305results 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 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.

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.

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.

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 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.

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.

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 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.

There is disclosed a mobile terminal comprising a body; a display unit disposed on a front surface of the body and having elasticity; a vibration receiver attached to a rear surface of the display unit; a speaker having a higher output than the vibration receiver and configured to transmit sound to a distant location; and a controller configured to vibrate the display unit by driving the vibration receiver according to an audio signal.

The present invention relates to the technical field of acoustic wave imaging, and in particular to a method and device for generating a synthetic vortex acoustic field having a super-mode number. The method in the present invention comprises the following steps: (1) constructing a transducer array consisting of N transducer units, the transducer units emitting acoustic fields to generate initial acoustic fields; (2) changing the positions of the transducer units at the same time and phases of emitting the acoustic fields by the transducer units, generating one acoustic field at every change, changing for s times, and generating s acoustic fields, wherein the manner in which the positions of the transducer units are changed is to integrally rotate the transducer array; and (3) superimposing the initial acoustic fields and the s acoustic fields generated in step (2) to obtain a synthetic vortex acoustic field having a super-mode number, wherein N and s are integers greater than 0, and N*s is not less than 4. The method and device for generating the vortex acoustic field in the present application are used for underwater communication or acoustic imaging, and can also achieve the effects of improving channel capacity and / or improving the resolution, and has good application prospects.

There is herein presented an acoustic device comprising an acoustic transducer, an acoustic channel proximate to the acoustic transducer and a membrane cover spanning the acoustic channel; wherein upon the installation of the membrane cover the signal to noise ratio (SNR) of the acoustic transducer is reduced by less than 1.5 dB as measured using the method described herein; and wherein the SNR of the acoustic device is reduced by less than 1.0 dB after contact of the membrane cover with water.

An ultrasonic liquid level sensor probe using a piezoelectric plate FPC module which has a simple configuration, is small and easy to handle, requires no wiring of lead wires, and is easily assembled into a probe. For the piezoelectric plate FPC module, there are a single-sided arrangement, in which an FPC is bonded to one-side surfaces of two or more piezoelectric plates, and a double-sided arrangement, in which two or more piezoelectric plates are sandwiched between two FPCs that are an FPC for individual electrodes and an FPC for a common electrode. The ultrasonic liquid level sensor probe has the piezoelectric plate FPC module stored in a double pipe serving as an insertion portion of the ultrasonic liquid level sensor probe.

A camera system having a camera housing, a loudspeaker grille, a housing lip, and a loudspeaker system. The camera housing has an exterior that form sides of the camera housing. A loudspeaker grille is disposed within the camera housing. The loudspeaker grille has an exterior surface that is substantially flush with the exterior of the camera housing. A housing lip is located on an interior of the camera housing. A loudspeaker system is integrated into the camera housing. A waterproof membrane is configured to prevent moisture in the interior of the camera housing, and a support structure is located between the waterproof membrane and the loudspeaker system. The support structure has a rectangular outer perimeter. The housing lip is configured to mechanically support the loudspeaker system, the loudspeaker grille, the waterproof membrane, and the support structure such that a loudspeaker cavity exists between the loudspeaker grille and the waterproof membrane.

The invention discloses a curved disc transducer with a concave boundary for a linear array, and belongs to the technical field of underwater acoustic engineering and electroacoustic conversion. The transducer comprises piezoelectric ceramics and a metal shell, and the core of the transducer is that a plurality of smooth transition concave structures are arranged on the circumferential boundary of the metal shell. And the at least one pair of recesses are symmetrically distributed along the axis and are used for penetrating through a bearing rope and a wire of the linear array. According to the invention, the structure of the transducer is optimized, and the wiring and positioning functions which can be realized only by an additional skeleton traditionally are integrated on the transducer shell, so that the radial size and the overall weight of the linear array are remarkably reduced, the manufacturing cost and the structural complexity are reduced, and meanwhile, good acoustic performance is ensured.

