Simulation Method of Indoor and Outdoor Sound Propagation Combined with Ray Tracing and Beam Tracing

A technology of sound propagation and simulation method, which is applied in the direction of instruments, calculations, and electrical digital data processing, etc., which can solve the problems of high time cost and low calculation efficiency, and achieve the effects of improving efficiency, improving accuracy, and shortening the calculation time of sound field

Active Publication Date: 2019-02-01
SUN YAT SEN UNIV
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Problems solved by technology

However, the calculation efficiency of this method is much lower than that of the acoustic beam tracking method. When simulating sound propagation in complex scenarios, it takes a lot of time to achieve a certain simulation accuracy.

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  • Simulation Method of Indoor and Outdoor Sound Propagation Combined with Ray Tracing and Beam Tracing
  • Simulation Method of Indoor and Outdoor Sound Propagation Combined with Ray Tracing and Beam Tracing
  • Simulation Method of Indoor and Outdoor Sound Propagation Combined with Ray Tracing and Beam Tracing

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Embodiment Construction

[0029] The drawings are for illustrative purposes only, and should not be construed as limitations on this patent; in order to better illustrate this embodiment, some parts in the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product;

[0030] For those skilled in the art, it is understandable that some well-known structures and descriptions thereof may be omitted in the drawings. The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] A method for simulating indoor and outdoor sound propagation that combines sound ray tracking and beam tracking. First, the outdoor space is divided into triangular prism-shaped subspaces according to the perimeter boundary of the building and the boundary of the calculation area, such as figure 1 As shown, the spatial subdivision results can be used as the basis for the accelerated acoustic beam tracking ...

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Abstract

The invention provides an indoor and outdoor sound transmission simulation method combining a ray tracing method with a sound beam tracing method. The method comprises the following concrete steps: firstly carrying out three-dimensional space partition on outdoor space, simulating outdoor transmission of a sound by utilizing the sound beam tracing method, when a sound beam meets doors and windows, partitioning the sound beam into a plurality of sub sound beams according to shapes of the doors and windows, recording the sub sound beams being about to enter indoor space while the rest sub sound beams are continuously transmitted outside, and continuously repeating the process until a preset sound transmission threshold is reached; and then obtaining a plurality of search included angle ranges of each sound source point through geometric operation by utilizing the recorded sub sound beams, wherein for each sound source point, sound rays are only transmitted in each of the recorded search included angle ranges, so that the ray tracing method can be utilized for simulating indoor sound transmission. The indoor and outdoor sound transmission simulation method is applied to sound field calculation of three-dimensional indoor and outdoor spaces, the regional sound field calculation efficiency can be effectively improved, and the indoor sound field calculation accuracy is guaranteed.

Description

technical field [0001] The invention relates to indoor and outdoor sound propagation of buildings, in particular to an indoor and outdoor sound propagation simulation method combined with a sound ray tracking method and a sound beam tracking method. Background technique [0002] With the development of social economy, the problem of noise pollution is becoming more and more serious. Among them, outdoor noise such as traffic noise, industrial noise, and construction noise is the main source of urban noise, which seriously affects the normal progress of people's rest, work and other living activities. By simulating the propagation of noise inside and outside the building, it can provide a basis for noise prevention and control. [0003] Ray tracing and beam tracing are two common methods for simulating sound propagation. [0004] The sound beam tracking method tracks the propagation of the sound with the sound beam as the unit, and this method has the advantage of high compu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG16Z99/00
Inventor 蔡铭高慧敏
Owner SUN YAT SEN UNIV
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