293 results about "Acoustic property" patented technology

The invention relates to the technical field of defect detection, and discloses a flange forging defect detection method and system. The method comprises the following steps: performing three-dimensional scanning and material acoustic characteristic measurement on a to-be-detected wind power flange to obtain layer partition sound isolation path data; generating an array element excitation control file of the double-array phased array ultrasonic detection system; applying the array element excitation control file to a double-array phased array ultrasonic detection system, and performing micro defect feature enhancement on a received echo signal to obtain a feature-enhanced signal data set; performing ultrasonic emission and data acquisition on the wind power flange to obtain a global detection data set; and inputting the global detection data set into the two-stage defect detection model for defect feature extraction and classification evaluation, and generating a defect detection evaluation report. According to the method, the detection rate and the classification accuracy of the micro forging defects are improved.

The air-pulse generating device comprises a film structure, operating at an ultrasonic operating frequency, and a resonant chamber, formed on a side of the film structure. A resonance is formed within the resonance chamber. Due to the resonant chamber, the APG device has a peak on a frequency response of an acoustic property of the APG device at the ultrasonic operating frequency.

The invention relates to the technical field of voiceprint recognition, in particular to a photovoltaic equipment fault detection method and system based on voiceprint recognition, and the method comprises the following steps: collecting the sound of the surrounding environment of a current photovoltaic power station, and building scene associated equipment spectrum peak features; according to the method, classification of environment sound is introduced in the sound acquisition stage, and scene association is performed on the operation sound of the photovoltaic equipment and the surrounding background sound in combination with Mel-frequency cepstrum coefficient extraction and acoustic scene recognition, so that a more targeted reference framework is provided for subsequent analysis. Modeling of multi-source sound features is achieved by synchronously collecting operation sound of an inverter and a cooling fan in equipment and extracting spectrum peak frequency points and amplitudes. In the signal processing process, multiple sub-bands are divided on the basis of scene correlation spectrum peak frequency points, so that each sub-band is aligned with the acoustic characteristics of equipment, the structural precision of short-time energy envelope extraction is improved, and it is ensured that the cross-correlation analysis result is more reliable.

A computer system outputs audio content via one or more audio output devices. If the audio content includes information that enables spatialization of the audio content, the system outputs the audio content in a simulated three-dimensional environment, including, if the audio content corresponds to a first category of content, causing the one or more audio output devices to simulate production of the audio content in a first virtual space, and if the audio content corresponds to a second category of content, causing the one or more audio output devices to simulate production of the audio content in a second virtual space that has different simulated acoustic properties than simulated acoustic properties of the first virtual space.

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 relates to the technical field of audio processing, and discloses a configuration method, system and device of a multi-room audio system and a storage medium, which are used for improving the accuracy of parameter adjustment of each audio device in the audio system. The configuration method of the multi-room audio system comprises the following steps: acquiring spatial layout information of each room and physical position information and performance parameters of each audio device; based on the spatial layout information of each room and the physical position information and performance parameters of each audio device, constructing an acoustic model comprising the plurality of rooms and the audio devices; analyzing an acoustic coupling relationship between different rooms and signal transmission characteristics of each audio device based on an acoustic model to obtain an acoustic characteristic parameter set; according to the acoustic characteristic parameter set, sound channel distribution and volume adjustment of each audio device are optimized, and an optimized audio configuration parameter set is obtained; and according to the optimized audio configuration parameter set, automatically configuring sound channel distribution, volume adjustment and audio signal transmission paths of the multi-room audio system.

This application provides a system for generating a drive signal and a method for generating a drive signal for driving a two-in-one device integrating a first component capable of generating sound and a second component capable of generating vibration. The system includes an audio signal pre-processing module, configured to perform low-frequency filtering and acoustic effect processing on an input signal according to a high-pass filtering parameter to obtain an audio signal; a vibration signal generation module, configured to generate a vibration signal based on an acoustic characteristic of the audio signal or a preset vibration library; a signal synthesis module, configured to superpose the audio signal with the vibration signal to output the drive signal; and an amplitude-limiting control module, configured to determine whether the audio signal and the vibration signal exceeds a maximum allowable range when superposed, and attenuate the audio signal and / or the vibration signal.

