Abstract: An infrasound detector for determining illicit nuclear explosions, comprising an infrasound transducer, signal feedback path, and feedback force transducer. The infrasound transducer is configured to transduce an infrasound signal to an electrical signal. The signal feedback path is arranged to feed a feedback signal from the infrasound transducer to a feedback force transducer. The feedback force transducer is configured to transduce a feedback electrical signal to a feedback force signal and arranged to provide the feedback force signal as input to the infrasound transducer, allowing seismic noise and/or environmental noise to be removed. The infrasound detector also allows for in-situ calibrations.

Abstract: An infrasound detector comprises an infrasound transducer, signal feedback path, and feedback force transducer. The infrasound transducer is configured to transduce an infrasound signal to an electrical signal. The signal feedback path is arranged to feed a feedback signal from the infrasound transducer to a feedback force transducer. The feedback force transducer is configured to transduce a feedback electrical signal to a feedback force signal and arranged to provide the feedback force signal as input to the infrasound transducer.