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. Author manuscript; available in PMC: 2016 Sep 10.
Published in final edited form as: Neuroscience. 2015 Jul 9;303:433–445. doi: 10.1016/j.neuroscience.2015.07.015

Figure 1.

Figure 1

Waveform (top: A1) and spectrograms (middle: A1, A2, A3, A4) of each of the four stimulus conditions illustrate the experimental paradigm used to acquire cortical responses. The waveform shows robust periodicity within the pitch segment (red) for A1, immediately preceded and followed by noise segments (black). f0 contours (middle: white) and corresponding acceleration trajectories (bottom) are displayed for all four IRN stimuli on a logarithmic scale spanning two octaves - from 100.8 Hz, the minimum stimulus frequency, to 400 Hz. The vertical dashed line (177 ms) pinpoints the location of the maximum pitch acceleration. A1 (0.3 Hz/ms), A2 (0.7), A3 (1.3), and A4 (2.7), pitch stimuli; IRN, iterated rippled noise; f0, voice fundamental frequency.