Question

Verbal sounds such as "uh," "er," "um," uh-huh" are often used when one is unsure and are called _____.

Answer 1

It called verbal filter

Step-by-step explanation:

Answer 2

These are called interferences or verbal fillers. This is often used, albeit by unexperienced speakers, by people when speaking in public to fill in a gap or a silence while synthesizing ideas or thoughts. This is more often than not used give the speaker a short pause without creating dead space.