Temporal fine structure mediated recognition of speech in the presence of multitalker babble.

Temporal fine structure mediated recognition of speech in the presence of multitalker babble.

J Acoust Soc Am. 2016 Oct;140(4):EL296

Authors: Nambi PM, Mahajan Y, Francis N, Bhat JS

Abstract
This experiment investigated the mechanisms of temporal fine structure (TFS) mediated speech recognition in multi-talker babble. The signal-to-noise ratio 50 (SNR-50) for naive-listeners was measured when the TFS was retained in its original form (ORIG-TFS), the TFS was time reversed (REV-TFS), and the TFS was replaced by noise (NO-TFS). The original envelope was unchanged. In the REV-TFS condition, periodicity cues for stream segregation were preserved, but envelope recovery was compromised. Both the mechanisms were compromised in the NO-TFS condition. The SNR-50 was lowest for ORIG-TFS followed by REV-TFS, which was lower than NO-TFS. Results suggest both stream segregation and envelope recovery aided TFS mediated speech recognition.

PMID: 27794309 [PubMed - in process]

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