Figure 1.

ITD JND plotted as a function of time (relative to the day each subject began wearing their second sound processor). Stimuli were constant-amplitude, biphasic pulse trains (300-ms duration) with the repetition rate, subject, and interaural electrode pair identified in the legend. Symbols located above the axis break mark days when an ITD JND could not be measured (CNM) because the subject could not distinguish zero ITD from ITDs greater than 1500 μs or because stimulation of the interaural pair elicited multiple (non-fused) sound images. In cases where multiple measures were made using the same stimulus waveform on the same day, those runs were combined to determine the JND (see Sec. 2). Error bars represent the standard error of these multiple measurements.