Accession Number : AD0778141

Title :   Binocular Masking Level Differences in Sinusoidal Grating Detection.

Descriptive Note : Research rept.,

Corporate Author : DEFENCE AND CIVIL INST OF ENVIRONMENTAL MEDICINE DOWNSVIEW (ONTARIO)

Personal Author(s) : Henning,G. Bruce ; Hertz,B. Gevene

Report Date : 22 MAY 1973

Pagination or Media Count : 11

Abstract : Observers were required to detect sinusoidal gratings in a background of noise composed of a narrow band of spatial frequencies centred on the frequency of the grating to be detected. The visual noise was identical in two fields, one for each eye. The grating to be detected--the signal grating-- was presented in one of two conditions: either the signal grating was identical in both fields or 180 degrees out-of-phase; that is, with the dark bars in one field in locations corresponding to the locations for light bars in the other. Signal gratings of low spatial frequency presented out-of-phase were detected at much lower constrast than in-phase gratings. The difference in detectability with vertical gratings, approx. 0-6 log units of contrast, was at least as large with horizontal gratings. (Author)

Descriptors :   *Auditory signals, *Auditory perception, Noise, Frequency, Psychophysiology, Audiometry, Hearing, Psychoacoustics, Canada

Subject Categories : Psychology
      Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE