Triboelectric Sensor for Use as Microphone or Hydrophone
Patent Application, Filed 12 Aug 98
DEPARTMENT OF THE NAVY WASHINGTON DC
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A triboelectric sensor is used to measure continuous energy changes, such as sound or acoustic energy, by providing a varying charge generated by the triboelectric sensor in response to movement caused by the energy changes. The triboelectric sensor includes a cable, such as a twisted cable pair, having two insulated conductors. A first end of the insulated conductors is coupled to a capacitive element, and a second end of the insulated conductors is coupled to an amplifier. The capacitive element holds the charge generated by the conductors and allows the charge to vary. The amplifier receives and amplifies the varying charge and provides a voltage output that corresponds to the movement of the cable caused by the sound or continuous energy change. The triboelectric sensor is suitable for use as a microphone or hydrophone, such as, for example, in a towed underwater array.
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