Guitar having a polyphonic pickup for sensing string vibrations in two mutually perpendicular planes

摘要

A transducer (10) for detecting vibrations in an object (12). Multiple pickup coils (28, 29) are utilized which are sensitive to both the vibrations in the string plane and the vibrations perpendicular to the string plane. This system subtracts the signals from the first and second pickups to create a signal representing the vibrations in the string plane and combines the signals from the first pickup and the second pickup for determining the string vibrations perpendicular to the string plane.