A hydrophone may be deployed in a wellbore to collect sounds that may be used to identify whether a wellbore is safe to operate. This hydrophone may include acoustic sensors that sense noise generated by motion of the hydrophone and may sense noise indicative of a defect that could lead to catastrophic failure of a wellbore. Noise generated by movement of the hydrophone may be classified as "road noise" and noise associated with wellbore defects may be classified being "signals of interest." The presence of "road noise" may interfere with the collection of "signals of interest" and because of this, evaluations performed on data that includes "road noise" may result in inaccurate determinations and a decrease in safety. As such, systems and methods of the present disclosure are directed to improving safety of a wellbore by removing "road noise" more effectively while increasing quality of "signals of interest."

The invention provides a liquid cavity type underwater acoustic transducer and a design method of the transducer. The transducer comprises a piezoelectric ceramic ball, a positive electrode lead, a negative electrode lead, a prestress layer, a first decoupling sealing element, a second decoupling sealing element, a metal connecting rod, a watertight layer, a spherical liquid cavity and a metal sealing piece. A positive electrode lead and a negative electrode lead are respectively led out of the inner and outer walls of the piezoelectric ceramic ball; a spherical liquid cavity is formed in the piezoelectric ceramic ball and is used for accommodating liquid; the prestress layer coats the outer wall of the piezoelectric ceramic ball; the watertight layer covers the outer side of the prestressed layer; a liquid inlet and a liquid outlet are formed in the metal connecting rod, the liquid inlet is located outside the watertight layer, and the liquid outlet is communicated with the spherical liquid cavity. The transducer disclosed by the invention can still work normally under a large-depth working condition. Liquid cavity vibration is introduced into the spherical transducer, and the resonance mode of the transducer is increased. The antenna still has the advantages of being free of horizontal directivity, large in vertical directivity and the like at a high frequency band.

The utility model discloses a waterproof external sound box, and relates to the technical field of outdoor sound equipment, the waterproof external sound box comprises a sound equipment body, one side of the sound equipment body is fixedly connected with a support, the top end of the support is fixedly connected with a rain baffle, the rain baffle is located above the sound equipment body, and the bottom end of the rain baffle is fixedly connected with a rain cover. According to the above structure, the support is installed on the sound box body, the rain baffle is installed on the top of the support, the rain sensor is installed on the top of the rain baffle, the rain cover is installed at the bottom of the rain baffle, and when the rain sensor monitors rainwater, the rain cover can fall down to wrap the sound box body. Therefore, people do not need to worry about damage of sudden rainfall to sound equipment, people can enjoy outdoor activities and music more securely, rainwater is prevented from entering the sound equipment to cause erosion of internal elements, equipment failure and damage caused by water inflow are reduced, and the service life of the sound equipment is prolonged.

Provided is a waterproof assembly for a sound transmission hole of an acoustic device. The waterproof assembly includes a waterproof membrane, a buffer member, and a support member. The waterproof membrane is configured to allow air molecules to pass through and block water molecules from passing through. The buffer member includes an adhesive surface. The adhesive surface is adhesive so as to adhere the waterproof assembly to a target surface after being subjected to an external pressure. The support member is located between the waterproof membrane and the buffer member, and configured to reduce a degree of wrinkling of the waterproof membrane when the waterproof assembly is assembled. By providing the support member and the buffer member, the waterproof membrane is less prone to wrinkling and deformation during assembly into the acoustic device, thereby maintaining excellent acoustic performance and waterproof effect.

To provide a laminate type composite vibrator that is suitable for mounting in a limited space and widens an in-use frequency band.SOLUTION: A laminate type composite vibrator 400 includes a first composite vibrator 41 and a second composite vibrator 42 laminated on an acoustic radiation surface 40. The second composite vibrator 42 functions as an acoustic matching layer at an in-use frequency of the first composite vibrator 41.SELECTED DRAWING: Figure 1

Provided is an electroacoustic transducer capable of improving the reliability of a drive circuit and the sound quality. The electroacoustic transducer includes: a vibration unit constituting a part of a partition defining a cabin space of a vehicle; a magnetic circuit on an outside of the cabin space; and an electrical element configured to process an electrical signal for vibrating the vibration unit. The electrical element is located in the cabin space.