| Abstrakt: |
The effects of (a) pretest training (two levels: Training, no-training), (b) stimulus elevation (0, ± 30°), (c) stimulus azimuthal angle (30, 60, 90 ... 0°), and (d) head movement (head rotate, head fixed) on the accuracy of monaural versus binaural directional hearing were examined using 72 university students tested in a mixed design experiment having stimulus azimuthal angle and head movement as the within-block treatments. The blindfolded subject sitting at the center of a clock face marked out on the floor of a sound-proofed room was required to verbally indicate using the clock numbers the direction of a 2-s pulsed white noise stimulus. Analyses revealed three, three-factor interactions and one, four-factor interaction,with one of the main results being the following: On their occluded side, untrained and head fixed monaural listeners were clearly inferior to binaurals; whereas, on their nonoccluded side their performance often matched that of binaurals. The implications of these interactions for the manipulation of variables and for the design of localization studies will be discussed. [ABSTRACT FROM AUTHOR] |