The invention provides an acoustic system control method based on a scene type and a related device, and the method comprises the steps: carrying out the comprehensive analysis of a scene based on the collected real-time scene data in a current site, and obtaining the scene type of the current site at each time; when it is monitored that the current site is switched from the first scene type to the second scene type, based on a first acoustic parameter corresponding to the first scene type and a second acoustic parameter corresponding to the second scene type, an acoustic system is controlled to be transitionally switched to a target acoustic parameter; environment data of the current site at the time corresponding to the second scene type are collected; optimizing the second acoustic parameter based on the environmental data to obtain an optimized acoustic parameter; and controlling acoustic output parameters of an acoustic system of the current site based on the optimized acoustic parameters. According to the method, the problem of adapting to dynamic changes of field acoustic characteristics is solved, a good acoustic effect can be obtained in various scenes and environments, and the sound quality of an acoustic system is improved.

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for generating an audio signal from input text. In one aspect, a method includes receiving a request to convert an input text to an audio signal, where the input text includes a plurality of lexical meta text inputs; generating, using a first generative neural network, a semantic representation of the lexical text input, the semantic representation comprising semantic terms representing semantic content of the lexical text input, each semantic term selected from a word list of semantic terms; generating an acoustic representation of the semantic representation using a second generative neural network and on at least the semantic representation, the acoustic representation comprising one or more respective acoustic lems representing acoustic properties of the audio signal; and processing the acoustic representation using a decoder neural network to generate an audio signal.

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 invention discloses a spatial sound effect test method and system for a sound system. The method comprises the following steps: S1, synchronously acquiring multi-modal sensing data of a test environment in a preset stage; s2, generating a three-dimensional sound pressure distribution thermodynamic diagram, and constructing an initial sound field model based on the three-dimensional sound pressure distribution thermodynamic diagram; s3, generating a corrected sound field model, and synchronously recording vibration data acquired by the triaxial accelerometer; s4, generating a sound image positioning trajectory diagram, and calculating a deviation angle between an actual sound image position and a theoretical position; and S5, determining the sound effect quality score of each test stage. According to the method, a closed-loop test framework of physical environment perception, sound field real-time modeling, man-machine interaction analysis and fault linkage traceability is constructed, a full-process test solution covering a hardware state, acoustic characteristics and human factor perception is provided for an immersive audio system, and the spatial sound effect reliability of digital playing equipment is remarkably improved.

A fluid treatment system includes: a liquid confinement structure configured to confine an immersion liquid to a space between at least a portion of the liquid confinement structure and a surface of a substrate, the liquid confinement structure having an aperture forming a passage therein for passage of a radiation beam to irradiate the surface of the substrate by passing through the immersion liquid; and a diagnostic tool configured to detect an abnormal condition in the fluid treatment system, the diagnostic tool comprising an acoustic system configured to measure acoustic characteristics of the liquid confinement structure and / or the immersion liquid, where the acoustic system comprises a transducer configured to emit an acoustic detection signal to and / or receive acoustic waves from the immersion liquid.

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.

According to the concrete strength-based automatic detection method provided by the invention, comprehensive and accurate evaluation on concrete surface strength distribution is realized in a mode of combining infrared thermal imaging and sound wave detection. The method comprises the following steps: firstly, acquiring an initial intensity distribution characteristic pattern by using an infrared thermal imaging technology, and optimizing and correcting according to environmental parameters; secondly, for the low-intensity suspicion area, acoustic characteristic parameters are obtained through acoustic wave detection equipment, and a specific intensity value is calculated; and finally, carrying out spatial superposition on the corrected thermal imaging data and the accurate sound wave detection data, generating a global concrete strength distribution map through an interpolation algorithm, and finally, carrying out rechecking through an automatic resiliometer. Compared with the traditional technology, that is, on-site constructors manually use a rebound apparatus to detect the wall, the method provided by the invention overcomes the limitation of a single detection method through organic combination of multiple detection means, remarkably improves the accuracy and comprehensiveness of concrete strength distribution detection, and has the advantages of reducing the use frequency of the rebound apparatus and reducing the construction cost. While the labor intensity of constructors is reduced, the accuracy of measuring and calculating the strength of the concrete member can be further improved.

