Cortical analysis of auditory scenes and speech

Abstract

Event Abstract Back to Event Cortical analysis of auditory scenes and speech Shihab Shamma1* 1 University of Maryland, Maryland, United States Spectrotemporal modulations are critical in understanding the perception of complex sounds, especially in conveying intelligibility in speech and quality in music. Neurons in the primary auditory cortex extract and explicitly represent these modulations in their responses. In this talk, I shall review experimental methods to study the representation of these modulations in the cortex and the way they reveal the acoustic features of complex sounds such as phonemes. I shall also discuss various abstractions of this analysis to develop algorithms for the analysis of complex auditory scenes. One example is the question of how spectrotemporal modulation content of speech can be used to assess its intelligibility, to discriminate it from non-speech signals, and to enhance it by performing Weiner-like filtering in the space of the cortical representation. In music, these modulations underlie the perception of sound quality, and hence can be effectively employed to construct a perceptually-meaningful metric of musical timbre. Finally, I shall review recent extensions of these studies that explore the role of feedback and top-down attentional effects on the representation of modulations, measurements that are carried out while animals are engaged in a variety of auditory tasks. The resulting understanding of these rapid adaptive mechanisms has been formulated as algorithms for the segregation of complex sound mixtures to resolve difficult examples of the "cocktail-party problem". Conference: Bernstein Symposium 2008, Munich, Germany, 8 Oct - 10 Oct, 2008. Presentation Type: Oral Presentation Topic: All Abstracts Citation: Shamma S (2008). Cortical analysis of auditory scenes and speech. Front. Comput. Neurosci. Conference Abstract: Bernstein Symposium 2008. doi: 10.3389/conf.neuro.10.2008.01.002 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 11 Nov 2008; Published Online: 11 Nov 2008. * Correspondence: Shihab Shamma, University of Maryland, Maryland, Maryland, United States, sas@eng.umd.edu Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Shihab Shamma Google Shihab Shamma Google Scholar Shihab Shamma PubMed Shihab Shamma Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.