Patent ID: 6125189
Filing Date: 2000-09-26
Classification: H04R

Abstract:
An electroacoustic transducer of a digital type, comprising:sounding units of a plurality of groups each including a first conductive diaphragm and at least one electrostatic driving electrode arranged almost in parallel to said first conductive diaphragm;at least one sound receiving unit including a second conductive diaphragm and at least one vibration detecting electrode arranged almost in parallel to said second conductive diaphragm;an electrode driving circuit for electrically connecting or disconnecting between said electrostatic driving electrodes of said sounding units of each group and a power source for driving the electrodes;a level converting circuit for converting a level of a signal derived from said at least one vibration detecting electrode and representing a vibration displacement of said second conductive diaphragm;sampling means for sampling an output signal of said level converting circuit; anda driving signal supplying circuit for supplying an output of said sampling means as an electrode driving signal to said electrode driving circuit in a predetermined format.