The invention discloses a method and a system for generating a sound field capable of perceiving rhythm characteristics. The method comprises the following steps of: determining a group of acoustic guidance parameters containing target rhythm information, and driving an excitation mechanism to excite one or more physical resonators according to the acoustic guidance parameters so as to generate a basic acoustic environment of which the acoustic characteristics are completely dominated by the physical attributes of the resonators. The physical acoustic environment forms a sound field which covers a range of 1-100 Hz and has a perceivable rhythm characteristic through an endogenous acoustic beat effect or isochronous sound effect response of the physical acoustic environment. By returning the source of physical vibration, the technical defects of lack of physical reality and unnatural auditory experience of the existing electronic synthesis acoustic technology are solved, a sound field generation mode which is real and natural in acoustic performance and can be efficiently synchronized with a human body perception rule is created, and the sound field generation mode can be collaboratively presented with conventional audio to enhance immersion.

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.

Some implementations relate to methods, systems, and computer-readable media to reproduce a voice stream with removed personally identifiable information (PII). An original voice stream is received from a user by a hardware processor. The original voice stream is converted into text using a machine learning (ML) voice transcription model. Then, the text is used for generating an anonymized voice stream corresponding to the text having similar auditory properties to the original voice stream other than PII using a machine learning (ML) voice synthesis model. The similar properties are determined using metadata corresponding to the original voice stream. The metadata may be obtained by analyzing acoustic characteristics of the original voice stream. The metadata may include volume changes and pitch frequency changes stored as metadata annotations associated with tokens in the text as key-value pairs. The generation may use the metadata annotations to determine the similar audio properties.

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.

Methods and apparatus for lowering an actual and perceived-sound level produced by sports equipment are described. In some examples, methods and apparatus to lower sound levels produced by pickleball balls are described. In some examples, internal surface features such as ribs, peaks, tabs, channels, divots, and damping layers may be applied. In some examples, composite layered designs may result in lowered amplitude and / or in shifted resonant frequencies. In some examples, heat or light sources may be used to alter the internal surfaces of ball constructs. In some examples the composite layered design may include isolated surface plates. In some examples, electroactive components may reduce sound emission. Methods of measuring a sound level at frequencies and using the measurement results to iteratively design ball designs are described.

Methods, systems, and devices for determining an acoustic parameter of a downhole fluid using an acoustic assembly. Methods include transmitting a plurality of pulses; measuring values for at least one wave property measured for reflections of the plurality of pulses received at at least one acoustic receiver, including: a first value for a first reflection traveling a first known distance from a first acoustically reflective surface having a first known acoustic impedance, a second value for a second reflection traveling a second known distance substantially the same as the first known distance from a second acoustically reflective surface having a second known acoustic impedance, and a third value for a third reflection traveling a third known distance from a third acoustically reflective surface having a third known acoustic impedance substantially the same as the second acoustic impedance; and estimating the acoustic parameter using the values.

The invention discloses a precise pickup voice positioning method and device, a terminal and a storage medium. The method comprises the following steps: when a user enters a receiving range of a millimeter wave receiver, calculating first user position information according to a detection signal received by the millimeter wave receiver; when a wake-up instruction of the user is obtained, calculating second user position information according to the sound signal received by the microphone array; and calculating target user position information according to the first user position information and the second user position information. The millimeter wave receiver can provide high distance resolution and angle resolution, and a user can be accurately positioned. The microphone array may utilize acoustic characteristics of sound to locate a user in a horizontal direction and / or a vertical direction. According to the invention, the position information of the user is determined through the millimeter wave receiver and the microphone array, then the two pieces of position information are combined to obtain the accurate position information of the user, and accurate pickup positioning of the smart home is realized through a multi-sensor fusion mode.

