space of the active driving material is increased. While reducing the resonant frequency of the curved disk transducer, it has a higher transmission voltage response and improves the transmission capability of the transducer. A new implementation method of tangential polarization is proposed to solve the short circuit problem between the element and the metal plate, ensure the adaptability of the vibration mode between the materials, and make the entire transducer have a better vibration mode.