156 results about "Acoustic property" patented technology

The invention relates to the technical field of material analysis, and discloses an intelligent raw material composition screening method and system based on a sound insulation material, and the method comprises the steps: collecting acoustic characteristic test data, microstructure data and chemical composition data of a candidate sound insulation material; performing frequency response curve decomposition on the acoustic characteristic test data to obtain a characteristic frequency band sound absorption coefficient, and constructing an acoustic impedance tensor of the sound insulation material to analyze the sound wave dissipation performance of the candidate sound insulation material; calculating the pore distribution entropy and connectivity index of the candidate sound insulation material to analyze the sound wave propagation retardation efficiency of the candidate sound insulation material; analyzing the molecular chain flexibility and interfacial compatibility of the candidate sound insulation material to evaluate the acoustic performance stability of the candidate sound insulation material for multi-component compounding; and screening a target material from the candidate sound insulation materials by using sound wave dissipation performance, sound wave propagation retardation efficiency and acoustic performance stability. The performance matching degree of the raw materials screened out of the sound insulation material in actual composite use can be improved.

The invention provides a cell acoustic characteristic parameter estimation method and system based on a full-connection neural network and a computer medium, and relates to the technical field of biomedical engineering and micro-nano operation, and the method comprises the steps: constructing a three-layer spherical shell model of a target cell, defining the radius, density and sound velocity of each layer and a surrounding medium, and constructing a three-layer spherical shell model of the target cell; the acoustic impedance and the wave number of each layer are calculated; obtaining a transducer driving parameter, a displacement speed of the cell or equivalent particle solid sphere particle, and physical parameters of the cell and a medium; inputting the input feature data into a pre-trained full-connection neural network model to output acoustic characteristic parameters such as a scattering coefficient and an internal refraction coefficient; and calculating acoustic radiation force based on the acoustic characteristic parameters to realize dynamic control. Based on the full-connection neural network and the three-layer spherical shell model, the cell acoustic parameters are efficiently and accurately estimated, the problems that a traditional method is complex in calculation and insufficient in precision are solved, and accurate operation of the acoustic tweezers on the cells is achieved.

The invention provides an ultrasonic detection method for internal defects of an insulating part of a power system based on a piezoelectric ultrasonic transducer, and belongs to the technical field of insulating part detection. After wavelet denoising and deep attenuation compensation are carried out on echo signals, sound path distance time delay and sound pressure amplitude parameters are extracted, defect identification and position estimation are carried out by utilizing a layered variational auto-encoder, a high-frequency transducer is switched to aiming at tiny defects, a harmonic component is extracted by adopting a nonlinear ultrasonic method, and a characteristic size is calculated; a defect distribution space feature matrix is generated based on a synthetic aperture focusing technology, a unified or personalized processing strategy is selected according to an acoustic characteristic homogenization degree evaluation value, a complete defect detection result is output, and the technical problem that deep weak defects in the electric insulation part are difficult to accurately detect and recognize is solved.

The present disclosure relates to the technical field of audio control. Provided are a computer-implemented method for audio control, and an electronic device and a storage medium. The computer-implemented method for audio control comprises: on the basis of a specified measurement signal, performing acoustic effect testing on a target space, in order to obtain environmental response information, wherein the environmental response information comprises impulse response information and post-separation impulse response information; analyzing the environmental response information, in order to obtain acoustic characteristic information of the target space; on the basis of the acoustic characteristic information, performing compensation processing on audio to be processed, in order to obtain regulated audio; regulating gains of multiple channels corresponding to the regulated audio, in order to obtain re-regulated audio; and performing multi-channel collaborative optimization processing on the re-regulated audio, in order to obtain audio having a target effect. The method achieves precise compensation for spatial acoustic defects, resolves inter-channel crosstalk, improves the acoustic image localization and spatial perception, significantly improves the perceptual audio quality, and optimizes an output.

