# How the brain separates sounds Robert P. Carlyon **Opening (not a real abstract):** What cues do listeners use to segregate sounds? When answering this question, it is useful to draw a distinction between two broad classes of phenomenon. One, known as ‘auditory streaming’, concerns the perceptual organization of sounds over time. It is widely exploited by composers of music, and forms the basis of our ability to track one speaker in the presence of interfering speech. Streaming is usually studied using quite simple stimuli, such as the tone sequence shown in Figure 1a (originally due to L.P.A.S. von Noorden, PhD thesis, Eindhoven Corresponding author: Robert P. Carlyon ([email protected]). **Authors:** [[Robert P. Carlyon]]