Cascaded Tuning to Amplitude Modulation for Natural Sound Recognition.

ABSTRACT: The auditory system converts the physical properties of a sound waveform to neural activities and processes them for recognition. During the process, the tuning to amplitude modulation (AM) is successively transformed by a cascade of brain regions. To test the functional significance of the AM tuning, we conducted single-unit recording in a deep neural network (DNN) trained for natural sound recognition. We calculated the AM representation in the DNN and quantitatively compared it with those reported in previous neurophysiological studies. We found that an auditory-system-like AM tuning emerges in the optimized DNN. Better-recognizing models showed greater similarity to the auditory system. We isolated the factors forming the AM representation in the different brain regions. Because the mo

SUBMITTER: Koumura T 

PROVIDER: S-EPMC6616280 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature