AAC Devices Explained: Choosing the Right Communication Technology

AAC (Augmentative and Alternative Communication) encompasses everything from low-tech picture boards to high-tech speech-generating computers. Choosing the right AAC system depends on the user's motor abilities, cognitive level, communication needs, and environment. This guide breaks down each category.

Low-Tech AAC

Low-tech AAC requires no electronics. Communication boards display symbols, pictures, words, or letters on a physical board. The user points to, looks at, or gestures toward items to communicate. PODD (Pragmatic Organisation Dynamic Display) books organize vocabulary in flip-book format, providing extensive vocabulary without technology.

Low-tech AAC is always available — it never runs out of battery, never breaks, and never needs software updates. Every high-tech AAC user should have a low-tech backup system.

Mid-Tech AAC

Mid-tech devices include simple speech-generating buttons and devices. Single-message buttons like the BIGmack record one message that plays when pressed. Sequential message devices play through a series of pre-recorded messages. These are excellent for beginning communicators, young children, and situations where simple choice-making is the goal.

GoTalk devices offer 4-32 button overlays with pre-recorded messages. Users press a picture to hear the corresponding word or phrase. The overlay can be changed for different situations — one for mealtime, one for school, one for playtime.

High-Tech AAC Devices

High-tech AAC devices are computers dedicated to communication. They run sophisticated software with symbol libraries of thousands of icons, word prediction, sentence building, and natural-sounding text-to-speech voices. Access methods include direct touch, switch scanning, head tracking, and eye gaze.

The Tobii Dynavox line includes devices specifically designed for eye gaze communication — essential for users with ALS, locked-in syndrome, or severe cerebral palsy who cannot use their hands. These devices track where the user looks on screen and select the item they dwell on.

App-Based AAC

AAC apps on consumer tablets have made communication technology more affordable and less stigmatized. Proloquo2Go, TouchChat, LAMP Words for Life, and Predictable are leading apps that provide near-feature-parity with dedicated devices at a fraction of the cost.

The tradeoff is durability and insurance. Dedicated devices are built to withstand drops, drool, and daily abuse. They are classified as durable medical equipment and covered by many insurance plans. An iPad running an AAC app is a consumer device that insurance typically will not cover.

For durability, protect a tablet with a rugged case, screen protector, and mount. Companies like Otterbox and Survivor make cases specifically designed for AAC tablet use.

Choosing the Right System

Work with a speech-language pathologist who specializes in AAC. They evaluate motor skills, cognition, language level, and communication environments to recommend appropriate technology. Most AAC providers offer trial periods — never purchase a system without trying it first.

Consider the user's full day. They need a system that works at home, school, work, in the car, at medical appointments, and in the community. Portability, battery life, outdoor screen visibility, and mounting options all affect real-world usability.

Remember that AAC is a spectrum. Many users combine multiple tools — a high-tech device for detailed communication, a mid-tech button for quick requests, and low-tech boards as backup. The best communication system is the one that gets used.

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