You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is All are a type of audio-visual aids except and explain in detail?
Flannel graph: Audiovisual aids: No health education can be effective without audiovisual aids. Auditory aids: radio, cassette tape-recorder, microphone, amplifier, earphone, public address system, disks Visual aids: Not requiring projection: Chalk-bored, leaflets, posters , chas, flannel graphs, exhibits, models, specimens, diagrams, photographs Requiring projection: Slides, filmstrips, overhead projector, epidiascope Combined A-V aids : Televsion, sound films (cinema, synchronized slide-tape combination, multimedia, videotape, drama, skits Ref: Park 25th edition Pgno: 926