Intonation Units - tone groups - a universal rhythm?

I used NotebookLM to produce this video overview based on just these two articles:

• Sequences of intonation Units form a ~ 1 Hz rhythm 
  Maya Inbar1,2, Eitan Grossman1 & Ayelet N. Landau2*
  
  
• A universal of speech timing: Intonation units form low- frequency rhythms Maya Inbara,b,c,1 , Eitan Grossmana , and Ayelet N. Landaub,c,d

I asked NotebookLM, "Can you explain in simple terms what intonation units are and what other names have been given to them?

And got this reply based on these two sources:

Intonation units (IUs) are the fundamental building blocks of human speech. Instead of speaking in one continuous stream, people naturally break their talk into small "chunks" that serve as a basic organizing principle for communication.

In simple terms, you can think of them as the "pacing units" for ideas. They have three main characteristics:

• One Idea at a Time: Each unit usually carries a maximum of one new piece of information, which helps the listener’s brain process what is being said.
• A "Reset" in Sound: When a person starts a new unit, they typically reset their pitch and volume, starting higher or louder and then letting the sound "decay" or fade toward the end of the chunk.
• A Change in Speed: Speakers often follow a "fast-slow" rhythm where they speed up at the beginning of the unit and stretch out the syllables at the very end.

These units appear to be a universal human trait. Across 48 different languages, researchers found that people produce these units at a very steady, low-frequency beat, beginning a new one approximately every 1.6 seconds.

Other Names for Intonation Units

Depending on the field of study or the specific focus of the researcher, these chunks of speech are also referred to as:

• Intonation(al) Phrases
• Prosodic Phrases
• Tone Groups (or Intonation-groups)
• Elementary Discourse Units