Creation and calibration method of acoustical models for historic virtual reality auralizations
Creation and calibration method of acoustical models for historic virtual reality auralizations
复制标题
历史虚拟现实可听声学模型的创建和校准方法
作者：
Barteld N. J. Postma;B. Katz
虚拟现实为历史建筑和遗址的互动参观提供了可能性。目前的大多数虚拟重建都集中在创建逼真的虚拟环境，通过集中在视觉组件。然而，通过将更真实的声学特性纳入视觉模型，实现了更逼真的渲染研究场地。在历史的可听化，校准研究建筑物的房间声学仿真模型往往是必要的，来一个真实的表示其声学环境。本文提出了一种几何声学模型的有条理的校准程序，使用基于几何声学的室内声学预测程序来创建逼真的虚拟音频现实或可听化。为了开发这个程序，首先选择了一个小型未完工的圆形剧场，因为它一般很简单，而且混响水平相当高。根据声学测量结果对几何声学模型进行了标定。对模型标定过程中所采用的措施进行了分析，得出了一个有条理的标定过程。然后，将开发的程序应用于更复杂的建筑，即圣日耳曼德佩修道院教堂。所提出的程序的一个可能的应用是使交互式声学访问的建筑物的前配置。一个测试案例研究进行了一个典型的17世纪配置的圣日耳曼德佩。
Virtual reality provides the possibility for interactive visits to historic buildings and sites. The majority of current virtual reconstructions have focused on creating realistic virtual environments, by concentrating on the visual component. However, by incorporating more authentic acoustical properties into visual models, a more realistic rendering of the studied venue is achieved. In historic auralizations, calibration of the studied building’s room acoustic simulation model is often necessary to come to a realistic representation of its acoustical environment. This paper presents a methodical calibration procedure for geometrical acoustics models using room acoustics prediction programs based on geometrical acoustics to create realistic virtual audio realities, or auralizations. To develop this procedure, a small unfinished amphitheater was first chosen due to its general simplicity and considerable level of reverberation. A geometrical acoustics model was calibrated according to the results of acoustical measurements. Measures employed during the calibration of this model were analyzed to come to a methodical calibration procedure. The developed procedure was then applied to a more complex building, the abbey church Saint-Germain-des-Prés. A possible application of the presented procedure is to enable interactive acoustical visits of former configurations of buildings. A test case study was carried out for a typical seventeenth-century configuration of the Saint-Germain-des-Prés.