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dc.contributor.authorBrodbeck, Christian
dc.contributor.authorJiao, Alex
dc.contributor.authorHong, L Elliot
dc.contributor.authorSimon, Jonathan Z
dc.date.accessioned2020-11-04T16:22:08Z
dc.date.available2020-11-04T16:22:08Z
dc.date.issued2020-10-22
dc.identifier.urihttp://hdl.handle.net/10713/14032
dc.description.abstractHumans are remarkably skilled at listening to one speaker out of an acoustic mixture of several speech sources. Two speakers are easily segregated, even without binaural cues, but the neural mechanisms underlying this ability are not well understood. One possibility is that early cortical processing performs a spectrotemporal decomposition of the acoustic mixture, allowing the attended speech to be reconstructed via optimally weighted recombinations that discount spectrotemporal regions where sources heavily overlap. Using human magnetoencephalography (MEG) responses to a 2-talker mixture, we show evidence for an alternative possibility, in which early, active segregation occurs even for strongly spectrotemporally overlapping regions. Early (approximately 70-millisecond) responses to nonoverlapping spectrotemporal features are seen for both talkers. When competing talkers’ spectrotemporal features mask each other, the individual representations persist, but they occur with an approximately 20-millisecond delay. This suggests that the auditory cortex recovers acoustic features that are masked in the mixture, even if they occurred in the ignored speech. The existence of such noise-robust cortical representations, of features present in attended as well as ignored speech, suggests an active cortical stream segregation process, which could explain a range of behavioral effects of ignored background speech.en_US
dc.description.urihttps://doi.org/10.1371/journal.pbio.3000883en_US
dc.language.isoenen_US
dc.publisherPublic Library of Scienceen_US
dc.relation.ispartofPLoS biologyen_US
dc.subject.meshAuditory Cortexen_US
dc.subject.meshAuditory Perception--physiologyen_US
dc.titleNeural speech restoration at the cocktail party: Auditory cortex recovers masked speech of both attended and ignored speakersen_US
dc.typeArticleen_US
dc.identifier.doi10.1371/journal.pbio.3000883
dc.identifier.pmid33091003
dc.source.volume18
dc.source.issue10
dc.source.beginpagee3000883
dc.source.endpage
dc.source.countryUnited States


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