Assistive Devices for People with Hearing, Voice, Speech, or Language Disorders

This page from the National Institute on Deafness and Other Communication Disorders gives a basic and comprehensive look into assistive technology devices and resources for the deaf and hard-of-hearing. It describes what assistive technology (AT) is, what kinds are available for this type of disability, some specific devices that are available, and what kinds of technological research is underway for these impairments.  https://www.nidcd.nih.gov/health/assistive-devices-people-hearing-voice-speech-or-language-disorders