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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 is included as an example in the following products:

Acoustics Module

The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.