A method and system for controlling bias voltage for use with an
electrostatic transducer are provided. The bias voltage is dynamically
varied or set as a function of imaging mode, depth gain compensation,
elevational apodization, azimuthal apodization, timing with respect to the
transmit waveform, center frequency of transmit and receive waves and
desired modulation. Opposite polarity on sub-elements is also provided for
removing signals from electromagnetic interference and crosstalk between
elements.
