Explain the four key characteristics that contribute to the quality of a speaker’s voice?

1- Your slides

2- Your Body Language

3- Your Selection of words

4- Clear Ideas and Confidence

1.Clarity

2.Loud

3.Not pinching

4.Low speed

for my opion those four characteristics can be considered to come up way out of barrier of effective communication in general for example tone of speech, distance from audiances, media including physcial barriers, language used and how to say, and finally prejudment for example if the person is feeling fear the quality of this voice would change.