Information-theoretic Performance Analysis of Azimuthal Localization for Spatial-Auditory Display of Beamformed Sonar Data
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Summers, Jason
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Abstract
An information-theoretic model of azimuthal localization is presented.
The number of distinct source locations that can be encoded
by a set of head-related impulse response functions (HRIR)
is predicted in terms of information transfer as a function of the
properties of the source signal and a quantization interval that is
related to the level of internal perceptual noise. The model also
predicts how source locations should be distributed in azimuth in
order to maximize the information transferred through the set of
HRIR for a given set of input conditions. The predictions are
related to design considerations for a spatial-auditory display of
beamformed sonar data in which time series associated with fixed
beams of a one-dimensional array are mapped to virtual sources
located at fixed radius from the listener in the horizontal plane.
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Date
2010-06
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