Current linguistic and neurobiological evidence indicates that prosody is organized hierarchically, with phrase-level and sentence-level features operating at distinct structural tiers.
The retrieved papers examine prosody across multiple units—such as syllables, words, phrase boundaries, and intonation units—confirming that distinct levels of prosodic organization are processed hierarchically in speech. Papers [6] and [8] explicitly model or demonstrate this hierarchical structure of prosody. No papers refute the claim.