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Article Dans Une Revue Acta Acustica united with Acustica Année : 2012

The Relationship Between Concurrent Speech Segregation, Pitch-Based Streaming of Vowel Sequences, and Frequency Selectivity

Résumé

Simultaneous and sequential segregation form the basis of auditory scene analysis and are likely involved in concurrent speech segregation. However, previous work showed that speech-in-noise perception wasu ncorrelated with simultaneous segregation, whereas it appeared to be related to the pure-tone fusion threshold of sequential streaming. The current study aimed to clarify the relationships between pitch-based speech-in-speech segregation , pitch-based streaming, and frequencyselectivity.T wenty-three listeners with close to normal hearing were involved. Speech-in-speech perception wasmeasured using words presented in atime-reversed single talker background , with various pitch differences between target and masker.Streaming performance wasmeasured using an objective order-naming task on vowel sequences. Auditory filter widths were derivedusing anotch-noise method. Results showed acorrelation between the effect of pitch on speech-in-speech perception and the effect of pitch on streaming performance. However, frequencyselectivity wasfound to correlate with average speech-in-speech perception butnot with streaming, and only in the region of the second formant. These latter results are consistent with the hypothesis that pitch-based streaming probably relies on pitch discrimination, which is only poorly correlated to frequencyselectivity.Further,these results suggest that mild impairments in frequencyselectivity do not systematically impair pitch-based streaming.
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hal-02144518 , version 1 (25-08-2020)

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Etienne Gaudrain, Nicolas Grimault, Eric W. Healy, Jean-Christophe Bera. The Relationship Between Concurrent Speech Segregation, Pitch-Based Streaming of Vowel Sequences, and Frequency Selectivity. Acta Acustica united with Acustica, 2012, 98 (2), pp.317-327. ⟨10.3813/AAA.918515⟩. ⟨hal-02144518⟩
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