Getting the Cocktail Party Started: Masking Effects in Speech Perception

Evans, S., McGettigan, C., Agnew, Z.K., Rosen, S. and Scott, S.K. 2016. Getting the Cocktail Party Started: Masking Effects in Speech Perception. Journal of Cognitive Neuroscience. 28 (3), pp. 483-500. doi:10.1162/jocn_a_00913

TitleGetting the Cocktail Party Started: Masking Effects in Speech Perception
AuthorsEvans, S., McGettigan, C., Agnew, Z.K., Rosen, S. and Scott, S.K.
Abstract

Spoken conversations typically take place in noisy environments, and different kinds of masking sounds place differing demands on cognitive resources. Previous studies, examining the modulation of neural activity associated with the properties of competing sounds, have shown that additional speech streams engage the superior temporal gyrus. However, the absence of a condition in which target speech was heard without additional masking made it difficult to identify brain networks specific to masking and to ascertain the extent to which competing speech was processed equivalently to target speech. In this study, we scanned young healthy adults with continuous fMRI, while they listened to stories masked by sounds that differed in their similarity to speech. We show that auditory attention and control networks are activated during attentive listening to masked speech in the absence of an overt behavioral task. We demonstrate that competing speech is processed predominantly in the left hemisphere within the same pathway as target speech but is not treated equivalently within that stream and that individuals who perform better in speech in noise tasks activate the left mid-posterior superior temporal gyrus more. Finally, we identify neural responses associated with the onset of sounds in the auditory environment; activity was found within right lateralized frontal regions consistent with a phasic alerting response. Taken together, these results provide a comprehensive account of the neural processes involved in listening in noise.

JournalJournal of Cognitive Neuroscience
Journal citation28 (3), pp. 483-500
ISSN0898-929X
Year2016
PublisherMIT Press
Digital Object Identifier (DOI)doi:10.1162/jocn_a_00913
Publication dates
Published29 Jan 2016

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