Question about vocal communication

[sthvw]

Hi,
During the development of humanity, speech communication arose at some point. Many scientific researchers conclude whether or not a certain humanoid group have been able to communicate with each other through speech on the basis of research into the development of the larynx and the vocal cords.
But in my opinion (human) beings can also communicate with each other through whispering. While whispering, people can just talk to each other. The presence or composition of a larynx or vocal cords does not play any role in this.
How does science stand in this ???

[Phi for All]

Difficult to see how whispering would become a dominant form of communication among a social species.