For equipment which does not require attention while in the operating mode, an operator position need not be defined. One or more bystander positions shall be selected and defined in the test plan or equipment specifications. The bystander position shall be 1.00 m away from the projection of the reference parallelepiped on the horizontal plane and 1.50 m above the floor.
If one or more bystander positions are defined, the A-Weighted sound pressure level shall be measured for the operating mode(s) and idle mode defined in Sec.5. Section 7.3.2.1 and Fig. 2 of ANSI S1.13-1971(R1976) may be used as guide to define bystander position around the machine. The measurements shall be carried out in accordance with the procedures of ISO DIS 6081.