12 results about "Wave field synthesis" patented technology

The invention discloses an earphone space audio positioning method integrated with an MEMS sensor and a control system, and relates to the field of earphone space audio positioning. A temperature compensation MEMS sensor group and a microphone array are used for collecting motion data and sound wave signals, and signals are enhanced through orthogonal wavelet denoising and beam forming; the attitude is solved by adopting double-extended Kalman filtering and fusing data, and fuzzy logic is introduced to evaluate the credibility of the sensor; predicting a sound field by using a CNN model, and reconstructing the sound field in combination with an adaptive wave field synthesis technology; and based on auditory masking effect optimization balance, the influence of altitude on sound velocity is compensated. Through an ultra-precision sensor and an advanced algorithm, the positioning precision and reliability of earphone space audio are improved, and delay and power consumption are reduced; accurate sound source positioning, personalized sound field adaptation and cross-modal immersion experience in a complex scene are realized, and the audio experience of a user is improved.

The invention relates to a sound transducer arrangement (1) according to the principle of wave field synthesis, characterised in that at least one first sound transducer (11) is coupled to a respective acoustic low-pass filter device (5). The invention also relates to a method for operating a two-dimensional sound transducer arrangement.

The invention discloses a voiceprint continuous tracking system based on multi-mode space-time fusion and SE (3) manifold optimization and a tracking method thereof. The tracking method comprises the following steps: S1, acquiring an acoustic signal from a microphone array deployed on a user wearing device, inertial data from an inertial measurement unit, and optionally visual data from a camera; s2, estimating the real-time pose of the equipment worn by the user, wherein the pose is expressed on the SE (3) manifold; s3, defining a joint state vector of the sound source, wherein the state vector comprises a three-dimensional position and a voiceprint feature vector of the sound source in a world coordinate system; and S4, constructing a Bayesian filtering framework running on the SE (3) manifold, and utilizing the real-time pose. A wave field synthesis theory and a neural radiation field technology are combined, an extended acoustic NeRF model is constructed, a dynamic holographic sound field and spatially distributed voiceprint features are reconstructed in real time by using an estimated sound source state and a glasses pose, and visualization is carried out in XR equipment.

The invention discloses an annular loudspeaker array system for sound playback in a horizontal plane space, which comprises a central control module, a sound signal processing module, a loudspeaker array, a support module and a subject head position adjusting module, and is characterized in that the central control module is based on a personal computer and control software and is used for setting a playback mode and path distribution; the sound signal processing module is used for generating, transmitting and feeding sound signals in a specific playback mode; the loudspeaker array and the support module are used for providing accurate loudspeaker positions; the testee head position adjusting module can adapt to testees of different heights and body types, and the head center position of the testees is located in the center of the horizontal plane loudspeaker array. The device can support experiments of multiple sound playback modes such as discrete multi-channel sound and wave field synthesis and Ambosinics, and particularly, the loudspeaker array and the support module adopt an independent coordinate design, so that the height consistency of the annular loudspeaker array and the testee is ensured.

The present application relates to a kind of back wave field synthesis processing method, device, computer equipment and storage medium, method includes the following steps: respectively obtaining source back wave data and source wavelet data;According to source back wave data and source wavelet data, determine sparse linear filter coefficient;Using the numerical value of non-zero sparse linear filter coefficient and delay, time delay weighted superposition of forward wave field, synthesis back wave field.The above-mentioned back wave field synthesis processing method, based on source back data is the convolution of source wavelet data and sparse linear filter, determine sparse linear filter coefficient by source back data and source wavelet data, then according to the principle of superposition, time delay weighted superposition of forward wave field, synthesis back wave field.No need to rely on back data to obtain back wave field by solving wave equation, power is greatly reduced, can improve processing efficiency, reduce processing time, can also reduce memory consumption, so as to reduce power cost.

The invention relates to the technical field of sound source localization, in particular to a sound source direction localization method and system based on deep learning feature mapping, and the method comprises the steps: collecting an audio signal through an edge calculation front end of an integrated voice sensor array and a field programmable gate array, executing the neural generalized cross-correlation phase transformation, and carrying out the deep learning feature mapping; generating an acoustic feature tensor with denaturation such as displacement through a learnable filtering layer; inputting into a depth sound source localization network, carrying out space-time modeling by using a state space model, and resolving three-dimensional space coordinates; and outputting to a holographic sound rendering unit, and calculating an excitation amplitude parameter to reconstruct a holographic sound field. According to the method, the edge computing front end is combined with the depth sound source localization network, reverberation is suppressed by using a learnable filtering layer, the computing power bottleneck is broken through by means of linear computing complexity of a state space model, high-precision three-dimensional tracking is realized, a wave field synthesis algorithm is driven to synchronize a virtual sound source, and immersive experience is created.

