Understanding Pitch Perception as a Hierarchical Process with Top-Down Modulation
Figure 7
Comparison between human and model pitch-gap and pitch-modulation thresholds in a task specifically designed for assessing temporal resolution in pitch perception (see text for details).
(A) Spectrogram for a rippled noise (RN) with a 4-ms delay, which contains a 25-ms gap in serial correlation around the centre of the stimulus, not visible in the figure. (B) First peak height of the running autocorrelation as a function of time (Rh1[t]) for both the modulated (red) and gap (blue) RN stimuli; averaged over 105 stimulus realizations. (C) A3(t,l), for the stimulus shown in panel A, normalized and displayed as in previous figures. (D) Average detection thresholds and standard errors for the pitch-gap (blue circles) and pitch-modulation conditions (red triangles). The corresponding model predictions are shown in the same colours (dots and stars).