www.asha.org/students/speech-language-pathologists/
American Speech-Language-Hearing Association
AAC stands for Augmentative and Alternative Communication. This refers to all the ways an individual communicates besides talking. Children and adults may need other ways to communicate if they have difficulty relying on their speech. Augmentative communication means to add to one’s speech. Alternative communication is used instead of one’s speech. There are many different types of AAC.
There are no tech and low tech options:
gestures/facial expressions
writing/drawing
spelling words by pointing to letters
pointing to pictures or photos
And high tech options:
using a voice output app on an iPad or tablet
Using a speech generating device
https://www.asha.org/public/speech/disorders/aac/
American Speech-Language-Hearing Association