Abstract: A microphone structure and method of operation that senses a user's speech as represented by vibrations of the jaw sensed by an electrically passive component mounted on a user's tooth. A permanent magnet is attached to the user's tooth and vibrates as the user's tooth and jaw vibrate in response to the user's speech (or other sounds). A coil senses changes in the magnetic flux in proportion to the vibration of the magnet and thus senses the user's speech. No wired connection is required to sense the vibrations of the tooth/jaw as compared to prior techniques and no electrical power is required within the user's mouth as compared to prior techniques.

Abstract: A data acquisition control method and system for alphanumeric character recognition. An unknown pattern is normalized, the normalized pattern is then divided into top and bottom parts. A center of mass is calculated for the two parts and is utilized for vertically aligning the unknown pattern. The vertically aligned pattern is width normalized and feature vectors are obtained. The feature vectors of the unknown pattern are then compared with feature vectors of known patterns stored in memory and the characters are identified.