46 results about "Acoustic medium" patented technology

An acoustic matching structure is used to increase the power radiated from a transducing element with a higher impedance into a surrounding acoustic medium with a lower acoustic impedance. The acoustic matching structure consists of a thin, substantially planar cavity bounded by a two end walls and a side wall. The end walls of the cavity are formed by a blocking plate wall and a transducing element wall separated by a short distance (less than one quarter of the wavelength of acoustic waves in the surrounding medium at the operating frequency). The end walls and side wall bound a cavity with diameter approximately equal to half of the wavelength of acoustic waves in the surrounding medium. In operation, a transducing element generates acoustic oscillations in the fluid in the cavity. The transducing element may be an actuator which generates motion of an end wall in a direction perpendicular to the plane of the cavity to excite acoustic oscillations in the fluid in the cavity, and the cavity geometry and resonant amplification increase the amplitude of the resulting pressure oscillation. The cavity side wall or end walls contain at least one aperture positioned away from the center of the cavity to allow pressure waves to propagate into the surrounding acoustic medium.

The utility model discloses an ultrasonic therapeutic instrument, relates to ultrasonic therapeutic technical field, this ultrasonic therapeutic instrument includes liquid storage chamber structure, transducer subassembly and drive subassembly, liquid storage chamber structure is filled with sound conducting medium, transducer subassembly is provided in the liquid storage chamber structure, the drive subassembly is provided with the sound conducting medium, and the transducer subassembly is provided with the sound conducting medium. The transducer assembly comprises a transducer support and a transducer installed on the transducer support, the driving assembly comprises a movable push rod, the push rod is in transmission connection with the transducer support so as to drive the transducer assembly to move, the transducer support is provided with a water permeable hole, and the water permeable hole is communicated with the transducer support. The axis direction of the water permeable holes is parallel to the moving direction of the transducer support. Through the arrangement of the water permeable holes, the direct impact area of the sound conducting medium and the transducer support can be reduced, so that the motion resistance is reduced, and the problem of blockage of the transducer support in the motion process can be avoided.

This invention discloses a digital twin modeling method and system for vibration and noise in large-scale complexes, relating to the field of computer data processing technology. For the target complex, a sensor array is deployed and a twin is reconstructed to build a three-dimensional twin. The vibration and noise sources of the target complex are identified. Vibration modes are discretized and aggregated, and vibration equations for each aggregate class are mined. An explicit scene transfer framework is introduced to determine the explicit modeling requirements of the vibration and noise scene. Assisting the vibration equations, vibration and noise distribution based on acoustic medium boundaries is performed on the three-dimensional twin to generate a vibration and noise model. This invention addresses the technical problem in existing technologies where the level of detail and flexibility in vibration and noise modeling for complex architectural scenes is insufficient, leading to inadequate accuracy and adaptability in dynamic modeling. It achieves detailed vibration and noise modeling and dynamic visualization for complex architectural scenes, possessing significant advantages of high accuracy and high adaptability.

This invention relates to the field of seismic imaging technology and discloses a method, apparatus, equipment, and medium for forward modeling of seismic acoustic waves in a viscoelastic-acoustic (VTI) medium. The method includes: obtaining a desired Q value; calculating the viscoelastic velocity of the seismic acoustic wave based on the desired Q value; fitting parameters of a generalized standard linear body model; constructing a wave equation for the seismic acoustic wave in the VTI medium based on the generalized standard linear body model; and solving the wave equation for the seismic acoustic wave in the VTI medium using the finite difference method and the viscoelastic velocity. This invention solves the problem that traditional seismic simulations cannot simultaneously consider seismic anisotropy and seismic attenuation, significantly improving the accuracy and applicability of seismic simulations, as well as the accuracy of seismic simulations in complex terrain, geology, and oil and gas reservoir areas. It provides a foundation for subsequent high-precision seismic velocity modeling and seismic migration imaging.

