FAYE NORMAN / SCIENCE PHOTO LIBRARY FAYE NORMAN / SCIENCE PHOTO LIBRARY
Sign language. Two deaf men using sign language. Each sign, made up of unique hand shapes and movements, is similar to a word. Facial expression and body language also play a part in grammar. Sign language may be used in conjunction with lip reading. The deaf man on the right is wearing a hearing aid, which amplifies sounds electronically. Hearing aids are not suitable for all forms of deafness.
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