The invention belongs to the technical field of digital design of Roots blower equipment, and particularly relates to a digital twinning-based dynamic performance digital design method of a blower, which comprises the following steps of: constructing a multi-component parameterized structure model of the blower, establishing a multi-physics field coupling model of pneumatic, structural, thermal, electromagnetic and sound fields, and constructing a digital twinning model of the blower. Dynamic boundary conditions such as flow disturbance, inertia force and base disturbance are loaded, a digital twin model synchronous with a physical fan state is constructed, master-slave type strong coupling joint solution is executed, multi-field response indexes are extracted and normalized analysis is carried out, and finally optimization design parameters of the fan are output through a multi-target optimization feedback mechanism. According to the method, multi-domain balance design among fan structure performance, electromagnetic response, thermal stability and acoustic characteristics can be achieved, modeling precision and parameter optimization capacity are improved, and the method is suitable for digital development of high-reliability roots blower equipment under complex operation conditions.

The invention discloses a sound wave detection method and system for an underground pipeline, and the method comprises the following steps: 1, dynamically adjusting the detection height in the radial direction of a pipeline through a lifting adjustment device of a first sound wave detection mechanism, and enabling a sound wave transmitting end to adapt to the inner walls of pipelines with different pipe diameters; 2, a rotation driving device of a second sound wave detection mechanism controls a sound wave transmitting end to conduct multi-angle rotation scanning around the axis of the pipeline, and the circumferential area of the cross section of the pipeline is covered; 3, based on the pipeline inner diameter D, the material acoustic characteristics and the preset coverage rate eta, motion parameters are generated through a dynamic optimization algorithm; 4, collecting a reflected sound wave signal and carrying out multi-stage processing; through the implementation of the method, a dynamic optimization algorithm of full-dimensional scanning coverage enables the screw pitch error of a spiral track to be small, 100% non-blind area coverage of the cross section of the pipeline is achieved, the self-adaptive focusing lens controls the sound beam focusing angle error to be within + / -2 degrees, and the detection sensitivity of the thin-walled pipe is improved.

An acoustic wave device is disclosed. The acoustic waved device can be a shear horizontal mode surface acoustic wave device. The acoustic wave device can include a piezoelectric layer, an interdigital transducer electrode over the piezoelectric layer, and a temperature compensation layer over the interdigital transducer electrode. The piezoelectric layer can be a lithium niobate layer with a cut angle in a range of −20° YX to 25° YX. The interdigital transducer electrode including a first layer and a second layer. The first layer affects acoustic properties of the acoustic wave device and the second layer affects electrical properties of the acoustic wave device. The second layer is positioned between the piezoelectric layer and the first layer such that a frequency response of the acoustic wave device includes a Rayleigh mode response at a frequency higher than a shear horizontal mode response.

A method can include determining carbon dioxide acoustic properties for at least supercritical carbon dioxide using thermodynamics that relate isothermal compressibility and adiabatic compressibility: determining fluid-saturated rock acoustic properties using the carbon dioxide acoustic properties; and performing a seismic workflow using the fluid-saturated rock acoustic properties.

Techniques for providing neuroacoustic modeling for an audio environment are disclosed herein. Examples may include receiving audio data and image data associated with an audio environment; generating an image set comprising a plurality of images, each image associated with an audio sample representing an acoustic property of the audio environment; and generating an audio rendering model for the audio environment based at least in part on the image set and the audio samples. The audio rendering model may include a neural rendered volumetric representation of the audio environment enhanced with audio coding.

This application is entitled "Apparatus and Method for Acoustic Modeling of Defects in Composite Materials with Calibration Panels Formed by Additive Manufacturing." Disclosed herein is a calibration panel that models acoustic properties of defects in a vehicle component made of a composite material. The calibration panel includes a body formed by a first digital material through additive manufacturing, the acoustic properties of which are selected to approximate acoustic properties of the composite material, and an insert embedded within the body, the insert formed at least of a second digital material, the acoustic properties of which are selected to approximate acoustic properties of a defect within the composite material. Also disclosed herein is a method for manufacturing a vehicle component that complies with non-destructive evaluation (NDE). The method includes receiving a proposed design of a component, manufacturing a calibration panel, and testing the calibration panel to determine whether the insert is detectable using acoustic emission testing. The method further includes rejecting the proposed design of the component in response to a non-detectable state of the insert.