Systems, methods, and apparatuses can include multi-dimensional loudspeaker modules having wave field synthesis (WFS) and / or beamforming capabilities. These systems, methods, and apparatuses can emit precisely controlled sound waves in a three-dimensional space, such as a venue, to create highly localized and customizable audio zones. These systems, methods, and apparatuses can include a Helmholtz resonator. Generally, the sound waves emitted by these systems, methods, and apparatuses can cause the Helmholtz resonator to oscillate to generate sound waves that interfere with the sound waves emitted by these systems, methods, and apparatuses. These systems, methods, and apparatuses can advantageously control the sound waves emitted by the Helmholtz resonator to constructively and / or destructively interfere with the sound waves emitted by these systems, methods, and apparatuses.

The invention relates to an indoor explosive ordnance disposal training device and system, the device comprises a simulation explosive, a camera, a score board, a visual module, an auditory module, a tactile module, an olfaction module and an explosive ordnance disposal suit, the visual module adopts a 4K OLED curved screen, the auditory module comprises a hidden loudspeaker array, the tactile module comprises a high-pressure gas explosion unit and the like, and the olfaction module comprises an atomization device. The system integrates subsystems such as a dynamic ring screen subsystem and a wave field synthesis subsystem, the explosive ordnance disposal suit is provided with various sensors to collect physiological and action data, action capture and behavior analysis are achieved in combination with an infrared camera and the like, and reports containing overall scores, sub-item radar maps and the like are generated through processing of the intelligent examination and evaluation system. The device and the system realize explosion scene high-fidelity simulation, objectively quantify and evaluate trainee ability, reduce training cost, improve safety and frequency, support modular upgrade, solve the defects of traditional training, provide an innovative scheme for explosive ordnance disposal training, and assist trainees to comprehensively improve actual combat ability.

The invention relates to a method for operating and / or arranging a two-dimensional acoustic transducer assembly (1) comprising a plurality of separately controllable acoustic transducers (9), in which the acoustic transducers (9) of the acoustic transducer assembly (1) each generate element waves according to the wave field synthesis principle and / or according to a beamforming method, which element waves are superimposed wavefronts, the local propagation direction for the at least one acoustic wave array is known or can be determined at each transducer (9) of the transducer assembly (1). At least one acoustic interference factor which causes a frequency-dependent and / or direction-dependent change in the acoustic pressure of at least one first acoustic transducer (9) of the acoustic transducer arrangement (1) is detected, and an input signal of the at least one first acoustic transducer (9) of the acoustic transducer arrangement (1) is coupled to at least one correction device, in particular a filter device, the at least one correction device adjusts the acoustic interference factor as a function of a local propagation direction of the at least one acoustic wave array surface on the at least one first acoustic transducer (9), in particular by minimizing the acoustic interference factor by means of a forward correction.

Systems, methods, and apparatuses can include multi-dimensional loudspeaker modules having wave field synthesis (WFS) and / or beamforming capabilities. These systems, methods, and apparatuses can emit precisely controlled sound waves in a three-dimensional space, such as a venue, to create highly localized and customizable audio zones. These systems, methods, and apparatuses can include a Helmholtz resonator. Generally, the sound waves emitted by these systems, methods, and apparatuses can cause the Helmholtz resonator to oscillate to generate sound waves that interfere with the sound waves emitted by these systems, methods, and apparatuses. These systems, methods, and apparatuses can advantageously control the sound waves emitted by the Helmholtz resonator to constructively and / or destructively interfere with the sound waves emitted by these systems, methods, and apparatuses.

The present invention relates to a method of operating and / or configuring a two-dimensional acoustic transducer assembly (1) comprising a plurality of individually controllable acoustic transducers (9), each of which generates superimposed elementary waves according to the principles of wavefield synthesis and / or according to beamforming methods to form at least one acoustic wavefront, the local propagation direction of the at least one acoustic wavefront being known or determinable at each transducer (9) of the transducer assembly (1).

The invention relates to a method for operating and / or setting up a two-dimensional sound transducer assembly (1) comprising a plurality of discretely controllable sound transducers (9), wherein the sound transducers (9) of the sound transducer assembly (1) each generate elementary waves which are superposed wavefrontaccording to the principle of wave field synthesis and / or according to beamforming methods to form at least one sound wavefront, wherein a local propagation direction for the at least one sound wavefront is known or can be determined at each transducer (9) of the transducer assembly (1). At least one acoustic disturbance factor which causes frequency-dependent and / or direction-dependent variations in the sound pressure of at least one first sound transducer (9) of the sound transducer assembly (1) is detected, and an input signal of the at least one first sound transducer (9) of the sound transducer assembly (1) is detected, and an input signal of the at least one first sound transducer (9) of the sound transducer assembly (1) is coupled to at least one correction device, in particular a filter device, which influences the acoustic disturbance factor depending on the local propagation direction of the at least one sound wavefront at the at least one first sound transducer (9), in particular by minimizing it by means of a forward correction.