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 Various classifications are given for Audio visual aids according to the type of projection by various authors.
I)             Classification of A.V.Aids
I)                    Audio aids
Audio materials are those which can be heard. Ex: - radio, tape recorder, walkman, Headphones.
II)                  Visual aids: these are helpful to visualize the things. Ex:- graphic aids, 3d-aids, display boards, and print material.
III)                Audio visual aids: these aids can be heard and seen simultaneously. Ex: - projected aids, TV, films.
II)   Classification of A.V.Aids
I)                    Simple A.V.Aids: It includes graphic aids, display boards, 3d-aids, print material...etc.
II)                  Sophisticated A.V.Aids: includes audio-visual aids.

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