It is sometimes referred to as tactile lipreading, as the listener feels the movement of the lips, the vibrations of the vocal cords, expansion of the cheeks and the warm air produced by nasal phonemes such as 'N' and 'M'.
[3] Hand positioning can vary, and it is a sometimes also used by hard-of-hearing people to supplement their remaining hearing.
However, a small[quantify] number of deafblind people still use the Tadoma method in everyday communication.
[citation needed] The Tadoma method was invented by American teacher Sophie Alcorn and developed at the Perkins School for the Blind in Massachusetts.
It is named after the first two children to whom it was taught: Winthrop "Tad" Chapman and Oma Simpson.