What actually is Alternative and Augmentative Communication (AAC)?
Insight

What actually is Alternative and Augmentative Communication (AAC)?

Nicola Blundell
by Nicola Blundell
Published on Oct 03, 2025
0 min read

Helping to demystify what AAC is

Have you ever lost your voice or were in a situation where you couldn’t speak? How did that make you feel? One of the first words people use to describe how they feel in this situation is frustrated! Making yourself heard and communicating a message is vital; communication is a human right!

So what does AAC mean?

Augmentative and Alternative Communication (AAC) refers to different methods of communication other than verbal speech. There can be a variety of reasons why someone may need to use a type, or different types of AAC. AAC encompasses a range of tools and strategies, including communication boards, speech-generating devices, and sign language, designed to support people  to express themselves. It can be either aided (using devices or tools) or unaided (such as gestures or sign language). AAC can help people have a ‘voice’ in all aspects of their daily life and express their needs and thoughts in a meaningful way.

What are different types of AAC?

There are several types of AAC, each designed to support different communication needs. Here are some examples:

Unaided AAC: This doesn't require any external tools, relying solely on the individual’s body to communicate.

  • Sign language: A visual language using hand shapes, facial expressions, and body movements.
  • Gestures: Non-verbal movements or signals to express ideas or emotions.

Aided AAC: This requires external tools or devices to assist in communication.

  • Communication boards: A physical board with pictures, symbols, or words that the person points to.
  • Speech-generating devices (SGDs) & speech apps: Electronic devices that produce speech when the user selects words or symbols on a screen. Some of the most well known people to use a speech generating device are Stephen Hawking and the comedian ‘Lost Voice Guy’

Hybrid AAC: A combination of unaided and aided methods.

The advantage of AAC is it can be made completely bespoke to the individual’s needs and what they want to communicate about.

Why is AAC important?

As stated at the beginning of the blog, imagine not being able to communicate something you wanted to say. Not just to get your needs met but to say how you feel or what you think about something. Without access to effective communication, people may experience frustration, isolation, or a lack of control over their environment. AAC bridges this gap by offering a different way of communicating. Ultimately, AAC enhances self-expression, personal dignity, and social connection, which are essential for overall well-being and development.

The Speech & Language Therapy team at PLP support children in our schools (and the adults around them) to use AAC to enable them to achieve their communication potential.

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