Abstract: Method and apparatus for sensing electric fields with a dipole antenna, wherein the antenna generates an antenna signal representative of electric field potential, includes a signal generator for generating mixing signals having known characteristics, variable capacitors for generating first output signals representative of the antenna signal, wherein the capacitance of the variable capacitors is varied by the mixing signals such that the antenna signal is frequency translated. A signal processor processes the first output signals to generate a second output signal representative of the electric field. In a preferred embodiment of the invention, the mixing signals are a quadrature pair of sine waves. In an especially preferred embodiment, the variable capacitors are each a frame, a speaker mounted to the frame. The speaker cones move in response to a signal applied to each speaker.