Separate auditory channels for unidirectional frequency modulation and unidirectional amplitude modulation.
D001306:Auditory Pathways / Q000502:physiology*; D001307:Auditory Perception / Q000502:physiology*; D001309:Auditory Threshold / Q000502:physiology; D006801:Humans; D008144:Loudness Perception / Q000502:physiology; D010898:Pitch Perception / Q000502:physiology; D011571:Psychoacoustics