Stimuli and experimental protocol.

Abstract

(a) Example stimulus. (b) Cochleogram of the example stimulus. (c) Structure of SHMAX, which consists of alternate sparse coding layers (S layers) and max pooling layers (C layers). To avoid clutter, only S layers are displayed. The height of the feature maps in each S layer is indicated on the left, and the number of feature maps in each S layer is indicated at the top. The width of the feature maps (the temporal dimension) is not indicated because it varies according to the length of the input sentence. (d, e) Two example feature maps (activations of two features in response to the example stimulus) in layer S1. (f, g) Two example feature maps in layer S2. (h, i) Two example feature maps in layer S3.</p