Piezoelectric Tonpilz Transducer

Application ID: 11478

The tonpilz (sound mushroom) piezoelectric transducer is a transducer for relatively low frequency, high power sound emission. The transducer consists of piezoceramic rings stacked between massive ends and pre-stressed by a central bolt. The tail and head mass lower the resonance frequency of the device.

In this model the frequency response of the transducer when the bolt is not pre-stressed is studied. The Acoustic-Piezoelectric Interaction, Frequency Domain Interface of the Acoustics Module is used for the study. This interface has all the predefined multiphysics couplings necessary to model this system (acoustic-structure and electric-structure).

The model determines the deformation and stresses in the device, the radiated pressure field and sound pressure level, as well as the spatial far-field sensitivity, the transmitting voltage response (TVR) curve of the transducer, and the directivity index (DI) of the sound beam.

This model example illustrates applications of this type that would nominally be built using the following products: