A memorized speech is a speech that is recited from memory rather than read from cue cards or using the assistance of notes. This method of speech delivery does not come as highly recommended as others.
When giving a speech from memory, speakers tend to have a very robotic tone to their voice, making it important to remember to add voice inflection. For more effective memorization, it is recommended to keep the speech relatively short. The recommended form of speech delivery is to use a manuscript or notes for reference. With reference notes, memorization is not required and it becomes easier to add voice inflection.