8 results about "Wave field synthesis" patented technology

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 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.

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.