Abstract
Angular spatial resolution using a new design of spatial sensor has been compared with those reported in the literature [L. Kay, Animal Sonar Systems, edited by R. G. Busnel and J. F. Fish (Plenum, New York, 1980), Chap. 6]. Subjects were required to count the number of vertical rods placed at constant radial distance in the field of view of the sensors. The number of rods and their angular spacing were varied randomly. Two binaural sensors A and B had field of view of 60° and 35°, respectively. A monaural sensor C had a field of view of 10° and the new sensor D had a binaural field of view of 47° upon which was superimposed a central monaural sensing field of 1O°. Special envelope shaping of the signals from sensor D emphasized the characteristic echo quality in the central field and the binaural section was especially sensitive to relative lateral motion. Correct counts (at the 75% level) were obtained for angular spacing of (sensor A) 46°, (sensor B) 20° (sensor C) 8°, and(sensor D) 11°. Increasing the...
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