Ultrasound in Air

This Special Issue covers the growing area of ultrasound in air, where innovations in powerful sources and digital signal processing have produced a wealth of proposed devices and applications. However, for maximum benefit, we must be able to conduct standardized field and source measurements with appropriate processes, calibrations, and set exposure limits based on knowledge of the potential for adverse effects on humans. These are difficult areas in which the research base is scarce. This issue includes papers on new devices and applications, the difficulties with measurements and calibrations, and discoveries on the potential for adverse effects.

Guest Editor: Timothy G. Leighton