The application provides an ultrasonic field detection device and an ultrasonic emission detection system. The detection device comprises a container for containing a sound guide medium, an ultrasonic field detection unit, a rotating mechanism and a processing unit. The bottom of the container is provided with a mounting position. Each group of ultrasonic field detection units comprises a light emitting unit and a camera unit oppositely arranged on both sides of the container along an optical axis. The optical axis is orthogonal to the axis of the ultrasonic field generated by the ultrasonic generation unit. At least one group of ultrasonic field detection units is rotatable to a plurality of different stations around the axis of the ultrasonic field under the action of the rotating mechanism. The light emitting unit is used for emitting detection light at the plurality of different stations. The camera unit is used for correspondingly collecting image information of the detection light deflected through the ultrasonic field at the different stations. The processing unit generates a three-dimensional image of the ultrasonic field based on the collected image information at the plurality of different stations. Thus, the ultrasonic field emitted by the ultrasonic emitter can be detected non-destructively.

The utility model discloses an ultrasonic treatment head, relates to ultrasonic treatment technical field, this ultrasonic treatment head includes liquid storage chamber structure, transducer subassembly, drive subassembly and seal subassembly, liquid storage chamber structure is filled with sound conducting medium, transducer subassembly is provided in liquid storage chamber structure, drive subassembly is provided with drive subassembly, seal subassembly is provided with drive subassembly, the seal subassembly is provided with drive subassembly. The driving assembly penetrates through the liquid storage bin structure to be in transmission connection with the transducer assembly, the sealing assembly comprises a sealing piece and an elastic piece, the sealing piece is arranged on the driving assembly in a sleeving mode and located at the connecting position of the driving assembly and the liquid storage bin structure, the elastic piece abuts against the sealing piece, and the elastic piece is located at the connecting position of the driving assembly and the liquid storage bin structure. And the extrusion part is used for providing extrusion force for the sealing part. According to the ultrasonic treatment head, the elastic piece is arranged to provide continuous extrusion for the sealing piece, so that the sealing piece is tightly attached to the peripheral side wall in contact with the sealing piece, the problem of loosening of the sealing piece is effectively solved, and the sealing performance is guaranteed.

Provided is a combined de-aliasing method of one-way wave equation modeling in a frequency-wavenumber domain. 1, nonphysical signal distortion or artificial noise resulting from a folding effect of Fourier transform and undersampling of Fourier transform and improper mathematical operations of numerical truncation or singular value generation from numerical calculation is eliminated in both of a frequency-wavenumber domain and a spatio-temporal domain; and a specific technical solution includes the following steps: step 1, eliminating singular-value aliasing; step 2, eliminating an artificial boundary noise; step 3, eliminating a Fourier folding effect; and step 4, outputting a correct one-way wave equation after eliminating the aliasing. The combined de-aliasing method of one-way wave equation modeling in a frequency-wavenumber domain involves a reasonable denoising technique, is especially aimed at a one-way wave equation modeling equation in an acoustic medium, and can be extended to elastic mediums and viscoelastic mediums.

Techniques described herein generally relate to generating an audio signal with a speaker. In some examples, a speaker device includes an acoustic medium; a time-varying acoustic coupler; and at least one ultrasound source configured to generate an audio modulated acoustic radiation signal. The ultrasound source is acoustically connected to the acoustic medium through the time-varying acoustic coupler and the time-varying acoustic coupler is configured to generate an audio signal from the audio modulated acoustic radiation signal.

The utility model discloses a mobile phone and a back cover thereof, the back cover can be applied to the mobile phone, the mobile phone is provided with an open-type loudspeaker and a loudspeaker housing used for installing the open-type loudspeaker, the back cover comprises a back cover body, the whole back cover body is in a plate shape with a predetermined thickness, and the back cover body is provided with a plurality of through holes. The back cover body is provided with a first surface facing the loudspeaker shell and a second surface opposite to the first surface; the enclosure structure is of a circumferentially closed structure, and the enclosure structure is arranged on the first surface and is matched with the outer contour of the loudspeaker shell; and the enclosure structure is matched with the back cover body and the loudspeaker shell to form a cavity for mounting an acoustic medium. According to the loudspeaker, the acoustic reinforcing material can be conveniently and effectively arranged in the cavity formed between the loudspeaker shell and the back cover while the resonance problem of the back cover is solved.

