THE EFFECT OF EXPOSURE TO DICHOTIC NOISE ON THE DISCRIMINATION OF DICHOTIC TIME DIFFERENCES
MASSACHUSETTS MENTAL HEALTH CENTER BOSTON
Pagination or Media Count:
Subjects were exposed, under three conditions of motility, to a constantly changing auditory field produced by two separate noise-generating systems, each feeding the sound into one ear. After two hours of continuous exposure, eleven out of twelve ambulatory subjects showed increased variability in an auditory localization task, the discrimination of dichotic time differences. Performance after two hours under the same conditions of exposure deteriorated for only five out of twelve subjects when body movements were restricted. When the subjects were wheeled in a wheelchair, sitting quietly except for frequent head rotations, nine out of twelve subjects showed increased variability. That is, self-produced motion of at least the head, while listening to dichotic noise which masked background sounds, was necessary to disrupt accurate auditory localization.
- Acoustic Detection and Detectors
- Human Factors Engineering and Man Machine Systems