One of the characteristics of the oral communication system is that it is

One characteristic of the oral communication system is that it is point to point, passing directly from one speaker to another.

Speech flows immediately between people who are present to each other.

Being mediated is wrong, for oral communication is direct and needs no intervening technology.

Being impersonal is wrong, since face to face speech is highly personal and responsive.

Being noise laden is not its defining trait, as clear direct speech can carry meaning cleanly.

Its direct, person to person reach is the hallmark of the oral system.