Effect of Applied Frequency

As expected the threshold for aerated water is lower than that for gas free water (see earlier) and the threshold intensity increases ivith increase in frequency. In fact ten 

Most chemists working on sonochemistry in the laboratory will either use some form of ultrasonic bath or a commercial probe system. The latter instruments are often equipped with a pulse facility which was originally designed for biological cell disruption where temperature control is important. This pulse facility enables the power ultrasound to be delivered intermittently and thereby allow periods of cool- 

---