Pressure amplitude measurement is important for general research on ultrasound. Because it requires high accuracy, it is usually done using a hydrophone calibrated by an accredited laboratory. In this paper, a method is proposed for estimating the pressure amplitude in the ultrasound field using an uncalibrated single-element transducer and Khokhlov-Zabolotskaya-Kuznetsov simulations of the ultrasound field. The accuracy of the method is shown to be better than 20% for slightly focused and nonfocused transducers. Extending the method to a pulse-echo setup enables pressure measurement of a transducer without the need for an extra transducer or hydrophone. (E-mail:

Amplitude estimation, Harmonic distortion, Nonlinear propagation, Wave amplitude,
Ultrasound in Medicine & Biology
Erasmus MC: University Medical Center Rotterdam

Matte, G, Borsboom, J.M.G, van Neer, P.L.M.J, & de Jong, N. (2008). Estimating Acoustic Peak Pressure Generated by Ultrasound Transducers from Harmonic Distortion Level Measurement. Ultrasound in Medicine & Biology, 34(9), 1528–1532. doi:10.1016/j.ultrasmedbio.2008.03.003