Even without the benefit of body language, we have a raft of vocal tools used with words to express our message. Now we all know that the……….. pause……….. is the classic attention seeker (do you notice what I did then?) We might ever so gradually increase the speed and the pitch with which we are speaking to build to an important point… then just before delivering it – pause – then state the point in slow, deliberate, emphatic, low tones. All this to deliberately engage and emotionally connect with your listeners at an intimate level. All the information conveyed without need of visual support.
Some impressions from a first time listener:
http://www.quirkbooks.com/post/audiobooks-trials-and-triumphs-first-time-listener