48. The apparatus of claim 47, wherein the limb comprises a forearm, and the first and second arrays are mounted in an armband adapted to be worn on the forearm.
48. The apparatus of claim 47, wherein the limb comprises a forearm, and the first and second arrays are mounted in an armband adapted to be worn on the forearm. 49. The apparatus of claim 48, wherein the producing means comprises a speech analyzer mounted in the armband for producing signals representative of speech phonemes and characteristic mouth forms that actually produce such phonemes.