At Better Hearing Australia’s annual lip reading competition, most people score only 40-50%. The few who hit 90% and higher do so through context, context, and guess work.
Tugging at the lips (small grimaces or smiles) often indicate worry, fear, or anxiety. Raised eye brows also tend to indicate anxiety or stress. Furrowed brows and foreheads indicate displeasure or anger. Creases around the edges of the eyes indicate happiness and excitement. Cocking the head to the side usually indicates discomfort or even slight hostility. Looking down shows nervousness, shyness, or an unwillingness to communicate. [3] X Research source
[b] & [p] [k] & [g], [t] & [d], [f], [v], & [th] [s] & [zzzz] [m] & [n][6] X Research source Benguerel AP, Pichora-Fuller MK. 1982 Coarticulation effects in lipreading. J. Speech Hear Res. 1982 Dec;25(4):600-7. PMID 7162162