The aim of the present study was to highlight and develop the expressive relationships (in Leibniz's sense of the term) between certain phenomenological and neurophysiological aspects of perception, consciousness, and time. My emphasis was on auditory perception since nearly all perceived qualities in hearing — from rhythm and duration to pitch and localization — are most intimately related to temporal patterns and regularities. Analogies were shown between the structural features of perceptual states, as dealt with in philosophical phenomenology, and the structural features of their physical counterparts, as dealt with in neurophysiology.