SAE J 1166:2021-03-22

This SAE Standard sets forth the procedures to be used in measuring sound levels and determining the time weighted sound level at the operator's station(s) of specified off-road self-propelled work machines. This document applies to the following work machines which have operator stations as specified in SAE J1116: - Crawler Loader; - Grader; - Log Skidder; - Wheel Loader; - Crawler Tractor with Dozer; - Pipelayer; - Dumper; - Wheel Tractor with Dozer; - Trencher; - Tractor Scraper; - Backhoe; - Sweeper- Roller/Compactor; - Hydraulic Excavator; - Pad Foot Wheel Compactor with Dozer; - Excavator and Wheel Feller-Buncher. The instrumentation requirements and specific work cycles for these machines are described. The method used to calculate the time weighted average sound level at the operator station(s) is specified for Leq(5), or optional exchange rates, during continuous operation in a work cycle representing continuous medium to heavy work. The work cycles provide a repeatable reproduceable means to uniformly measure working machines against a yard stick. A method to relate the time weighted average sound level at the operator station(s) to estimate operator sound exposure with part load work, supervision, and rest breaks is also provided.