Abstract：
:Humans can easily focus on one speaker in a multi-talker acoustic environment, but how different areas of the human auditory cortex (AC) represent the acoustic components of mixed speech is unknown. We obtained invasive recordings from the primary and nonprimary AC in neurosurgical patients as they listened to multi-talker speech. We found that neural sites in the primary AC responded to individual speakers in the mixture and were relatively unchanged by attention. In contrast, neural sites in the nonprimary AC were less discerning of individual speakers but selectively represented the attended speaker. Moreover, the encoding of the attended speaker in the nonprimary AC was invariant to the degree of acoustic overlap with the unattended speaker. Finally, this emergent representation of attended speech in the nonprimary AC was linearly predictable from the primary AC responses. Our results reveal the neural computations underlying the hierarchical formation of auditory objects in human AC during multi-talker speech perception.
journal_name
Neuronjournal_title
Neuronauthors
O'Sullivan J,Herrero J,Smith E,Schevon C,McKhann GM,Sheth SA,Mehta AD,Mesgarani Ndoi
10.1016/j.neuron.2019.09.007subject
Has Abstractpub_date
2019-12-18 00:00:00pages
1195-1209.e3issue
6eissn
0896-6273issn
1097-4199pii
S0896-6273(19)30780-9journal_volume
104pub_type
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