An analysis is made for the longitudinal vibrations of a thin, multielectrode, piezoelectric bar composed ofNferroceramic materials. Resonant and antiresonant eigenfrequency equations are derived, and an equivalent electrical circuit of the transducer is developed from the admittance matrix. Numerical solutions are presented for the fundamental resonant frequencies and corresponding normalized frequency differences of a uniformly polarized, two‐electrode, PZT‐4 bar with nonzero interelectrode spacing.