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● A small frequency (8.1%) of Iranian SLPs were familiar with AAC services; among them, most were familiar with low-tech devices with limited services.
● The majority (92.8%) of Iranian SLPs had clients with communication problems; thus, they needed AAC services.
● Participation in educational workshops and congresses as well as reading texts insignificantly increased the awareness of SLPs about AAC services.

Plain Language Summary 
Numerous adults with nervous system diseases, such as Multiple Sclerosis (MS), Amyotrophic Lateral Sclerosis (ALS), stroke, or Parkinson’s disease, as well as children with developmental disorders, encounter inability to communicate with others within the family or community. Therefore, they cannot express their needs and demands. Augmentative and Alternative Communication (AAC) techniques are used as an effective treatment to help those who cannot use language and speech to communicate. Speech therapists, as members of the AAC service team, should be familiar with AAC devices and techniques as well as the needs of patients receiving these services. The present study examined the familiarity of Iranian speech therapists with AAC services and patients who were candidates for these services. In this study, we surveyed 111 Speech-Language Pathologists (SLPs) using a researcher-made questionnaire. Our results indicated that most speech therapists had clients with communication needs and problems; however, their awareness of AAC methods was insufficient. Most of the SLPs were willing to learn more about AAC, especially high-tech devices. The majority of SLPs participating in this study stated that attending workshops and congresses, and reading texts increased their awareness about AAC services.