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Spectral Integration of Dynamic Cues in the Perception of Syllable-Initial Stops

Abstract The present experiments examine the potential role of auditory spectral integration and spectral center of gravity (COG) effects in the perception of initial formant transitions in the syllables [da]-[ga] and [tha]-[kha]. Of interest is whether the place distinction for stops in these syllables can be cued by a ‘virtual F3 transition’ in which the percept of a frequency transition is produced by a dynamically changing COG. Listeners perceived the virtual F3 transitions comparably with actual F3 transitions although the former were less salient a cue. However, in a separate experiment, static ‘virtual F3 bursts’ were not as effective as actual F3 bursts in cueing the alveolar-velar place distinction. These results indicate that virtual F3 transitions can provide phonetic information to the perceptual system and that auditory spectral integration (completed by the central auditory system) may play a significant role in speech perception.