Method and apparatus for noise reduction of electromyogram signals

摘要

A system and a method are provided for reducing noise in Electromyogram (EMG) signals from an external abdominal surface to detect uterine contractions. The system comprises an EMG1 sensor configured to detect a first EMG signal and to generate a corresponding EMG1 input signal and an EMG2 sensor configured to detect a second EMG signal and to generate a corresponding EMG2 input signal. A signal processor is coupled to the EMG1 sensor and the EMG2 sensor. The signal processor processes the EMG1 input signal and the EMG2 input signal with a filter and sum technique to generate an EMG1 reduced noise signal that represents a magnitude of at least one contraction event and periodicity of a set of multiple contraction events.