Tadoma is a method of communication that is used by the deafblind people. They feel the jawline and the lips of a person they are communicating with to feel the vibration of what they are saying. This has been found to be an effective way to communicate with others for people that are deafblind. From my personal experience, I have known that there were people that were blind or deaf and there were ways to communicate to them in some way. I had no idea that this was a thing where a person would put one hand on a jawline and another on their lips to feel what a person is saying. This is truly a fascinating way of communication and the fact that it is proven to be effective is amazing to see.