Noise Reduction in a Low-Drift Orchard Sprayer for Trellis-Trained Crops

Abstract

The developed low-drift orchard sprayer for trellis-trained crops has the same spraying performance as conventional sprayers, even when the machine reduces engine speed and air volume. It is thought that the noise level of the low-drift orchard sprayer can be reduced. Therefore, we evaluated the effects of noise reduction.

The noise level of the new sprayer at the operator’s ear was 82 dB (A), which was lower than that of conventional sprayers. The area where the noise level was above 85 dB (A) was 53 to 211 m² with conventional sprayers, whereas it was 0 m² with the new sprayer. Thus, the area with a high noise level was small.