The invention discloses a viscous sound wave equation forward modeling method based on iterative convolution, and relates to the field of geophysical exploration, and the method comprises the steps: S1, building a viscous sound wave equation containing time domain convolution based on a generalized standard linear body; s2, establishing an iterative convolution formula based on Taylor series expansion, and obtaining a time domain convolution coefficient; and S3, realizing high-efficiency and high-precision viscous sound seismic wave forward modeling by adopting a finite difference method, and providing a novel numerical simulation method for directly calculating memory variables, namely a first-order-based iterative convolution method, compared with a traditional zero-order-based iterative convolution or differential equation-based viscous sound wave equation forward modeling method and the like. The first-order iterative convolution method has superiority, can effectively reduce the memory occupied by calculation and improve the calculation precision and efficiency in the seismic wave forward modeling simulation of the viscoacoustic medium, and lays an algorithm foundation for the high-precision seismic wave imaging and full-waveform inversion of the viscoacoustic medium.

The invention discloses a broadband sound body wave delay line device film layer structure and a preparation method thereof. The film layer structure comprises a sound transmission medium, an input thin film transducer and an output thin film transducer, wherein the input thin film transducer and the output thin film transducer are arranged at the two ends of the sound transmission medium respectively; each of the two thin film transducers comprises a bottom electrode, an AlScN piezoelectric thin film and an upper electrode which are sequentially arranged away from the sound transmission medium; the orientation of the AlScN piezoelectric film is C-axis orientation, and the full width at half maximum is 1-4; and the doping concentration of Sc in the AlScN piezoelectric film is 5 at%-25 at%. According to the film layer structure, the AlScN thin film is adopted as a piezoelectric material of the transducer, due to the high electromechanical coupling coefficient of the AlScN thin film, the bandwidth of the device can be effectively improved through the structure, and the application scene with the higher bandwidth requirement is met. In addition, by further controlling the orientation, the full width at half maximum and the Sc doping concentration of the AlScN thin film, the relative bandwidth can reach 98% or above, and wider signal processing capacity and anti-interference capacity are achieved.

In some cases, photoacoustic imaging techniques involve detecting photoacoustic signals through an ergodic relay, emitting time-reversed photoacoustic signals back through the ergodic relay to an acoustic medium where acoustic radiation pressure causes surface displacements, optically imaging the surface profile of the acoustic medium at different heights, and constructing a 3D image of the object based on the surface profile at different heights.

In one example, an integrated circuit (IC) comprises: a lead frame including first terminals and second terminals; a first transducer and a second transducer, the first transducer coupled to the first terminals, and the second transducer coupled to the second transducer; an acoustic medium coupled to the first and second transducers; and a mold compound encapsulating at least parts of the lead frame, the first and second transducers, and the acoustic medium.

The present application relates to pericardiocentesis practice technical field, especially in an ultrasonic positioning guide pericardiocentesis practice model, including the ultrasonic wave can be penetrated bionic thoracic base;The heart simulation body is fixed in bionic thoracic base, and the heart simulation body is composed of simulated myocardial layer and the heart chamber placed in its inside and can be filled with liquid;The pericardial sac simulation body is wrapped outside the heart simulation body, and the pericardiocentesis simulation body includes an elastic wall layer film.The present application sets up effusion regulating device communicated with pericardial simulation cavity, and the filling amount of the sound transmission medium in pericardial simulation cavity can be infinitely adjusted by the push and pull of liquid storage injector, after the puncture needle completely breaks through pericardial sac simulation body, continue to needle to contact myocardial simulation film, and the second puncture is empty when the membrane is punctured, and the second puncture is empty when the membrane is punctured, and the second puncture is empty when the membrane is punctured, and the second puncture is empty when the membrane is punctured, and the second puncture is empty when the membrane is punctured, and the second puncture is empty when the membrane is punctured, and the second puncture is empty when the membrane is punctured, and the second puncture

The invention discloses a viscous sound medium preprocessing iteration method one-way wave migration method based on thin plate approximation. The method comprises the following steps: firstly, obtaining an actual seismic record; calculating a forward scattering migration wave field by using a viscous-acoustic medium preprocessing iteration method based on thin plate approximation, and calculating a back scattering migration wave field of the seismic record by taking observation data as a boundary value condition; and finally, scattering wave imaging is carried out by using a cross-correlation imaging condition, and a final migration imaging field is obtained. In the whole process, in order to avoid the influence of the instability of a strong disturbance medium background Green function on an imaging result, a small imaginary part attenuation component is introduced to improve the divergence problem of the Born series in a strong disturbance medium, and the calculation efficiency is further accelerated by utilizing a pre-solution factor. In order to avoid the problem of solving a large iterative matrix, a speed model is divided into thin plates by utilizing the thought of thin plate division, so that global calculation is converted into local calculation, and migration imaging with relatively high efficiency and relatively high precision is finally realized through the process.

