Evaluation of virtual acoustic environments

该分项目将利用不同的战略，最大限度地提高双耳模拟的质量，作为联合体的中央评价平台。基于对现有技术系统的缺点的分析，将通过对可重复性和真实性的严格测试来评估具有个性化耳机均衡和具有最小相位插值的个体ITD缩放的耳外耳机的益处，可重复性和真实性被定义为关于内部或外部参考的感知身份，开发的双耳参考系统将用于记录和可听化自然声学环境的代表性样本，并创建联合体中使用的所有扬声器阵列系统的双耳表示。在子项目P3-P9中进行感知评估。一个新的HRTF数据库将获得高空间分辨率和不同方向的头部以上躯干。这些都是数字模拟环境（P1，P2）的可听化和消声条件下的所有其他评估所需的。基于所记录的HRTF/BRIR，将对不同的插值方法进行比较评估，将开发一个针对虚拟声学环境质量的共识词汇表，作为与信号链上沿着各种系统参数相关的分类。将提供用于执行感知评估的软件，包括所需的所有测试范例和方法，并能够直接驱动联合体中使用的所有模拟系统。因此，一个全面的收集的方法，工具和数据的虚拟声学环境的评估开发，必要的拟议财团和相当大的价值，为更大的声学社区后的项目。

The subproject will exploit different strategies to maximize the quality of binaural simulations to be used as a central evaluation platform for the consortium. Based on an analysis of shortcomings of state of the art systems, the benefit of extraaural headphones with individualized headphone equalization and individual ITD scaling with minimum phase Interpolation will be evaluated with a strict test on plausibility and authenticity, defined as the perceptual identity with regard to an internal or external reference, respectively.The developed binaural reference system will be used to record and auralize a representative sample of natural acoustic environments and to create binaural representations of all loudspeaker array systems used in the consortium - required for perceptual evaluations in subprojects P3-P9. A new database of HRTFs will be acquired with high spatial resolution and for different orientations of head above torso. These are required for the auralization of numerically modelled environments (PI, P2) and for all other evaluations under anechoic conditions. Based on the recorded HRTFs/BRIRs, different interpolation methods will be comparatively evaluated.A consensus vocabulary for the qualities of virtual acousfic environments shall be developed, serving as a taxonomy to be related to a variety of system parameters along the signal chain. A software for performing perceptive evaluations will be provided, including all tests paradigms and methods required and able to drive all simulation systems used in the consortium direcly. Thus, a comprehensive collection of methods, tools, and data for the evaluation of virtual acoustic environments is developed, essential for the proposed consortium and of considerable value for the larger acoustical community after the project.