In many industries and workshops compressed air has become an indispensable
tool. Compressed air is needed for cleaning, blowing off, drying, conveying and for numerous
other applications. Where uncontrolled compressed air is applied, very often annoying, high-frequency hiss noises arise, which may cause serious harm to hearing.
These »noises« are produced by turbulences generated at the air outlet. Their intensity depends on the shape of the nozzle orifice and on the air pressure.
This means: the better and stronger the air jet is supposed to be, the higher the health-injuring noise level and the higher the air consumption and its cost.