نویسندگان
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
The present research was carried out to measure sound levels of John Deere harvesting combine and evaluate the effective factors of combine sound. The Experiments were done based on OSHA standards rules in different levels of engine revolution speed, transmission gear ratio at different distances from operator ear. The sound signals in different conditions were recorded by sound level meter unit and analyzed based on completely random block design in factorial experiment. Results showed that the different levels of transmission ratio had a significant effect on means of sound levels (p
کلیدواژهها [English]
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