Because human echolocation is often discussed as an auditory perceptual aid in navigation and object perception, it is appropriate to investigate quantitatively detection thresholds and the limits of spatial acuity that human echolocation affords its practitioners.
Spatial perception depends largely on relative localization, and this vernier method provides a means to characterize the resolution of auditory spatial acuity.
, defined as the highest visible spatial frequency one can distinguish, is roughly 40-50 cycles/deg for human foveal vision with gratings of high contrast (Bruce, Green, and Georgeson, 1996).
Playing with blocks has long been a favorite pastime of children and one that parents often encourage as a means of developing reasoning, spatial acuity
, and other skills.
Another key factor affecting perceived spatial acuity is reflectance.
Pendant-mounted indirect/direct fixture design can remedy the perception of brightness and spatial acuity in the lab.
Under optimal conditions, spatial acuity
of the visual system is finer than that of the auditory system, but auditory spatial resolution is sufficient to guide the field of best vision to the location of an acoustic source (Heffner & Heffner, 1992).
s] and [Zeta] allow a conservative estimate of the highest retinal slip speed that does not decrease spatial acuity.
This far exceeds observed retinal slip speeds, suggesting some other reason for image stability unrelated to spatial acuity.