Augmentative and Alternative Communication (AAC) refers "to an area of research, clinical, and educational practice. AAC involves attempts to study and when necessary compensate for temporary or permanent impairments, activity limitations, and participation restrictions of individuals with severe disorders of speech-language production and/or comprehension, including spoken and written modes of communication" (ASHA, 2005, p. 1).
Individuals with severe communication disorders and for whom gestural, speech, and/or written communication is temporarily or permanently inadequate to meet all of their communication needs use AAC.
Speech may be replaced or augmented by:
Communication Aids :: Assistive Technology

AAC Intervention.com - Offers augmentative and alternative communication intervention products and presentation services.
Ability Research - Proposes hand held augmentative communication devices.
Aurora Systems - Designs augmentative communication products since 1990.
Meta Description: [ Aurora Suite 2005 from Aurora Systems, Inc. helps people with learning disabilities write and spell better. It also helps people with physical disabilities type faster and communicate easier. Download a free demo. ]
Crestwood Communication Aids - Offers speaking aids, switches, and adaptive toys for children and adults with communication difficulties.
Meta Description: [ Crestwood Communication Aids, Inc. offers light-tech products for children and adults who are unable to communicate because of stroke, neurological disorder, brain dysfunction, hearing/voice/physical difficulties, language barrier, or early intervention. ]
Dexterity Technologies - Offers ergonomic pens, grips and other handwriting aids.
Meta Description: [ EzGrip Ergonomic Pens and Pencil Grips for Writer's Cramp, Arthritis, RSi Help & Prevention and Comfort ]
Digital Acoustics - Manufactures a portable keyboard with text-to-speech synthesizer. The included battery powered speaker talks while you type.
Meta Description: [ Talking AAC keyboard products, Aphasia, keyboards, Speech generating keyboards, Assistive keyboards for ALS and stroke, Augmentative keyboards and aids, ]
DynaVox - Provides advanced augmentative communication solutions.
Meta Description: [ DynaVox Technologies ]
Technologie and Integratie - Proposes hardware and software solutions for people with a communication disability.
The Great Talking Box Company - Manufactures a line of augmentative communication devices for speech impaired individuals.
Toby Churchill - Manufactures portable text-based communication aids for people who cannot speak.
Meta Description: [ Toby Churchill Lightwriter Communication Aids ]
ZYGO Industries - Manufactures and distributes augmentative communication and computer access systems for individuals who are disabled.
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