Encoding of the acoustic parameters F0, F1, F2, VOT, and spectral peak in higher layers.

Abstract

The mean and standard deviation of decoding accuracies in 20-fold training and testing experiments are shown. (a) Decoding accuracies of F0, F1, and F2 based on the response amplitudes of all active layer C6 units. These accuracies are significantly higher than that of a random decoder (p−5). (b) Decoding accuracies of VOT and spectral peak based on the response amplitudes of all active layer C6 units. These accuracies are significantly higher than that of a random decoder (p−5). (c) Decoding accuracies of acoustic parameters based on the response amplitudes of active layer C6 units in six different groups. These accuracies are significantly higher than that of a random decoder (p−5). (d) Average decoding accuracies of the acoustic parameters in layers S4, C4, S5, C5, S6, and C6. The six groups of units are presented in the same order as in (c) (from left to right: plosive, fricative, nasal, low back, low front, and high front). In all panels, error bars indicate standard deviation over 20 accuracies. To avoid clutter, error bars in (d) are not shown.</p