Title: Sound Attenuation in Operator Enclosures
text: This paper outlines parameters for the design of operator's enclosures (cabs), with special reference to noise control. Specific suggestions for the solution of noise pollution include shock mounting of the cab, plugging all holes through which noise can enter, attenuating large sheet metal areas by damping, effectively using large amounts of glass, diverting the exhaust outlet away from the cab, providing a fan shroud, not mounting sound generating components to enclosure walls. Such steps should reduce the sound level by 15-20 dB, but will add 12-15% to the overall cost of the enclosure.