Fig. 6.

A, Linear phase plot of a peak-type (CP, +0.06) neuron with a CD of +294 μsec. B, ITD functions for all of the frequencies examined in A using binaural beats, open circles are 150 and 200 Hz,lines only are 250–350 Hz, filled circles are 400–600 Hz. Vertical line indicates the CD. C, PSTH of the response to 1 Hz binaural beats at 324 Hz and 70 dB SPL (open bars) alone and presented simultaneously with a 600 Hz suppressor (lines).D, IPD histogram constructed from the response in partC. E–H, Responses to binaural beats at 70 dB SPL alone (open bars) and presented simultaneously with a 600 Hz suppressor (lines) or a 200 Hz suppressor (gray bars) for stimulus frequencies of 250 (E), 300 (F), 350 (G), and 400 (H) Hz.I, Phase plot showing BPs from the original phase plot in A that were not reexamined with a suppressor (filled circles), those that were reexamined in conjunction with the 600 Hz suppressor (open circles), and the 200 Hz suppressor (crosses). J, ITD functions for the putative lower-frequency input. K, ITD functions for the putative upper-frequency input.