The sound of argon plasma jet was measured in order to clarify its characteristics.
The characteristics of plasma jet sound depends on the arc current, working gas flow rate and its supplying method. The sound intensity W is shown as a function of the jet velocity v (W ∞ υ6). The sound has a very wide band frequency state that means nearly white noise, and has a peak at an angle of 30°-45° for the jet axis on the directivity.
