Customizable Head Related Transfer Function

当声波从声源传播到耳鼓时，躯干、头部和外耳或耳廓的波长相关的衍射会使其频谱发生重大变化。这种变换的性质取决于声源相对于头部的位置，完全由所谓的头部相关传递函数来指定。由于头部相关的传递函数完全表征了可用于声音定位的声学信息，因此它已成为任何空间听觉科学研究的中心。头部相关传递函数的特征因人而异。这些受试者之间的差异通常是相当显著的，需要个性化的头部相关转移函数来获得对空间位置的忠实感知。假设基于物理的头部相关传递函数模型需要少量的自由参数，并且这些参数可以通过与实验测量的头部相关传递函数的统计匹配以及与人体测量的相关性来适应或定制到各个听众。这项工作将结合使用物理和数学方法来开发和验证与头部相关的传递函数模型。将进行广泛的心理学实验，以验证所产生的过滤器的充分性。这项研究对开发新型的人机界面和交互系统、三维听觉显示以及一些生物医学应用具有重要意义。

When a acoustic wave propagates from a sound source to the ear drum, wavelength-dependent diffraction by the torso, head and outer ears or pinnae produce major changes in its spectrum. The nature of this transformation depends on the location of the sound source relative to the head, and is completely specified by the so-called head-related transfer function. Because the head- related transfer function completely characterizes the acoustic information available for sound localization, it has become central to any scientific study of spatial hearing. The character of the head-related transfer function varies from person to person. These inter-subject variations are often quite significant, and individualized head-related transfer functions are needed to obtain a faithful perception of spatial location. It is hypothesized that a physically-based model of the head- related transfer function requires a small number of free parameters, and that these parameters can be adapted or customized to individual listeners by statistical matching against experimentally measured head-related transfer functions, and by correlation with anthropometric measurements. This effort will develop and validate head-related transfer function models using a combination of the physical and mathematical approaches. Extensive psychological experiments will be performed to validate the adequacy of the resulting filters. This research has significance for the development of novel man-machine interfaces and interactive systems, for three-dimensional auditory displays as well as for some biomedical applications.