Auditory Scene Analysis: The Perceptual Organization of Sound

1994 ◽  
Vol 95 (2) ◽  
pp. 1177-1178 ◽  
Author(s):  
Albert S. Bregman ◽  
Stephen McAdams
Keyword(s):  
Perceptual Organization ◽  
Auditory Scene Analysis ◽  
Scene Analysis ◽  
Auditory Scene

scholarly journals Functional brain networks underlying perceptual switching: auditory streaming and verbal transformations

2012 ◽  
Vol 367 (1591) ◽  
pp. 977-987 ◽  
Author(s):  
Makio Kashino ◽  
Hirohito M. Kondo
Keyword(s):  
Perceptual Organization ◽  
Brain Activity ◽  
Auditory Scene Analysis ◽  
Scene Analysis ◽  
Switching Frequency ◽  
Auditory Streaming ◽  
Auditory Scene ◽  
Functional Brain Networks ◽  
Fmri Analysis ◽  
Perceptual Changes

Recent studies have shown that auditory scene analysis involves distributed neural sites below, in, and beyond the auditory cortex (AC). However, it remains unclear what role each site plays and how they interact in the formation and selection of auditory percepts. We addressed this issue through perceptual multistability phenomena, namely, spontaneous perceptual switching in auditory streaming (AS) for a sequence of repeated triplet tones, and perceptual changes for a repeated word, known as verbal transformations (VTs). An event-related fMRI analysis revealed brain activity timelocked to perceptual switching in the cerebellum for AS, in frontal areas for VT, and the AC and thalamus for both. The results suggest that motor-based prediction, produced by neural networks outside the auditory system, plays essential roles in the segmentation of acoustic sequences both in AS and VT. The frequency of perceptual switching was determined by a balance between the activation of two sites, which are proposed to be involved in exploring novel perceptual organization and stabilizing current perceptual organization. The effect of the gene polymorphism of catechol- O -methyltransferase (COMT) on individual variations in switching frequency suggests that the balance of exploration and stabilization is modulated by catecholamines such as dopamine and noradrenalin. These mechanisms would support the noteworthy flexibility of auditory scene analysis.

scholarly journals Neural mechanisms of rhythmic masking release in monkey primary auditory cortex: implications for models of auditory scene analysis

2012 ◽  
Vol 107 (9) ◽  
pp. 2366-2382 ◽  
Author(s):  
Yonatan I. Fishman ◽  
Christophe Micheyl ◽  
Mitchell Steinschneider
Keyword(s):  
Auditory Cortex ◽  
Perceptual Organization ◽  
Primary Auditory Cortex ◽  
Auditory Scene Analysis ◽  
Neural Mechanisms ◽  
Stream Segregation ◽  
Scene Analysis ◽  
Neural Basis ◽  
Masking Release ◽  
Auditory Scene

The ability to detect and track relevant acoustic signals embedded in a background of other sounds is crucial for hearing in complex acoustic environments. This ability is exemplified by a perceptual phenomenon known as “rhythmic masking release” (RMR). To demonstrate RMR, a sequence of tones forming a target rhythm is intermingled with physically identical “Distracter” sounds that perceptually mask the rhythm. The rhythm can be “released from masking” by adding “Flanker” tones in adjacent frequency channels that are synchronous with the Distracters. RMR represents a special case of auditory stream segregation, whereby the target rhythm is perceptually segregated from the background of Distracters when they are accompanied by the synchronous Flankers. The neural basis of RMR is unknown. Previous studies suggest the involvement of primary auditory cortex (A1) in the perceptual organization of sound patterns. Here, we recorded neural responses to RMR sequences in A1 of awake monkeys in order to identify neural correlates and potential mechanisms of RMR. We also tested whether two current models of stream segregation, when applied to these responses, could account for the perceptual organization of RMR sequences. Results suggest a key role for suppression of Distracter-evoked responses by the simultaneous Flankers in the perceptual restoration of the target rhythm in RMR. Furthermore, predictions of stream segregation models paralleled the psychoacoustics of RMR in humans. These findings reinforce the view that preattentive or “primitive” aspects of auditory scene analysis may be explained by relatively basic neural mechanisms at the cortical level.

Auditory Scene Analysis: The Perceptual Organization of Sound

1991 ◽  
Vol 15 (2) ◽  
pp. 74
Author(s):  
Stephen Smoliar ◽  
Albert S. Bregman
Keyword(s):  
Perceptual Organization ◽  
Auditory Scene Analysis ◽  
Scene Analysis ◽  
Auditory Scene

Attention effects on auditory scene analysis: insights from event-related brain potentials

2014 ◽  
Vol 78 (3) ◽  
pp. 361-378 ◽  
Author(s):  
Mona Isabel Spielmann ◽  
Erich Schröger ◽  
Sonja A. Kotz ◽  
Alexandra Bendixen
Keyword(s):  
Auditory Scene Analysis ◽  
Scene Analysis ◽  
Brain Potentials ◽  
Auditory Scene
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