A computer having a system for mitigating mechanical rattle arising due to a mechanical coupling of an audio output transducer to a part of the computer device, the system comprising: a processing subsystem configured to receive an input audio signal and to output a drive signal for driving the audio output transducer to produce a transducer output, wherein the processing subsystem is configured to selectively apply an attenuation function to the input audio signal to attenuate a signal component of the input audio signal at a frequency that causes mechanical rattle in the computer; and an analyser subsystem configured to receive the input audio signal and to output a control signal to the processing subsystem to control application of the attenuation function to the input audio signal by the processing subsystem based on a spectral content of the received input audio signal; wherein the attenuation function is based on characteristic acoustic behaviour of the computer.

This disclosure provides a wedge and design method for a multipath acoustic attenuation phased array ultrasonic testing probe. The wedge includes a wedge body, multiple silencing grooves, and a damping block. The extension direction, spacing, and depth of each silencing groove are configured such that at least a portion of the reflected transverse wave generated at the detection surface can be guided to an attenuation interface formed by the groove wall of the silencing groove and the damping block. Furthermore, the reflected longitudinal wave generated at the detection surface undergoes at least six interface reflections within the wedge body before returning to the probe direction. The acoustic characteristics of the damping block are configured to absorb the reflected transverse wave. The reflected transverse wave is attenuated at the attenuation interface through a combination of scattering by the silencing groove and absorption by the damping block. After at least six interface reflections, the acoustic component of the reflected longitudinal wave returning to the probe direction forms a 180° phase difference with the incident longitudinal wave emitted by the probe, thus being attenuated through phase interference.

In order to adapt the frequency response of headphones, various filters are used, including shelving or frequency-shelving filters. However, these are usually implemented electronically. In the case of wired headphones without their own voltage supply, however, no electronic signal processing is possible. In order to realise an acoustic shelving filter, an acoustic damping element (DD) having a flat, acoustically effective damping material, which has a defined specific acoustic resistance, is placed in front of the radiating surface of the sound transducer at a small distance (d) in relation to the diameter of the acoustic damping element. It thus forms a flat air gap (AG), which is open at the edge, with respect to the radiating surface of the transducer. Acoustic properties of the shelving filter can be controlled by the size and material of the damping element (DD) and its distance from the sound panel (SW) or from the transducer (W).

Disclosed herein is a method for determining a characteristic of a hearing instrument, the hearing instrument including at least one input transducer operable to provide an input audio signal responsive to sensing sound in the environment of the hearing instrument, a signal processing unit and at least one output transducer, the method comprising: emitting an acoustic probe signal by the output transducer, receiving an input audio signal from the microphone, analyzing the received input audio signal to determine the characteristic of the hearing instrument from an input transducer response to the emitted acoustic probe signal, wherein the method further comprises filtering the received input audio signal to selectively attenuate one or more signal components corresponding to the acoustic probe signal and wherein emitting the acoustic probe signal comprises emitting a combined acoustic output signal comprising the acoustic probe signal and an acoustic hearing instrument signal obtained from the filtered input audio signal.

The embodiments of the present disclosure provide an electronic apparatus and a method performed by the same, a storage medium, and a computer program product which relates to the field of artificial intelligence. The method includes: acquiring a plurality of first audio signals recorded at a plurality of different locations in a space where a sound source is located; rendering, for each first audio signal, using a transmission response corresponding to at least one other first audio signal to obtain a rendered audio signal; estimating parameters for reflecting acoustic characteristics of the space based on the plurality of rendered audio signals; and performing, based on the estimated parameters, audio rendering of a virtual audio to obtain a reverberation audio. Alternatively, the above method executed by electronic apparatus may be executed by using artificial intelligence models.

