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: Apparatus and method for forecasting the quality of radio communication links on a short-term basis are disclosed, the apparatus including at least one, and preferably an ensemble of, sensors providing output indicia indicative of evolving atmospheric and/or ionospheric conditions in the vicinity of a monitored communication link. The sensors may include any device that provides data containing predictive information, such as a microwave radiometer for receiving atmospheric emissions that are related to atmospheric scattering and absorption of radio propagation, input for measurement of the signal-to-noise ratio of the radio link carrier, and sensors of surface meteorology including barometric pressure, temperature, and surface winds direction and velocity. Data provided is processed utilizing mathematical inversion (also referred to as function estimation) techniques to provide predictions of changing link quality in the short-term (e.g.