A sequence of sounds may be heard as coming from a single source (called fusion or coherence) or from two or more sources (called fission or stream segregation). Each perceived source is called a 'stream'. When the differences between successive sounds are very large, fission nearly always occurs, whereas when the differences are very small, fusion nearly always occurs. When the differences are...

Auditory scene analysis (ASA) refers to the ability of the auditory system to organize perceptually a sound mixture into distinct auditory streams, each stream ideally corresponding to a single sound source (see Bregman 1990 for a review). Level cues can be used to promote perceptual segregation of auditory objects. As such, temporal sequences of pure tone bursts with the same frequencies but w...

Sensory systems across the brain are specialized for their input, yet some principles of neural organization are conserved across modalities. The pattern of anatomical connections from the primate auditory cortex to the temporal, parietal, and prefrontal lobes suggests a possible division into dorsal and ventral auditory processing streams, with the dorsal stream originating from more caudal ar...

BACKGROUND Older adults with cerebrovascular accident (CVA) show evidence of auditory and speech perception problems. In present study, it was examined whether these problems are due to impairments of concurrent auditory segregation procedure which is the basic level of auditory scene analysis and auditory organization in auditory scenes with competing sounds. METHODS Concurrent auditory segr...

Recent findings demonstrate that audiovisual fusion during speech perception may involve pre-phonetic processing. The aim of the current experiment is to investigate this hypothesis using a pairing task between auditory sequences of vowels and non speech visual cues. The audio sequences are composed of 6 auditory French vowels alternating in pitch (or not) in order to build 2 interleaved stream...

It has been suggested that successively presented sounds that are perceived as separate auditory streams are represented by separate populations of neurons. Mostly, spectral separation in different peripheral filters has been identified as the cue for segregation. However, stream segregation based on temporal cues is also possible without spectral separation. Here we present sequences of ABA- t...