Detecting temporal changes in acoustic scenes: The variable benefit of selective attention.

Laurent Demany, Yann Bayle, Emilie Puginier, Catherine Semal
Hearing Research. 2017-09-01; 353: 17-25
DOI: 10.1016/j.heares.2017.07.013

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1. Hear Res. 2017 Sep;353:17-25. doi: 10.1016/j.heares.2017.07.013. Epub 2017 Jul
27.

Detecting temporal changes in acoustic scenes: The variable benefit of selective
attention.

Demany L(1), Bayle Y(2), Puginier E(3), Semal C(4).

Author information:
(1)Institut de Neurosciences Cognitives et Intégratives d’Aquitaine, CNRS,
Université de Bordeaux, 146 rue Leo-Saignat, F-33076, Bordeaux, France.
Electronic address: .
(2)Institut de Neurosciences Cognitives et Intégratives d’Aquitaine, CNRS,
Université de Bordeaux, 146 rue Leo-Saignat, F-33076, Bordeaux, France.
Electronic address: .
(3)Institut de Neurosciences Cognitives et Intégratives d’Aquitaine, CNRS,
Université de Bordeaux, 146 rue Leo-Saignat, F-33076, Bordeaux, France.
Electronic address: .
(4)Institut de Neurosciences Cognitives et Intégratives d’Aquitaine, CNRS,
Université de Bordeaux, 146 rue Leo-Saignat, F-33076, Bordeaux, France; Institut
Polytechnique de Bordeaux, Ecole Nationale Supérieure de Cognitique, 109 avenue
Roul, F-33400, Talence, France. Electronic address:
.

Four experiments investigated change detection in acoustic scenes consisting of a
sum of five amplitude-modulated pure tones. As the tones were about 0.7 octave
apart and were amplitude-modulated with different frequencies (in the range
2-32 Hz), they were perceived as separate streams. Listeners had to detect a
change in the frequency (experiments 1 and 2) or the shape (experiments 3 and 4)
of the modulation of one of the five tones, in the presence of an informative cue
orienting selective attention either before the scene (pre-cue) or after it
(post-cue). The changes left intensity unchanged and were not detectable in the
spectral (tonotopic) domain. Performance was much better with pre-cues than with
post-cues. Thus, change deafness was manifest in the absence of an appropriate
focusing of attention when the change occurred, even though the streams and the
changes to be detected were acoustically very simple (in contrast to the
conditions used in previous demonstrations of change deafness). In one case, the
results were consistent with a model based on the assumption that change
detection was possible if and only if attention was endogenously focused on a
single tone. However, it was also found that changes resulting in a steepening of
amplitude rises were to some extent able to draw attention exogenously. Change
detection was not markedly facilitated when the change produced a discontinuity
in the modulation domain, contrary to what could be expected from the perspective
of predictive coding.

Copyright © 2017 Elsevier B.V. All rights reserved.

DOI: 10.1016/j.heares.2017.07.013
PMID: 28763678 [Indexed for MEDLINE]


Auteurs Bordeaux Neurocampus