Visual and Auditory Sensitivities and Discriminations

Abstract

Self-motion causes large errors in estimates of time to collision (TTC) based on monocular information (i.e. tau), errors that improve the margin of safety. When moving in a straight line (e.g. NOE flight) closing speed adaptation can produce potentially dangerous errors in estimating TTC. A new equation gives TTC from binocular information without involving distance. The human visual system contains a mechanism that rapidly compares contours at two distant sites so as to encode the location size and shape of an object. Contours may be defined by luminance or motion in depth contrast. Spatial frequency discrimination for cyclopean gratings is little inferior to that for luminance gratings, and seems to be supported by opponent processing. Evoked potential recording showed an inverse oblique effect for cyclopean gratings. Amplitude- and frequency-modulated auditory tones differ only in phase spectra, but the ear's hair cells introduce a difference in power spectra. This finding may be important for theories of speech processing.

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Document Details

Document Type
Technical Report
Publication Date
Mar 03, 2003
Accession Number
ADA414861

Entities

People

  • David M. Regan

Organizations

  • University of York

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Aircrafts
  • Cognition
  • Collision Avoidance
  • Collisions
  • Computational Science
  • Detectors
  • Electrophysiological Phenomena
  • Fixed Wing Aircraft
  • Flight Simulators
  • Frequency
  • Medical Personnel
  • Neural Pathways
  • Power Spectra
  • Psychology
  • Simulators
  • Standards
  • Three Dimensional

Readers

  • Human-Computer Interaction (HCI).
  • Radar Systems Engineering.
  • Speech Processing/Speech Recognition.