Auralization of Urban Environments - Real-time Simulation of Diffraction

城市环境的可听化 - 衍射的实时模拟

• 批准号: 274368052
• 负责人: Professor Dr. Michael Vorländer
• 金额: --
• 依托单位: Lehrstuhl und Institut für Hörtechnik und Akustik (IHTA)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/274368052?language=en
• 关键词: Auralization; Urban; Environments; Real; time

Within the call for proposals from DFG and FAPERJ, a research group from Brazil (UFRJ, Universidade Federal Rio de Janeiro) and a research group from Germany (RWTH, Rheinisch-Westfälische Technische Hochschule Aachen) apply for a joint project. The objective of this proposal is an advanced methodology to achieve a 3D sound simulation (auralization) in the application of noise propagation and assessment: Auralization of Urban Environments. In particular, the German group will mainly focus on real-time simulation of sound diffraction in urban environments. The simulation methodology will be based on Geometrical Acoustics. It refers to standard noise mapping calculations but it will extend the established procedures by frequency-dependent diffraction at finite edges represented as digital filters. The first step will be identifying the major propagation paths based on a scene geometry. Concentrating on these contributions will decrease the computational effort to derive diffraction filters from analytic models (Biot-Tolstoy, Medwin, Svensson, etc.). A strategy to control the computation efforts will be pursued by implementing approximations to efficiently model diffraction (Maekawa, UTD, Svensson, etc.). These basic diffraction objects have their algorithmic counter parts in likewise basic operations, which will be solved efficiently using shared-memory parallelization. The distribution handling of these basic calculations to the available resources (units of a multicore processor, nodes of a PC-cluster) require intelligent scheduling. In order to simplify the exchange of geometrical input data, the German and Brazilian researchers will settle on established data formats, such as CityGML. By making it possible to integrate these formats as basis for the sound propagation simulation and auralization, already existing data can be used directly (e.g. cadastral maps and digital representations of large cities). The Brazilian research team will also focus on appropriately visually capturing and acoustically recording urban dynamics. In a joint effort, the results of the Brazilian and German accomplishments will be finally evaluated and compared numerically and psycho-acoustically using both the very different city models and noise situations in Aachen and Rio de Janeiro.

在呼吁来自DFG和Faperj的建议的呼吁中，来自巴西（UFRJ，UFRJ，联邦里约热内卢大学）的研究小组和德国的研究小组（RWTH，RWTH，RHEINISCH-WESTFälischeTechnisische Hochschule Aachen）适用于联合项目。该提案的目的是在应用噪声传播和评估时实现3D声音模拟（听觉）的先进方法：城市环境的听觉化。特别是，德国团体将主要关注城市环境中声音衍射的实时模拟。模拟方法将基于几何声学。它指的是标准的噪声映射计算，但它将通过表示为数字过滤器的有限边缘的频率依赖性衍射扩展了已建立的过程。第一步将是基于场景几何形状识别主要的传播路径。专注于这些贡献将减少从分析模型（Biot-Tolstoy，Medwin，Svensson等）得出衍射过滤器的计算工作。通过实施近似值来有效建模衍射（Maekawa，Utd，Svensson等）来追求控制计算工作的策略。这些基本的衍射对象在同样基本操作中具有其算法计数器零件，这些操作将使用共享记忆并行化有效地求解。这些基本计算的分配处理对可用资源（多功能处理器的单位，PC群集的节点）需要智能调度。为了简化几何输入数据的交换，德国和巴西的研究人员将遵守已建立的数据格式，例如CityGML。通过使这些格式作为声音传播模拟和听觉的基础成为可能，可以直接使用现有的数据（例如，大型大型的ast as astral图和数字表示，巴西研究团队将在视觉上进行适当的视觉捕获和准确地记录城市动态。 Aachen和Rio de Janeiro的模型和噪音情况。