M.Sc Thesis

M.Sc StudentBarak Lior
SubjectThe Effect of Head Posture on Spatial Hearing
DepartmentDepartment of Electrical and Computer Engineering
Supervisor PROFESSOR EMERITUS Arie Feuer


Humans are primarily visually oriented. However the hearing system provides us valuable information about our environment.

The human auditory system is capable, by itself, of detecting the spatial location of a sound source. Several methods were proposed in the past for simulating the natural spatial hearing by implementing a "virtual auditory s[ace" over headphones or loudspeaker set. This work concentrates on a subject that is mostly overlooked in spatial hearing simulation - the relative head-torso position. In the common spatial sound reproduction systems, the simulation is usually based on sound diffraction of the basic posture - looking straight forward. In real life, the head position is not limited, so it is natural to ask if a genuine simulation of spatial hearing should include the body - head relative orientation. This work explores the physical and psychoacoustic effects of such postures. Measurements   have been preformed for evaluating the effect of "not looking straight ahead" on the incoming sound. A simple geometric model has been used for explaining the results , and psychoacoustic tests have been preformed for estimating the effect of introducing the head -torso relative orientation information into spatial sound reproduction system.