The application relates to the technical field of surface acoustic wave devices, in particular to a structure and method for suppressing bulk acoustic wave interference in a multilayer SAW resonator, which comprises a support substrate, a bonding layer, a piezoelectric layer and an interdigital transducer, a reflective grating and an RF signal pad arranged in sequence from bottom to top; wherein an acoustic impedance matching and attenuating layer is arranged between the RF signal pad and the piezoelectric layer, and the acoustic impedance matching and attenuating layer is a single dielectric layer or a periodic multilayer film alternately stacked by two or more dielectric materials with different acoustic characteristics, and the material of the single dielectric layer is silicon dioxide or doped silicon dioxide. The application sets the acoustic impedance matching and attenuating layer between the RF signal pad and the piezoelectric layer, so as to effectively absorb and scatter the bulk acoustic wave energy generated below the pad, convert the bulk acoustic wave energy into heat energy, significantly weaken the bulk acoustic wave intensity, and improve the overall performance and consistency of the SAW device in high-frequency communication applications.

The present invention provides a modular ash storage system designed for integration into the body of an acoustic guitar, allowing for the secure and discreet storage of cremated remains. The system includes a cap assembly configured to fit into the sound hole of the guitar, featuring a flexible lip to ensure a snug and removable fit, and an interior threaded section for connecting to an ash container. An attachment component is affixed to the interior surface of the guitar body and includes a mounting point to which the ash container is securely attached. The ash container is lightweight and suspended within the interior of the guitar to prevent interference with the instrument's acoustic properties. The modular design allows for easy installation and removal without requiring permanent modifications to the guitar, offering a meaningful and discreet method of memorialization while preserving the instrument's aesthetic and functional integrity.

There are disclosed apparatus and methods for encoding and decoding of acoustic environment. In accordance with an example, there is provided an apparatus for decoding an acoustic environment, the acoustic environment including at least one audio source and at least one audio object, the at least one audio object being represented by a structural-acoustic data which links positional data of polygons with acoustic properties of acoustic materials, wherein the positional data includes, for each polygon, the position of the vertexes, the apparatus comprising a bitstream reader for reading, from the bitstream, an encoded version of structural-acoustic data and at least one audio stream to be rendered as generated by the at least one audio source in the acoustic environment. An audio source decoding block to decode the at least one an audio stream representing the at least one audio source. A structural-acoustic data decoding block to decode the structural-acoustic data.

Multiple motion parameters are determined from the simulated object mesh. These motion parameters include information on the virtual character's motion velocity, the object's deformation rate, and the object's deformation region size. Based on the first audio parameter control and the multiple motion parameters, a friction sound is retrieved from a friction audio database containing multiple sample friction sounds. The first audio parameter control is configured to control the characteristics of the friction sound. Based on the second audio parameter control and the multiple motion parameters, a crumpling sound is retrieved from a crumpling audio database containing multiple sample crumpling sounds. The second audio parameter control is configured to control the characteristics of the crumpling sound.

Aspects of the disclosure relate to a ducted propulsor fan having a modular duct. The modular duct may include a front inlet liner that can be easily removed from the ducted propulsor fan. The removable front inlet liner may allow for servicing of a fan seal included in the ducted propulsor fan. The ducted propulsor fan may be configured to be compatible with different front inlet liners that each have different acoustic properties.

The invention provides a far-field speech recognition method and system. The method comprises the following steps: constructing a three-dimensional visual robot indoor scene semantic map; marking the material acoustic attribute of each material on the three-dimensional visual robot indoor scene semantic map to construct a spatial acoustic fingerprint; voice signals are collected in different directions, and sound source information is determined; fusing the spatial acoustic fingerprint and the sound source information to obtain environmental acoustic data; adjusting voice recognition parameters according to the environmental acoustic data state; and analyzing a voice instruction in the voice signal according to the adjusted voice recognition parameter.

