Quantitative Evaluation of Harmonic Generation at Contacting Interface

Quantitative evaluation of second harmonic generation is presented for a contacting interface of polished aluminum blocks insonified by a 1‐MHz longitudinal toneburst wave. The frequency characteristics of the receiving piezoelectric transducer are corrected in comparison to a laser‐Doppler vibrometer. The dependence of the relative second harmonic amplitude in the transmitted wave on the applied pressure and the incident wave amplitude is discussed.