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for generating an audio signal from input text. In one aspect, a method comprises receiving a request to convert input text into an audio signal, wherein the input text comprises multiple tokenized text inputs, generating, using a first generative neural network, a semantic representation of the tokenized text inputs comprising semantic tokens representing semantic content of the tokenized text inputs, each semantic token being selected from a vocabulary of semantic tokens, generating, using a second generative neural network and conditioned on at least the semantic representation, an acoustic representation of the semantic representation comprising one or more respective acoustic tokens representing acoustic properties of the audio signal, and processing the acoustic representation using a decoder neural network to generate the audio signal.

The invention relates to the technical field of ocean monitoring, and particularly discloses a transducer array-based seabed sound velocity gradient in-situ measurement device, which comprises a transducer array unit, a depth adjusting unit, a transmitting and receiving control unit and a data processing unit, the transducer array unit comprises a plurality of transmitting transducers and a plurality of receiving transducers, the plurality of transmitting transducers form a transmitting array, the plurality of receiving transducers form a receiving array, and the opening angles of the transducers in the transmitting array and the receiving array are set to ensure that the plurality of receiving transducers can receive signals from the transmitting array. A protective shell is arranged outside the transmitting array and the receiving array, and the strength of the protective shell is enough to ensure that the protective shell can penetrate into seabed sediments with various hardness degrees; the depth adjusting unit is respectively connected with the protective shells of the transmitting array and the receiving array; by adopting the technical scheme of the invention, fine measurement of the acoustic characteristics of the seabed shallow sedimentary layer can be realized.

A scalable conferencing system can include a set of conferencing devices configured to be placed on a surface (such as, a table), mounted on a ceiling, or attached to a wall. The conferencing devices can be configured to be positioned in a room and pick up and / or reproduce audio in the room. Depending on the configuration and / or characteristics of the room (such as, dimensions, geometry, acoustical properties, furnishings, or the like), a plurality of conferencing devices of a particular type can be deployed in the room and / or conferencing devices of another particular type may not be deployed. The conferencing system can be used for audio and / or video conferencing.

The invention relates to the technical field of digital twinning, in particular to a construction method of a digital twinning model of a sound field of electrical equipment. The method comprises the following steps: acquiring structural design data of the electrical equipment, and constructing a three-dimensional geometric model of the electrical equipment according to the structural design data of the electrical equipment, so as to obtain the three-dimensional geometric model of the electrical equipment; acquiring equipment acoustic characteristic data, and performing multi-material sound wave propagation analysis on the three-dimensional electrical equipment geometric model based on the equipment acoustic characteristic data so as to obtain multi-material sound wave propagation data; carrying out structural design optimization on the three-dimensional electrical equipment geometric model based on the multi-material sound wave propagation data so as to obtain equipment structural design optimization data; and performing acoustic simulation on the three-dimensional electrical equipment geometric model according to the equipment acoustic characteristic data so as to obtain acoustic simulation data. The acoustic performance and the noise suppression rate of the equipment are improved based on the digital twinning technology.

The invention provides an underwater environment area dynamic search method, which comprises the following steps of: transmitting and receiving a sound wave signal by using a multi-beam sonar system, obtaining a high-resolution underwater environment image, and extracting particle size distribution data of submarine sediments through image analysis; establishing a mapping model by combining the sound wave frequency and the sediment acoustic characteristics to calculate a scattering intensity distribution map; adopting a pattern recognition algorithm to recognize the sediment particle size and the sound wave incident angle, and correcting inertial navigation data errors; a spatial filtering parameter optimization model is established based on sediment particle size distribution, filtering parameters are adjusted to remove noise, and scattering signal features are extracted; the configuration of the receiving array and the search area are dynamically adjusted according to the particle size change of the sediment, accurate and real-time analysis and environment adaptability search of the particle size distribution of the underwater sediment are realized, and the efficiency and accuracy of underwater detection are greatly improved.