Enthusiasm is shown through both the visual and auditory aspects of our delivery of speech.
Visual aspects of Delivery include appearance, movement, posture, facial expression, and eye contact.
Appearance is not a presentation variable as much as preparation variable. Speakers it seems are perceived to be more credible when they look professional look.
The way you walk to the front of your audience will express your confidence and enthusiasm. Movement can also help you maintain contact with all members of your audience.
Generally speaking good posture means standing with your spine relatively straight your shoulders relatively squared off and your feet angled t to keep your body from falling over sideways.
The expression on your face can be more meaningful to an audience than the words you say. Your facial expression will reflect your involvement with your message. Don’t try to fake it. Just get involved in your message. And your face will take care of itself.
Eye contact is perhaps the most important non verbal facet of delivery. Eye contact not only increases your direct contact with your audience but also can be used to control your nervousness. Direct eye contact is a form of reality testing.
Auditory Aspects of Delivery
Our para language - the way you use your voice says a good deal about you especially your sincerity and enthusiasm.
Your delivery should be loud enough so that your audience members can hear you. Everything Say but not loud they feel you are speaking to someone in the next room.
Rate: Your speed in speaking is called your rate. There is a range of personal differences in speaking rate. Normal speaking speed however is between 120 and 150 words per minute.
The highness or lowness of your voice pitch is controlled by the frequency at which your vocal folds vibrate as you push air through them. You should control your pitch so that your listeners believe you are talking with them rather than performing in front of them.
Source: Page No 344-345 Public communicationUnderstanding Human communication-Tenth Indian edition, Ronald B Adler& George Rodman, Oxford University press