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Mandatory dichotic integration of second-formant information: Contralateral sine bleats have predictable effects on consonant place judgments
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Informational masking and the effects of differences in fundamental frequency and fundamental-frequency contour on phonetic integration in a formant ensemble
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Across-formant integration and speech intelligibility:effects of acoustic source properties in the presence and absence of a contralateral interferer
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Abstract:
The role of source properties in across-formant integration was explored using three-formant (F1+F2+F3) analogues of natural sentences (targets). In experiment 1, F1+F3 were harmonic analogues (H1+H3) generated using a monotonous buzz source and second-order resonators; in experiment 2, F1+F3 were tonal analogues (T1+T3). F2 could take either form (H2 or T2). Target formants were always presented monaurally; the receiving ear was assigned randomly on each trial. In some conditions, only the target was present; in others, a competitor for F2 (F2C) was presented contralaterally. Buzz-excited or tonal competitors were created using the time-reversed frequency and amplitude contours of F2. Listeners must reject F2C to optimize keyword recognition. Whether or not a competitor was present, there was no effect of source mismatch between F1+F3 and F2. The impact of adding F2C was modest when it was tonal but large when it was harmonic, irrespective of whether F2C matched F1+F3. This pattern was maintained when harmonic and tonal counterparts were loudness-matched (experiment 3). Source type and competition, rather than acoustic similarity, governed the phonetic contribution of a formant. Contrary to earlier research using dichotic targets, requiring across-ear integration to optimize intelligibility, H2C was an equally effective informational masker for H2 as for T2.
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URL: https://publications.aston.ac.uk/id/eprint/29022/ https://publications.aston.ac.uk/id/eprint/29022/1/Across_formant_integration_and_speech_intelligibility.pdf https://doi.org/10.1121/1.4960595
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Acoustic source characteristics, across-formant integration, and speech intelligibility under competitive conditions
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Acoustic Source Characteristics, Across-Formant Integration, and Speech Intelligibility Under Competitive Conditions
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Formant-Frequency Variation and Informational Masking of Speech by Extraneous Formants: Evidence Against Dynamic and Speech-Specific Acoustical Constraints
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Formant-frequency variation and its effects on across-formant grouping in speech perception
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The intelligibility of noise-vocoded speech:spectral information available from across-channel comparison of amplitude envelopes
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Effects of the Rate of Formant-Frequency Variation on the Grouping of Formants in Speech Perception
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The intelligibility of noise-vocoded speech: spectral information available from across-channel comparison of amplitude envelopes
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Auditory processing and the development of language and literacy
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