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Reasons to Use Visual Aids. 1  Improves audience understanding and memory. 2  Serves as notes. 3  Provides clearer organization. 4  Facilitates more eye contact and motion by the speaker. 5  Contributes to speaker credibility.
Speaker-dependent systems also have the advantages that they arelanguage independent and can be trained in any language, or using anytype of sound in place of words (for example for people with disabilitieswho can not speak words). Speaker independent systems are trained torespond to words independent of the user.