Cued Speech manual cues, supplementing the Tadoma method, may result in improved speech reception for the deaf-blind.
Reed, Rabinowitz, Durlack, et. al. (1992) "Analytic Study of the Tadoma Method: Improving Performance Through the Use of Supplementary Tactual Displays" Journal of Speech and Hearing Research, Vol. 35, 450-465, April 1992.