The best motivational speakers can inspire and get people excited using any form of communication. Many people buy CDs of motivational speakers to listen to in the car. It doesn't matter that they can't see them; the enthusiasm is transferred by voice. The message is delivered without the benefit of smiles or twinkling eyes. Sight and sound is the whole package, of course, but it is the sound that really carries the motivational message. If you were to watch a motivational speaker with the sound off, you might get a little inspired, but what you really need is to be able to hear that person.
If you are a motivational speaker, consider trying to reach new audiences using a conference call. It is better than a CD because there is a higher level of personal interaction. With a pre-recorded product, listeners get packaged information, but they can't ask any questions. More importantly, there is a huge difference in personal connections between recorded and live.
A conference call is a great way to get like-minded people together who want to grow or improve in some way. In setting up that conference call, you will give your audience the opportunity to interact with you and maybe even dialogue a little with each other. When it comes to motivation, nothing works like a chorus of encouragement.