Accession Number : AD0285570

Title :   CUEING SIGNALS AND FREQUENCY UNCERTAINTY IN AUDITORY DETECTION

Corporate Author : INDIANA UNIV BLOOMINGTON HEARING AND COMMUNICATION LAB

Personal Author(s) : GREENBERG,GORDON Z.

Report Date : JUL 1962

Pagination or Media Count : 1

Abstract : The cueing signal was relatively ineffective as an aid to detection during experiments when only a single frequency was employed. In other experiments, when additional frequency uncertainty was introduced by varying the relationship between the frequency of the cueing signal and that of the signal during the detection interval, detectability increased in the presence of the cueing signal. The results of these experiments do not support a simple sensory facilitation as the explanation for the increased detectability with the cueing signal. The results do support a description of the human listener's performance, by a narrow-band observer model rather than by a broad-band observer model. The narrowband observer model is supported further by consideration of the responses identifying the frequency of the cueing signal. Detectability during the detection interval was shown to be dependent upon the correctness of the frequency identification response. The aid to detection reported here would not be expected to greatly reduce a sizeable initial uncertainty. The increases in detectability, due to the introduction of the cueing signal were each of a magnitude less than 1 db. (Author)

Descriptors :   *HEARING, AUDIO FREQUENCY, HUMANS, PSYCHOACOUSTICS, SENSES(PHYSIOLOGY), ACOUSTIC SIGNALS, THRESHOLDS (PHYSIOLOGY)

Distribution Statement : APPROVED FOR PUBLIC RELEASE