A Universal Rhythm Underlies Human Speech: 1.6-Second Intonation Units Discovered
2025-08-25
A groundbreaking study published in the Proceedings of the National Academy of Sciences reveals a universal 1.6-second rhythm in human speech, called intonation units. Analyzing over 650 recordings across 48 languages, researchers discovered this rhythmic chunking regardless of language family or geographic location. This rhythm isn't cultural; it's deeply rooted in human biology and cognition, mirroring brain activity patterns linked to memory, attention, and voluntary action. The findings have implications for AI speech development, speech disorder treatments, and a deeper understanding of neurological function.
(phys.org)