An alpha wave inducer is a device used to aid sleep. It is recommended that it only be used sparingly. In 2369, Ty Kajada used an alpha wave inducer to help her sleep. (DS9 episode: "The Passenger") In 2373, Julian Bashir instructed one of his nurses on the USS Defiant to use an alpha wave inducer on one of his patients. (DS9 novel: The Conquered)