59 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.

The invention relates to a seismic scattered wave field forward modeling method and device, a medium, electronic equipment and a product, and the method comprises the steps: dividing a speed model into a plurality of thin layers from the top of the model to the bottom of the model in a depth direction, acquiring downlink scattered wave data and primary uplink scattered wave data corresponding to each thin layer in a first propagation direction from the top of the model to the bottom of the model along a second propagation direction by using a high-order generalized screen continuation operator based on the Muller model, primary uplink scattered wave data reserved in the first direction is used as an initial value, primary uplink scattered wave data corresponding to each thin layer in the second propagation direction is obtained through the high-order generalized screen continuation operator, and the second propagation direction is the direction from the bottom of the model to the top of the model; and determining a forward modeling seismic record of the detector position according to the uplink scattered wave data corresponding to each thin layer in the second propagation direction. According to the method, the accuracy of forward modeling of the seismic scattered wave field in the viscoacoustic medium can be improved.

The invention discloses a vibration noise digital twinborn modeling method and system for a large complex, relates to the technical field of computer data processing, and aims at a target complex to perform sensing array deployment and twinborn reconstruction, construct a three-dimensional twinborn body and determine a vibration noise source of the target complex. Discrete aggregation is carried out in a vibration mode, a vibration equation of each aggregation class is mined, an explicit scene migration framework is introduced, modeling explicit requirements of a vibration noise scene are determined, the vibration equations are assisted, vibration noise distribution based on acoustic medium boundaries is carried out on the three-dimensional twin body, and a vibration noise model is generated; the method and the device are used for solving the technical problem of insufficient accuracy and adaptability of dynamic modeling caused by insufficient refinement degree and flexibility of vibration noise modeling for complex building scenes in the prior art. The vibration noise fine modeling and dynamic visual presentation oriented to complex building scenes are realized, and the method has the remarkable advantages of high accuracy and high adaptability.

The invention discloses an ultrasonic treatment instrument which comprises a power source, a power driving module, an ultrasonic transducer, a control module, a temperature adjusting system and a display module. The ultrasonic transducer generates focused ultrasonic waves, the temperature adjusting system can adjust the temperature of the sound transmission medium in time according to a temperature signal of the temperature sensor, it is ensured that the temperature of the treatment contact part of the ultrasonic transducer is stable, the skin of a patient is not hurt, and safe and reliable treatment is ensured.

The invention discloses an ultra-wide-band noise reduction and bearing function integrated metamaterial structure sound barrier. The ultra-wide-band noise reduction and bearing function integrated metamaterial structure sound barrier comprises a multifunctional integrated screen body and a porous metamaterial sound absorber. The multifunctional integrated screen body comprises a composite non-uniform hollowed-out plate and a cavity, the composite non-uniform hollowed-out plate is arranged at the open end of the cavity, and partition plates are arranged in the cavity to divide the cavity into a plurality of sub-cavities; the porous super-structure sound absorber comprises a plurality of high-porosity sound absorption media arranged in the corresponding sub-cavities, and sound wave regulation and control channels are formed in the high-porosity sound absorption media. The metamaterial structure sound barrier is applied to the field of acoustic noise reduction, the metamaterial structure sound barrier can obtain low-frequency and ultra-wide-band efficient sound absorption performance, the overall rigidity of the sound barrier is improved, the longitudinal supporting area of the sound barrier is increased, the ultra-wide-band sound insulation performance of the sound barrier is greatly improved, meanwhile, the bearing capacity of a sound barrier body is greatly improved, and the noise reduction effect is good. The integration of the ultra-wideband efficient noise reduction performance and the high bearing function of the sound barrier with the metamaterial structure is realized.

The invention relates to a high-order staggered grid viscous sound medium reverse time migration tunnel advanced detection method and system, and belongs to the field of tunnel engineering geophysical prospecting. According to the method, a viscoelastic anisotropic TTI medium anisotropy wave equation expressed by a fractional Laplace operator is deduced, and a viscoelastic anisotropic TTI medium first-order speed-stress elastic wave equation is solved by adopting a high-order staggered grid finite difference method. According to the invention, the wave field information at any moment is obtained, so that the propagation process of seismic waves in an underground medium is simulated more accurately. In order to solve the problem of reflection possibly caused by artificial boundaries, a PML (perfectly matched layer) absorption boundary processing method of a new attenuation function is adopted. According to the method, seismic waves can be effectively absorbed, reflection is avoided, and therefore simulation stability and accuracy are guaranteed. Generally speaking, the invention provides an accurate and stable tunnel advanced detection forward modeling method, and a reverse time migration algorithm is carried out in an attenuation TTI medium.

The invention belongs to the field of sound insulation materials and structural acoustic performance design, and provides a portable modularized sound insulation device with adjustable sound insulation index, which can realize the adjustability of quality and sound insulation performance, and can realize rapid transportation and installation through a modularized light sound insulation device according to different application scenes under the condition of limited thickness. Different kinds of media such as liquid and gas are utilized to ingeniously achieve on-site adjustment of the quality of the sound insulation unit, and the requirements for the surface density of heavy and light sound insulation devices in different application scenes are met; and the temperature control unit is used for controlling the temperature of the sound insulation medium, so that the sound insulation device has the temperature adjusting capability.

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.

The utility model relates to the field of range hoods, and provides a range hood, which comprises a fan, a shell and a first rectifying component, and the fan is provided with a main air suction port; an air flow channel is formed between the machine shell and the fan in a surrounding mode and communicates with the main air suction port; the first rectifying component is arranged in the airflow channel and corresponds to the main air suction port. According to the range hood, the first rectifying component is arranged at the corresponding position of the main air suction port of the fan to adjust the flow velocity distribution of the airflow in the airflow channel and flowing to the main air suction port, so that the non-uniformity of the flow state in the range hood is reduced, the flow velocity uniformity of the airflow in the airflow channel and flowing to the main air suction port is improved, and the turbulence level of a flow field is reduced; and on the other hand, the first rectifying component can serve as a sound insulation medium to a certain degree, and noise propagation is weakened on the propagation path.

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.

The invention discloses an underwater millihertz earthquake sound source transducer and a low-frequency sound wave generation method, the transducer comprises a shell assembly, a high-frequency acoustic transducer, an acoustic medium, a magnetic field generation assembly, an electric field generation assembly and acoustic rubber, and the shell assembly is internally provided with a cavity; the high-frequency acoustic transducer is arranged at the first end of the cavity, the acoustic rubber is arranged at the second end of the cavity, and the acoustic medium is arranged between the high-frequency acoustic transducer and the acoustic rubber; the magnetic field generation assembly is arranged on the shell assembly and used for generating a magnetic field covering the acoustic medium; the electric field generating assembly is arranged on the shell assembly and used for generating an alternating current electric field covering the acoustic medium; the acoustic medium is oscillation fluid. Fluid is driven through an electric field and a magnetic field, sound waves are in nonlinear coupling with the fluid, millihertz sound waves are generated while the small size is kept, modulation sound waves can be generated, and the application requirements of prospecting, ultra-long-distance detection and the like are effectively met.

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.