Turbine vibrators maintain 70-75 db's throughout their entire life, as compared to sharp increases in noise levels of ball roller and piston type vibrators. Turbine sound levels actually reduce after a short "break-in" period and retain a constant low sound level throughout their life.Although ball and roller vibrators start at under OSHA limits, they very quickly and steadily increase noise levels to well above OSHA, to beyoun bearable range. (see curve). This is caused by the ball or roller jumping and accelerating each time it passes the air inlet, causing pitting and continuing wear to the ball and races.
