A method of acoustic monitoring includes transducing acoustic energy from a first acoustic transducer attached to a first location on a patient the acoustic energy from the first transducer, comprising desired acoustic energy to be monitored and interfering acoustic energy and transducing acoustic energy from a second acoustic transducer, attached to a second, different location on a patient, the acoustic energy from the second transducer, comprising desired acoustic energy to be monitored and interfering acoustic energy. The method also includes converting the acoustic energy sensed at the first and second locations into first and second electrical signals and processing the first and second electrical signals to digitally remove interfering acoustic energy present in the second signal to provide an electrical signal representative of the acoustic signal that is being monitored.