The utility model provides an ultrasonic field detection device and an ultrasonic emission detection system.The detection device comprises a container used for containing a sound conducting medium, an ultrasonic field detection unit, a rotating mechanism and a processing unit, and a mounting position is arranged at the bottom of the container; each ultrasonic field detection unit comprises a light emitting unit and a camera shooting unit which are oppositely arranged on the two sides of the container along the optical axis, the optical axis is orthogonal to the axis of the ultrasonic field generated by the ultrasonic generation unit, and at least one ultrasonic field detection unit can rotate to a plurality of different stations around the axis of the ultrasonic field under the action of the rotating mechanism; the light emitting unit is used for emitting detection light at multiple different stations, the camera shooting unit is used for correspondingly collecting image information of the detection light deflected by the ultrasonic field at the different stations, and the processing unit generates a three-dimensional image of the ultrasonic field based on the image information collected at the multiple different stations. Therefore, the ultrasonic field emitted by the ultrasonic transmitter can be nondestructively detected.

Systems, methods, and mechanisms for a transducer probe for ultrasonic measurement and direct neuromodulation, e.g., a transducer probe generating ultrasound across a broad range of frequencies to acoustically modulate groups of neurons. A probe may be configured to generate focused ultrasound inside an acoustic medium. The probe may include a plurality of ultrasonic transducer elements along its length. The probe may be configured to generate ultrasound across a broad range of frequencies. The probe may be configured to focus ultrasound down to an approximately 100 micrometers (μm) diameter spot size, e.g., to a focal point or spot of approximately 100 μm. In addition, the focal spot may be movable in space via phased array focusing.

The utility model belongs to the technical field of medical instruments, and discloses a treatment head and a treatment handpiece, the treatment head is used for being matched with a handle for use, the treatment head comprises a shell and a transducer module, the shell is provided with a containing cavity and a connecting port, the containing cavity is used for containing a sound conducting medium, and the transducer module is arranged in the containing cavity; the containing cavity is communicated with the connecting port, and the connecting port can be opened so that the handle can stretch into the containing cavity for heat dissipation. According to the invention, effective heat dissipation of the treatment head can be realized, and the heat dissipation efficiency of the treatment head is improved, so that the use safety of the treatment head is improved.

The invention discloses a viscoacoustic medium scattered wave numerical simulation method based on a preprocessing iteration method, and the method comprises the steps: introducing a small imaginary component into a background wave number, and obtaining an L-S equation with a complex wave number; then, pre-processing an L-S equation with a complex wave number by using a pre-solution factor defined by means of the small imaginary component; and finally, carrying out iterative solution on the preprocessed L-S equation by utilizing an iterative method to obtain a Born series improved by a complex wave number and preprocessing. In the whole process, a small imaginary component is introduced to improve the divergence problem of the Born series in a strong disturbance medium, and a pre-solution factor is utilized to further accelerate the calculation efficiency; and in order to avoid the problem of solving a large iterative matrix, a speed model is divided into thin plates by using the thought of thin plate division, so that global calculation is converted into local calculation, and through the process, the seismic scattered wave record is finally extracted with relatively high efficiency and relatively high precision.

The application discloses a kind of for low frequency broadband high-efficiency sound absorption metamaterial unit and its superstructure module, and the metamaterial unit includes the metamaterial cavity enclosed by multiple blocks of wall and the acoustic waveguide channel being arranged in the metamaterial cavity, acoustic waveguide channel is provided with impedance high-efficiency modulation sound absorption body, impedance high-efficiency modulation sound absorption body includes high porosity sound absorption medium and impedance modulation channel.The introduction of impedance modulation channel can effectively change the acoustic characteristics of high porosity sound absorption medium, by changing the geometric configuration of impedance modulation channel, can be widely modulated acoustic impedance, while producing resonance absorption peak in low frequency band, so as to significantly improve the sound absorption performance in low frequency band.A plurality of metamaterial units with different low-frequency high-efficiency absorption performance are connected in parallel, and through the coupling effect between the metamaterial units, a metamaterial module with low-frequency broadband high-efficiency sound absorption and noise reduction performance can be formed, thereby realizing low-frequency broadband high-efficiency sound absorption performance.

