Augmentative and Alternative Communication Device
A dedicated speech-generating or symbol-based device prescribed to individuals with severe expressive communication impairments as a supplement or replacement for natural speech.
Full Definition
An Augmentative and Alternative Communication (AAC) device is a piece of technology—ranging from low-tech symbol boards to high-tech speech-generating devices (SGDs)—that supports or replaces spoken communication. In rehab technology documentation, AAC devices are often discussed in terms of their access method (direct selection, switch scanning, eye gaze), output modality (synthesised speech, digitised speech, text display), and vocabulary organisation system (core–fringe model, activity-specific pages). Editors must distinguish between 'AAC device' (the physical tool) and 'AAC system' (which includes the device, vocabulary, strategies, and support). SGD is a narrower, insurance-relevant term used specifically for funded speech-generating devices.
Usage
Usage note: Spell out fully on first use; 'AAC device' is acceptable thereafter. Do not use 'AAC device' and 'SGD' interchangeably in insurance-related documentation.
In Context
- "The SLP recommended a high-tech augmentative and alternative communication device with eye-gaze access following the client's ALS diagnosis." — AAC evaluation report
- "For Medicare funding purposes, the document must use 'speech-generating device' rather than the broader term 'AAC device'." — Editorial compliance note