Underwater sound propagation simulation method based on coupling method

Abstract

The invention belongs to the field of computer graphics and acoustics, and provides a novel method capable of interactively simulating the propagation effect of underwater sound containing a mobile interception source. According to the technical scheme adopted by the invention, the underwater sound propagation simulation method based on a coupling method comprises a scene preprocessing stage, a calculation preprocessing stage and an operation stage; in the scene preprocessing stage, a frequency boundary is determined according to size distribution of objects in a scene, and space division is performed: the scene is divided into boundary scattering, object scattering and medium scattering; in the calculation preprocessing stage, the scattering effect is considered to be combined with decomposition of a space field and a frequency field, and sound propagation losses of different scattering domains are calculated by adopting a ray tracing method and a simple positive wave method respectively. The method is mainly applied to sound processing occasions.

Description

technical field [0001] The invention belongs to the fields of computer graphics and acoustics, relates to scene modeling, geometric acoustics, numerical acoustics and ocean acoustics, and can realize sound propagation simulation of underwater scenes in virtual scenes. Background technique [0002] At present, sound propagation simulation technology enhances the reality of the virtual world by predicting the interaction between sound and the environment, and has become one of the important research contents of computer graphics. [0003] Among the numerical methods, the finite time domain difference method [1][2][3] was originally used to study the electromagnetic field problem, and it has been widely used in the sound field simulation and proposed a method based on adaptive rectangular decomposition [4] and based on graphics accelerator Accelerating the [5][6] finite time-domain difference solver. The finite time domain difference method is suitable for various media and te...

AI Technical Summary

Problems solved by technology

The boundary element method converts the three-dimensional problem of the sound field solution into a two-dimensional problem, which reduces the computational complexity, but there are also certain defects: a two-step calculation process is required; the matrices involved are all non-sparse matrices, which brings difficulties to efficient solutions ; and it only works for equations where the Green's function is well known

In summary, the existing techniques of graphics and ocean acoustics are not suitable for directly simulating sound propagation in underwater scenes

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