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VIRTUAL ACOUSTIC MODEL FOR THE SIMULATION OF PASSING VEHICLE NOISE

机译：虚拟声学模型用于仿真传递车辆噪声

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摘要

In this paper a virtual acoustic model for the simulation of noise by passing vehicles is described. The underlying motivation for the acoustic model is the increasing demand for realistic traffic and acoustic disturbance simulation methods. For this purpose, simulation tools are desired, that allow simulation of different kinds of traffic scenarios within a Virtual Reality (VR) environment. This includes a plausible and realistic presentation of the acoustic situation. The virtual vehicle model introduced in this paper is composed of several individual sound sources, e.g. for the tires, the engine and the exhaust system. Each sound source has its own directional characteristics. These characteristics are considered by sets of digital filters for each sound source. For that purpose, measurement series with a car on a dynamometer were performed. Furthermore, in order to consider the environmental conditions a method for the description of sound reflections at simple objects (e.g. plane walls) is explained in this paper. The implemented concept offers the possibility to create individual mirror sources for every initial sound source and every object that can cause reflections. Since the concept is intended for the interactive application, the described method works in real time. In order to evaluate the described virtual acoustic model, a test with volunteers was performed. These examinations are also described and discussed in this paper.
机译：在本文中，描述了通过传递车辆模拟噪声的虚拟声学模型。声学模型的潜在动机是对现实交通和声扰仿真方法的需求越来越大。为此目的，需要仿真工具，允许模拟虚拟现实（VR）环境中的不同种类的流程。这包括声学情况的符号和现实呈现。本文介绍的虚拟车辆模型由几个单独的声源组成，例如，对于轮胎，发动机和排气系统。每个声源都有自己的方向特征。每个声源的数字滤波器组都考虑这些特征。为此目的，进行测量器上的带汽车的测量系列。此外，为了考虑环境条件，在本文中解释了用于在简单物体（例如平面壁）下进行声音反射的方法。实现的概念提供了为每个初始声源和可能导致反射的每个对象创建单个镜像源的可能性。由于该概念旨在用于交互式应用程序，所以所述方法实时工作。为了评估所描述的虚拟声学模型，进行了与志愿者的测试。本文还描述并讨论了这些检查。

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