Sound ray solid angle analogue simulation method and system of free sound field

Abstract

The invention discloses a sound ray solid angle analogue simulation method and system for a free sound field, and the method comprises the steps: setting a sound source position as an origin of coordinates, and building a three-dimensional coordinate system; establishing a spherical surface with the radius R by taking the origin of coordinates as a circle center; making a plane parallel to the XOY between R and + R along the z-axis of the three-dimensional coordinate system; in an XOY plane, taking O as a circle center, and making an equant circumferential angle; dividing the spherical surface into grids by utilizing a latitude circle and a longitude circle, wherein each grid is a grid surface element; calculating a solid angle of each grid surface element relative to the sphere center; setting a grid surface element midpoint through which any sound ray passes to determine a sound ray cluster equation; and performing free sound field sound ray analogue simulation through graphic programming and running software according to the solid angle and the sound ray cluster equation. According to the invention, sound direction distribution is visually displayed through graphs, and different distances from a sound source can be determined, i.e., the sound intensity of each field point is small.

Description

technical field [0001] The invention relates to the technical field of sound signal processing, in particular to a sound ray solid angle simulation method and system for a free sound field. Background technique [0002] At present, computer simulation technology provides new and effective methods and means for the study of sound field. In the existing technology, sound ray simulation mainly uses software programming to display rays from a certain point through graphic display. The point represents the position of the sound source, and the ray represents Sound rays, that is, the direction of sound propagation, thereby simulating the sound in all directions from the sound source. This method has the advantage of intuitive display, and the algorithm is its core and key, which determines the quality of the sound field simulation. [0003] The existing sound ray simulation technology is mostly schematic, that is, it is basically a qualitative display of rays diverging. The spati...

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Problems solved by technology

[0003] The existing sound ray simulation technology is mostly schematic, that is, it is basically a qualitative display of rays diverging. The spatial three-dimensional relationship of the rays representing sound rays is vague and unclear. It can only show where the sound is transmitted, but it cannot be scientific Quantize the size of the simulated sound, which is a key part of studying the sound field

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