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Inspiracją do niniejszych badań była chęć odpowiedzi na pytanie .. whether robust speech
perception, despite the envelope distortions imposed by real-world rooms, is mirrored by a cortical entrainment mechanism that is robust to these distortions?
In the present study, we examined the effects of selective attention
on cortical entrainment to competing speech streams in different reallife
Using acoustic simulations,
we created virtual auditory scenes...
We measured ongoing scalp
EEG while the subjects selectively attended to a particular talker embedded in these different scenes. Using stimulus reconstruction to
derive envelopes of attended speech streams from single-trial EEG, we
investigated (i) whether the clean envelope of an attended speech
stream could be reconstructed from a distorted input when speech
perception is robust, and (ii) whether this might facilitate the decoding
of the attended talker in real-world acoustic scenes. We hypothesized
that attention promotes noise-robust neural representations of attended
sound streams such that attended speech envelopes reconstructed
from cortical EEG resemble the clean signals to a similar or
even higher degree than the distorted input. Such a cortical robustness
would allow attention decoding accuracies in real-world acoustic
scenes that are similar to those observed with undistorted signals.