Accession Number : AD0756679

Title :   Temporal Sensory Integration.

Descriptive Note : Final rept., 1 Feb 70-31 Dec 72,

Corporate Author : SYRACUSE UNIV N Y LAB OF SENSORY COMMUNICATION

Personal Author(s) : Zwislocki,Jozef J.

Report Date : FEB 1973

Pagination or Media Count : 83

Abstract : The existence of an actual process of temporal summation in the auditory nervous system has been reaffirmed and its manifestations further investigated. The process manifests itself in a reasonably straight forward manner in the acoustic reflex of the stapedius muscle, but the relationships appear to be much more complicated in temporal loudness effects. Under favorable conditions, listeners are able to follow two loudness criteria, one of instantaneous loudness, and one, of overall loudness. The instantaneous loudness appears to be nearly independent of stimulus duration, whereas, the overall loudness increases with the duration up to at least 500 msec. Similarly, the overall loudness of a pair of equally loud successive tone bursts of widely different frequencies is r eported as twice the loudness of each burst present singly. On the other hand, the loudness of a sound burst appears to be nearly unaffected by the presence of a preceding sound burst of equal loudness independent of their frequency relationship. However, the loudness of a sound burst is enhanced by a preceding burst of greater loudness. (Author Modified Abstract)

Descriptors :   (*AUDITORY PERCEPTION, NOISE), SOUND PITCH, SENSES(PHYSIOLOGY), THRESHOLDS(PHYSIOLOGY), AUDITORY NERVE, PSYCHOPHYSIOLOGY

Subject Categories : Psychology
      Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE