Understanding Pitch Perception as a Hierarchical Process with Top-Down Modulation
Figure 8
Model response to a high-pass-filtered click train with alternating inter-click intervals [49],[50].
(A) Central portion of the stimulus waveform (the total duration is 400 ms) for a click train with inter-click intervals alternating between 4 and 6 ms after high-pass filtering and the addition of a pink noise background. (B) Effective integration time, E2(t) (green solid line) and E3(t) (red dotted line) at the second and third stages of the model. (C) Model response at the third stage, A3(t,l), normalized and displayed as in previous figures. The arrow marks the lag corresponding to the pitch reported by listeners. (D) Final snapshot of A3(t,l) at tfinal. The vertical dashed line corresponds to the average pitch reported by listeners.