The invention relates to the technical field of geological exploration in the petroleum industry, in particular to a viscous-acoustic medium angle gather extraction method based on self-adaptive wave beam reverse time migration. According to the method, the self-adaptive beam operator depending on local space velocity change is introduced to realize automatic focusing of the seismic beam, and the absorption attenuation effect caused by the viscosity is compensated through the viscous sound medium during complex value travel; slowness information of a shot point is extracted based on travel time information of a self-aggregation seismic beam, a reflection field angle at an imaging point position is further calculated, an imaging value is located at a correct position according to the range and interval of the reflection field angle, and direct extraction of a viscous sound medium angle gather is achieved. According to the method, the absorption attenuation effect caused by the viscosity of the medium can be effectively compensated, the high-quality angle gather can be output, the calculation efficiency and the calculation precision are both achieved, and powerful support is provided for migration velocity analysis and oil reservoir description work of the viscous medium.

This disclosure relates to an acoustic transducer array assembly including a printed circuit board having at least one plated through-hole and a matching layer containing an acoustic medium configured to provide acoustic impedance matching between at least one piezoelectric element and the acoustic impedance of a target sample, configured to provide acoustic pressure waves to at least one sample location. The acoustic transducer array assembly further comprises at least one acoustic transducer having at least one signal electrode electrically connected to at least one plated through-hole and acoustically coupled to the matching layer, at least one ground electrode electrically connected to at least one plated through-hole and acoustically coupled to the matching layer, and at least one piezoelectric element electrically connected to the at least one signal electrode and the at least one ground electrode.

The utility model discloses an ultrasonic treatment head and a treatment instrument, and relates to the technical field of ultrasonic treatment, the ultrasonic treatment head comprises a bottom shell, a cover body and a transducer, the bottom shell is provided with a sound transmission port; the cover body is connected with the bottom shell, a liquid containing cavity is defined by the cover body and the bottom shell, and the liquid containing cavity is filled with a sound conducting medium; the energy converter is mounted in the liquid containing cavity and is suitable for transmitting ultrasonic energy outwards through the sound transmission opening; wherein the cover body comprises a top wall provided with a liquid injection channel, the top wall comprises a first inner wall surface and at least one second inner wall surface, the distance from the first inner wall surface to the sound transmission opening is larger than the distance from the second inner wall surface to the sound transmission opening, and the liquid injection channel is located on the first inner wall surface. According to the technical scheme provided by the utility model, bubbles are not easy to remain in the liquid containing cavity filled with the sound conducting medium in the ultrasonic therapeutic apparatus when water is injected, and the normal conduction of ultrasonic waves is prevented from being influenced by the bubbles.

The application discloses a viscoacoustic medium characteristic wave and primary wave combined least square reverse time migration method and belongs to the technical field of oil geophysical exploration. The method constructs a new combined Q least square reverse time migration target function, introduces a viscoacoustic differential equation and an accompanied pseudo-differential equation, describes forward and reverse propagation wave fields of the combined Q least square reverse time migration, deduces Q compensation wave field propagation, Q compensation accompanied operators and Q attenuation migration operators of primary waves, multiple waves, diffracted waves and prism waves, constructs a new gradient formula, and realizes Q least square reverse time migration of combined multiple waves, diffracted waves, prism waves and primary waves in a viscoacoustic medium. The method can accurately image structures under salt, steeply inclined flanks, small faults and rock caves, obtain clearer complex structure information, obtain high-resolution and high-quality imaging diagrams, and solves the problem of unclear imaging of current special complex high-steep structures.

