Ultrasound is an acoustic vibration frequency that is too high to be audible. An ultrasound corresponds to a frequency above 20,000 Hz.
The human ear can perceive sound waves with frequencies between 20 Hz and 20,000 Hz.
Many phenomena generate ultrasound, such as leaks in compressed air or pressurised gas.
For example, faulty bearings and lubrication, turbulence in the fluid or gas circuits.
Moreover, aeration and cavitation in pumps, electrical partial discharge and corona effects and many other phenomena also generate ultrasound.
Therefore, in predictive maintenance, the ability to detect ultrasound resulting from malfunctions in an industrial environment can anticipate failures and accidents and save energy.