The present invention provides an in-vehicle sound field optimization method and apparatus, and an audio control system. The method comprises: when a warning target is detected in a warning area corresponding to a target vehicle, acquiring relative position parameters between the warning target in the warning area and the target vehicle; on the basis of the relative position parameters, reconstructing a sound field in a cabin of the target vehicle to obtain a corresponding target warning sound source file; and on the basis of the target warning sound source file, outputting to each speaker a corresponding audio control signal. The audio control signal is used to enable a warning sound emitted by the corresponding speaker to have corresponding acoustic characteristics, so as to form, inside the target vehicle, a sound field that reflects the position and movement direction of the warning target. By implementing the present invention, vehicle occupants can easily obtain orientation and motion information of a warning target via a 3D warning sound emitted by the audio control system.

The invention belongs to the technical field of material ultrasonic detection, and relates to a composite board interface defect classification and identification method and system based on echo feature fusion, and the method comprises the steps: extracting ultrasonic echo multi-dimensional acoustic features; calculating a local acoustic feature aliasing degree; combining the acoustic impedance value, the local acoustic feature aliasing degree and the sample scarcity degree to generate a dynamic acoustic cost weight; reconstructing a random forest model, and constructing a cost-sensitive voting factor by using an information gain index and a cost weight; inputting the multi-dimensional acoustic features of the to-be-detected composite board, and executing weighted summation to obtain a classification result; according to the method, the feature aliasing degree can be evaluated more accurately, the sample scarcity and acoustic characteristics are comprehensively considered, the importance of high-risk defect features in decision making is ensured, the misjudgment problem is effectively solved, and the accuracy and reliability of composite board interface defect classification and recognition are improved.

The present disclosure relates to pumps and pump systems, for instance, smart pumps. In particular, the disclosure is concerned with pump control and monitoring. A pump system is provided, which can monitor sound, detect acoustic anomalies, and control the pump accordingly. The pump system comprises a pump for pumping a fluid, an acoustic sensor, and a processor. The acoustic sensor is configured to capture sound of the pump environment and of the pump. Further, the acoustic sensor is configured to convert the captured sound into acoustic data. The processor is configured to compare the acoustic data with reference acoustic data for the pump, in order to detect an anomaly in the acoustic data based on the reference acoustic data.

The invention relates to the technical field of sound field control, in particular to a sound equipment sound field low-frequency increasing and decreasing method and system based on volume amplitude recognition, and the method comprises the following steps: collecting an original audio stream, and extracting instantaneous amplitude features; calculating a low-frequency compensation coefficient according to the nonlinear auditory model; constructing a dynamic safety threshold and correcting a coefficient in combination with the physical limit of the equipment; and adjusting the low-frequency component based on the corrected parameter, and generating an optimized sound field signal. According to the invention, by establishing a dynamic mapping and constraint mechanism between the instantaneous volume amplitude and the low-frequency gain, the technical defects that the low-frequency hearing feeling of a traditional sound system is deficient under the low volume and overload distortion is extremely easy to occur under the high volume are thoroughly solved, and under the premise of strictly guaranteeing the physical safe operation of loudspeaker hardware, the sound quality is greatly improved. And full-dynamic-range sound field adaptive equalization and restoration conforming to human ear psychological acoustic characteristics are realized.

A method for mapping acoustic characteristics of an underwater sediment includes penetrating a pile into the underwater sediment at a first location of a plurality of locations. A first distributed acoustic sensor is inserted near the first post. At the second location, the second pile is driven into the deposit. When the second pile is penetrated, an acoustic signal is detected at the first acoustic sensor. While driving a second pile, a depth indexed to the second pile is detected. A second acoustic sensor is inserted near the second post. Penetrating the pile, detecting the acoustic signal at each acoustic sensor, and inserting the sensors are repeated until the pile is driven at all locations. The signals are used to generate a map of characteristics of the deposit defined by a plurality of locations. Characteristics include attenuation that excludes the effects of diffractors in deposits.

