A piezoelectric transducer defined by two faces comprises a plurality of piezoelectric cylinders. The axial length and composition of the piezoelectric cylinders determines the frequency of the transducer when excited. The axial ends of the piezoelectric cylinders are aligned with the faces. The piezoelectric cylinders are separated from each other and the space therebetween is fully or partially empty such that crosstalk between piezoelectric cylinders is substantially eliminated. Electrodes are produced at the faces of the transducer for simultaneously exciting the piezoelectric cylinders.