Fig. 5.

(A) ITDs measured from the external ear canals of sixteen adult ferrets (red lines) plotted as a function of lateral angle. Here, a negative lateral angle denotes a position to the animal's left. (B and C) ILDs measured from the external ear canals of adult ferrets (red lines; n = 16) for sounds filtered between 0.75 and 1.5 kHz (B) and 4 and 8 kHz (C) are plotted as a function of lateral angle. The confidence interval for the group mean is represented by the grey shaded area (5–95%). ITDs (D) and ILDs separated by frequency (E and F) measured from the “pockets” of a custom-made jacket worn by three adult ferrets are plotted in blue (mean + s.d.) as a function of lateral angle. For comparison, the confidence intervals for the external ear canal measurements are re-plotted in grey. Mean (+s.d.) ITDs (G) and ILDs separated by frequency (H and I) are shown for the external ear canal measurements in red and for the jacket pockets in blue.