Speech intelligibility in noise using throat and acoustic microphones.

Introduction: Helicopter cockpits are very noisy and this noise must be reduced for effective communication. The standard U.S.

Can augmented force feedback facilitate virtual target acquisition tasks?

This study investigates facilitation of a manual target acquisition task by the application of appropriate force feedback through the control device (e.g., mouse, joystick, trackball).

The form of augmented force-feedback fields and the efficiency and satisfaction in computer-aided pointing tasks.

This study investigates operation efficiency and user satisfaction for spatial and temporal shapes of augmented force-feedback fields to be used with computer pointing devices in target acquisition tasks. In an experiment, three different force-field shapes at two different mean force levels were compared, with an electromechanical force-feedback trackball as control device and with efficiency and user satisfaction as dependent variables. Efficiency was measured by the time required to perform a certain task, and user satisfaction was measured through a subjective rating procedure.