Figure 1.

Behavioral training methods and cochlear implantation in ferrets. A, A ferret fitted with BiCIs and speech processors carried within a backpack. Arrows point to the location of microphones. Backpacks were secured by harnesses that did not hinder the mobility of the animal. B, Measurement of head-orienting accuracy. A strip of adhesive reflective tape was placed on the animal's head (white strip), and changes in the x-y coordinates of the tape were captured at a rate of 50 Hz by an infrared camera mounted directly overhead. C, x-ray illustrating the position of the implant lead wires (arrows) that were tunneled subcutaneously to reach the bulla, behind the ear.