Types of AAC
There are two types of Augmentative and Alternative Communication system, which are aided and unaided AAC.
Aided forms of communication consist of approaches that require some additional external assistance, such as a communication board with visual-graphic symbols, printed words, letters, or icons that "speaks" in order to develop speech skill. This form is appropriate for individuals who low speaking skills.
Unaided forms of communication consist of nonverbal means of natural communication, which involves gestures and facial expressions in order to convey the message. This form is appropriate for individuals who have the ability to use their hands as using sign language.