Fig. 1: Timing of inter-syllabic and inter-vocalic intervals in a synthesised vs. naturally spoken train of syllables.
From: The timing of speech-to-speech synchronization is governed by the P-center

Temporal analyses of inter-syllabic (ISI) and inter-vocalic (IVI) intervals in the materials of Mares et al.1 (A, taken from the onset of a stimulus steadily paced at 4.3 units/second)46 as compared to the production of a male speaker articulating the same materials (here, syllables) in time with a metronome paced at the rate of 250 ms (B). Annotations of syllable and vowel onsets were conducted manually by the author.