Principles and Techniques of Veterinary and AH Extension

AUDIO-VISUAL AIDS

• Audio Visual aids are devices used to create effective learning situations
• Audio visual aids are classified into audio, visual and audio-visual aids 
• Audio aid is an instructional device in which the message can be heard but not seen.
• Visual aid is an instructional device in which the message can be seen but not heard.
• Audio-visual aid is an instructional device in which the message can be heard as well as seen.
• The audiovisual aids can also be classified into two types:
  • Display type: Posters, Bulletin Boards, Models, Exhibits etc.,
  • Presentation type: Flash cards, Pull charts, strip tease charts, slides and film strips etc., with running commentary.

Role of Audio-visual Aids in Technology Communication

• The ideas or new technologies are transferred or communicated by the extension workers by spoken word or the picture word or a combination of both. They establish direct contact with the farmers in person, in group or through indirect media.
• For better communication of ideas or technologies extension workers have to use the combinations of audio-visual aids as visual and auditory senses together aids a faster learning.