Relations between losses in piezoelectric ceramic and the magnitude of its vibration level

In the paper the method of the mechanical and electrical
loss measurements using a piezoelectric transformer has been applied to
determine the relations between the losses and the magnitude of the vibration
velocity, strain and stress. The measurements and calculations have been
realized for the soft and hard PZT-type ceramics. Good accordance of the
obtained results with the results obtained by the other authors, applying
different measurement methods, proves the usability of the method of loss
measurements proposed by the author.