Sample Academic Introduction Speech.
And there you have an example of a speech introduction broken down three ways. I am not a big fan of humor in speeches. If you use it not expecting to get a laugh and you do, more power to you.
How to write attention grabbing speech introductions
When ever you see an example of a speech introduction that works, study it. Practice your own speech introductions. Test and study them. Study which work and why. Learn why some fail. Make it your goal to master speech introductions.
If your giving a fact based, knowledge rich, objective informational talks, then this is the underlying principle to help turn off the spam filter and capture their attention. This is only one example of informative speech introduction meeting the needs of the audience.