Acoustic source characteristics, across-formant integration, and speech intelligibility under competitive conditions

Journal of Experimental Psychology. Human Perception and Performance
Brian RobertsPeter J Bailey

Abstract

An important aspect of speech perception is the ability to group or select formants using cues in the acoustic source characteristics--for example, fundamental frequency (F0) differences between formants promote their segregation. This study explored the role of more radical differences in source characteristics. Three-formant (F1+F2+F3) synthetic speech analogues were derived from natural sentences. In Experiment 1, F1+F3 were generated by passing a harmonic glottal source (F0 = 140 Hz) through second-order resonators (H1+H3); in Experiment 2, F1+F3 were tonal (sine-wave) analogues (T1+T3). F2 could take either form (H2 or T2). In some conditions, the target formants were presented alone, either monaurally or dichotically (left ear = F1+F3; right ear = F2). In others, they were accompanied by a competitor for F2 (F1+F2C+F3; F2), which listeners must reject to optimize recognition. Competitors (H2C or T2C) were created using the time-reversed frequency and amplitude contours of F2. Dichotic presentation of F2 and F2C ensured that the impact of the competitor arose primarily through informational masking. In the absence of F2C, the effect of a source mismatch between F1+F3 and F2 was relatively modest. When F2C was present, inte...Continue Reading

Citations

May 23, 2015·The Journal of the Acoustical Society of America·Brian Roberts, Robert J Summers
Mar 21, 2019·Attention, Perception & Psychophysics·Marjorie FreggensMark A Pitt
Jun 18, 2017·The Journal of the Acoustical Society of America·Yiyuan Han, Fei Chen
Feb 13, 2020·ELife·Christopher BergevinBrad Story
Mar 3, 2018·The Journal of the Acoustical Society of America·Brian Roberts, Robert J Summers
May 3, 2018·The Journal of the Acoustical Society of America·Richard M WarrenPeter W Lenz
Nov 4, 2020·The Journal of the Acoustical Society of America·Brian Roberts, Robert J Summers

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