Studies on the work in using welsh onion peeling machine.(III)Noise characteristic of welsh onion peeling machine.:(III) Noise Characteristic of Welsh Onion Peeling Machine
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概要
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The noise characteristics of a welsh-onion peeling machine and its effect on farmer's health were surveyed.The results are as follows:1) The noise level produced by each machine was over 100dB (A).The noise could be mainly due to nozzle jet, collision between air and solid (welsh-onion) and the peeling flutter.The result of the noise frequency analysis showed the maximum sound pressure level (SPL) at 8, 000Hz band. Such high frequency sound has straight movement, so it could be easily arrested by covering.2) While using the machine during a day, each operator was exposed to about 100dBLeq (equivalent sound level) noise, whereas each assistant to 85-90dBLeq noise.3) The welsh-onion bruises made by using peeling machine could be mainly due to touching the nozzle than the air jet.
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