The application discloses a self-evolution underwater communication method and system for an underwater acoustic dynamic heterogeneous channel. A hyperbolic frequency modulation acoustic signal is used by a sending end underwater acoustic node to extract time domain multipath and frequency domain Doppler characteristics of an underwater acoustic medium, and a joint entropy value is constructed to initialize acoustic wave transmission waveform parameters. An error code rate is monitored by a receiving end, and an energy efficiency fitness function value is calculated by combining an underwater acoustic transducer and a physical layer total energy consumption to perform feedback. According to the function value change trend, a directional update rule is used by the sending end to perform joint iteration on a subcarrier spacing, a cyclic prefix and a pilot insertion density. When the channel is reliable but the energy efficiency decreases, a low energy consumption disturbance operation of reducing the pilot insertion density or shortening the cyclic prefix is forced to be performed to reduce the invalid acoustic wave radiation time of the transducer. Through entropy value decoupling and energy efficiency evaluation, the application solves the acoustic energy waste problem caused by excessive protection of a traditional communication method, and significantly prolongs the endurance of an underwater node.

The invention discloses a self-evolution underwater communication method and system for an underwater sound dynamic heterogeneous channel, and the method comprises the steps: extracting time domain multipath and frequency domain Doppler features of an underwater sound medium through a transmitting end underwater sound node through a hyperbolic frequency modulation acoustic signal, and constructing a joint entropy value to initialize a sound wave transmission waveform parameter; the receiving end monitors the bit error rate and calculates an energy efficiency fitness function value for feedback by combining the total energy consumption of the underwater acoustic transducer and the physical layer; the sending end performs joint iteration on the subcarrier interval, the cyclic prefix and the pilot frequency insertion density by utilizing a directional updating rule according to the change trend of the function value; when the channel is reliable but the energy efficiency is reduced, a low energy consumption perturbation operation of reducing the pilot insertion density or shortening the cyclic prefix is enforced to reduce the invalid sound wave radiation time of the transducer. According to the method, through entropy decoupling and energy efficiency evaluation, the problem of acoustic energy waste caused by excessive protection in traditional communication is solved, and the endurance of the underwater node is remarkably prolonged.

A method for acoustic environment reproduction in a motor vehicle is described, wherein at least one object is detected in an environment around the motor vehicle using at least one sensor, and a relative position of the object to the motor vehicle is determined, wherein an audio signal is generated depending on the relative position of the object to the motor vehicle, wherein the audio signal is a reproduction of an acoustic medium, wherein an object representation of the object in a position assigned to the relative position in a motor vehicle interior is simulated, and wherein an influence of the object representation at the assigned position on the spatial sound in the motor vehicle interior is simulated by modifying the audio signal.

The application discloses a mixed type ultrawideband sound absorption superstructure and a sound absorption module thereof, and relates to the field of acoustic noise reduction.The sound absorption superstructure comprises a resonance unit and a high-porosity sound absorption medium.The resonance unit comprises an outer shell, a rectangular channel and a cover plate.The cover plate is arranged in the outer shell, and divides the cavity in the outer shell into an upper space and a lower space.The rectangular channel is surrounded by two wall plates, the two wall plates are arranged in the lower space, and the top ends of the two wall plates are connected with the cover plate.The high-porosity sound absorption medium is filled in the upper space, the high-porosity sound absorption medium is provided with a sound wave guide channel, and the sound wave guide channel is coaxial with the rectangular channel.A through hole is arranged on the cover plate, so that the rectangular channel is connected with the high-porosity sound absorption medium.The application is applied to the field of acoustic noise reduction, and can overcome the defects of complex configuration, a large number of combined units, long development time, complex processing and installation, high cost and poor reliability of a traditional super material structure scheme for realizing low-frequency and ultrawideband high-efficiency sound absorption.

The invention provides a method and a system for processing high-resolution seismic data in a viscoacoustic medium. The data processing method comprises the following steps: establishing a demigration operator corresponding to a wave equation of the viscoacoustic medium; determining a target function according to the demigration operator; and obtaining observation data, and performing iterative inversion according to the objective function to generate an imaging result. The method comprises the following steps: starting from a viscoacoustic medium theory, establishing an anti-migration operator corresponding to reverse time migration and an objective function of least square migration according to medium parameters needing to be imaged on the basis of a least square inversion theory, and deducing an iterative inversion algorithm by virtue of an adjoint state method, so as to realize the least square reverse time migration of the viscoacoustic medium. When inversion imaging is carried out on seismic data of a viscoacoustic medium, the imaging precision of a geologic body under a complex medium condition can be effectively improved, and imaging with amplitude preservation, fidelity and relatively high resolution is realized.