TEMPORAL AND INTENSIVE FACTORS IN BINAURAL LATERALIZATION OF AUDITORY TRANSIENTS

The present experiment employed three experienced listeners. The primary purpose was to investigate the ability of the listener to detect a just noticeable shift from center of a dichotically produced auditory image. Thresholds were determined using a modification of Fechner's Method of Right and Wrong Cases. Thresholds were evaluated by means of an oscilloscope and camera. All combinations of a 600-Hz and a 6000-Hz tone and rise times of 10, 50, and 250 msec were used. Individual threshold plots are shown for each experimental condition. Tables are presented showing the intensity levels of the lead signal and the intensity differences between the two signals during the rise-time portion of the signal complex for the various values employed. A frequency-dependent relationship was indicated only for the 10-msec rise-time signal. It was also noted that time differences between equal intensity portions (of the two signals) are not constant throughout the rise time of the signals. © 1968, Acoustical Society of America. All rights reserved.