Cross-linguistic and acoustic-driven effects on multiscale neural synchrony to stress rhythms.

Neural oscillations at delta and theta bands synchronize with stress and syllable rhythms.Hierarchical delta-theta phase coupling mirrors speech rhythm hierarchy.Language experience shapes multiscale brain-to-speech entrainment.Optimized brain-to-speech synchronization occurs at natural stress (2 Hz) and syllable (4 Hz) rates.Amplitude cues dominate the neural oscillatory encoding of stress rhythm.