The present application relates to a liquid transport system capable of transporting a liquid sample from a first container to a second container using ultrasonic sound signals and measuring properties of both the liquid and the first container using ultrasonic sound signals. The system uses a transducer to transmit a plurality of sound signals and receive a plurality of signals reflected from the sample and bottom walls of the container to measure the liquid and / or container properties. The plurality of transmitted sound signals are generated during a plurality of transducer locations from the first container, and the system identifies signals that converge on various surfaces of the liquid and / or container and uses the reflected signals corresponding to those locations to calculate the sample and container properties.

The application discloses a noise reduction thin layer composite structure, which comprises a shell, a steel net, a thin layer sound absorbing body and a composite damping layer, the shell is an open cavity, one side of the thin layer sound absorbing body is connected with the steel net through pressing and the other side is connected with the composite damping layer through pressing, and both are installed in the shell; the composite damping layer comprises a damping layer, a shear body and an impedance matching layer, the shear body is periodically distributed on the surface of the side of the damping layer far from the thin layer sound absorbing body, and the impedance matching layer is an air layer enclosed by the shell and the damping layer. The application can have excellent low-frequency sound absorption and sound insulation performance under the condition of light and thin structure, meets the comprehensive requirements of outdoor weather resistance and installation adaptability, effectively reduces the influence of noise generated in the operation process of a transformer substation on the environment and residents, the characteristic size is in the range of deep sub-wavelength scale, is beneficial to realizing the optimization of low-frequency acoustic characteristics under the condition of limited thickness, has excellent low-frequency sound absorption performance and has tunable low-frequency sound absorption and insulation characteristics.

The invention relates to the technical field of digital cultural heritage protection, in particular to an ancient musical instrument digital duplicating method based on an acoustic modeling and 3D printing technology, which comprises the following steps: synchronously executing geometric structure data acquisition and acoustic characteristic data acquisition on an ancient musical instrument body to be duplicated; constructing a parameterized physical acoustic model based on the acoustic characteristic data; preparing a physical entity copy of the ancient musical instrument through an additive manufacturing technology by utilizing the geometric structure data; carrying out acoustic characteristic data acquisition on the physical entity copy to obtain an acoustic response of the physical entity copy; and carrying out comparative analysis on the acoustic response of the copy, the acoustic response of the original musical instrument body and the output of the physical acoustic model, and carrying out iterative optimization. Through a multi-dimensional data collaborative acquisition mechanism and a sound-shape fusion verification and iteration calibration process, high-precision digital reproduction of shape, sound and playing integration is realized, and the problem of shape and acoustic data separation in the background technology is solved.

The invention discloses a complex reservoir rock full-band sound wave velocity prediction and attenuation analysis method considering a pore structure and a multi-wave flow mechanism, and relates to the technical field of petrophysics and petroleum logging, the method comprises the following steps: constructing a multi-component digital rock based on X-ray CT and QEMSCAN, and extracting macropores; microcosmic pores are extracted through a high-resolution MAPS image, and a complex pore structure model is constructed; analyzing the static acoustic characteristics of the dry digital rock by adopting an elastic finite element method; on the basis, the influence of wave-induced flow in different scale spaces is considered, a new wave-induced flow mechanism of static flow-jet flow-Biot flow is provided, and a longitudinal wave and transverse wave speed prediction method of the rock with the complex pore structure is formed. According to the method, on the basis of digital rock, theoretical rock physics are fused, the rock sound wave velocity estimation method considering the pore structure and the microcosmic wave-induced flow mechanism is given, the frequency dispersion and attenuation characteristics of the rock sound wave velocity estimation method are determined, and a foundation is laid for subsequent reservoir logging evaluation.