Audio visual materials

AVM are "materials using sight or sound to present information"         (www.freethesaurus.com)

Audio Visual Resources are those materials which do not depend solely upon reading to convey meaning and present information through the sense of hearing as in audio resources or through a combination of both senses vision and hearing.

Dike (1993)

Materials displayed by visual projection or magnification or through sound reproduction, or both, including graphic materials, audio materials, motion pictures, video materials, and special visual materials such as cartographic and three-dimensional materials.

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