Within our community lives a second culture that very few are familiar with, and that is the community of the Deaf. Because our society relies primarily on hearing to navigate, the world can become a difficult place to live. To compensate, those who are hard of hearing use their own language – American Sign Language (ASL) – that is purely visual and has its own unique sentence structure apart from English.
This patch program has been designed to educate participants on the language itself, but also on the culture and community that comes along with being Deaf or hard of hearing.

https://www.girlscoutsccc.org/en/discover/activities/council-own-patches.html