Localization cues of a spherical head model
* Presenting author
It is widely accepted that the accurate localization of sound source elevation re-lies on spectral cues originating from the fine structure of the human outer ear. However, weaker elevation dependent spectral cues can also be observed on a spherical head model with offset ears. They stem from sound travelling around the sphere in different ways, and thus reaching the ears at different times. This phenomenon causes elevation and azimuth dependent notch patterns, that are strongest for lateral source positions. Besides spectral cues, motion induced dy-namic cues are also known to improve the localization accuracy. This includes elevation dependent changes in the interaural time and level differences caused by a motion of the listener, or sound source. Again, these cues already exist on a spherical head model. In order to evaluate the relative influence of pinnae, head, and motion induced localization cues , we have analyzed numerically simulated transfer functions for ears only, for a head with and without ears, and for a spherical head model with and without offset ears.