Directional resolution required in HRTFs

Project Details


In binaural synthesis virtual sound sources are implemented by convolving reflection-free signals with HRTFs. This can be done with HRTFs measured in the implemented direction or by using HRTFs from directions close by that are interpolated to the desired direction. The goal of this project was to determine the lowest possible spatial resolution for which measured and interpolated transfer functions result in the same auditory impression. This has consequences for the amount of data that has to be stored in binaural synthesis systems, and for the number of measurements that have to be made when measuring the HRTFs of a group of people, for example. In this investigation measured and interpolated HRTFs were compared in a listening test. A criterion was found for the spatial resolution needed on the whole sphere. Supported by STVF/FTP.
Effective start/end date31/12/200531/12/2005