דיבור נאום הרצאה

[TalomedIvrit]

What is the difference between the 3 words in the subject line? Which would be used to describe the quality of vocalization (e.g., a stutter, an accent, too loud, too soft)? Which would be used when someone stands up in front of an audience and gives a 10-minute talk (or speech)? How about a lecture?

 

[slus]

It's exactly as you said:

To describe the quality of vocalization - דיבור
דיבור is also used for the things you do in a regular conversation and also as a slang word for rumour.

When someone stands up in front of an audience and gives a 10-minute talk (or speech) you use נאום.
Lecture is הרצאה.

 

[LXNDR]

And the quality of ponunciation or articulation is חיתוך דיבור