九州大学大学院生物資源環境科学府環境農学専攻生産環境科学講座生産システム設計学研究室
Laboratory of Bioproduction Engineering, Division of Bioproduction Environmental Sciences, Department of Environmental Agriculture, Faculty of Agriculture, Kyushu University
九州大学大学院生物資源環境科学府環境農学専攻生産環境科学講座生産システム設計学研究室
Laboratory of Bioproduction Engineering, Division of Bioproduction Environmental Sciences, Department of Environmental Agriculture, Faculty of Agriculture, Kyushu University
九州大学大学院農学研究院環境農学部門生産環境科学講座生産システム設計学研究室
Laboratory of Bioproduction Engineering, Division of Bioproduction Environmental Sciences, Department of Environmental Agriculture, Faculty of Agriculture, Kyushu University
九州大学大学院農学研究院環境農学部門生産環境科学講座生産システム設計学研究室
Laboratory of Bioproduction Engineering, Division of Bioproduction Environmental Sciences, Department of Environmental Agriculture, Faculty of Agriculture, Kyushu University
九州大学大学院農学研究院環境農学部門生産環境科学講座生産システム設計学研究室
Laboratory of Bioproduction Engineering, Division of Bioproduction Environmental Sciences, Department of Environmental Agriculture, Faculty of Agriculture, Kyushu University
九州大学大学院農学研究院環境農学部門生産環境科学講座生産システム設計学研究室
Laboratory of Bioproduction Engineering, Division of Bioproduction Environmental Sciences, Department of Environmental Agriculture, Faculty of Agriculture, Kyushu University
Uncomfortable noises occurred by agricultural machinery cause operator's fatigue. These noises are generally reduced to some extent by the cabin. However this approach is known as not effective method at low frequency noise. In this research, the characteristics of noise level inside and outside the cabin of an agricultural riding tractor are verified by recording and analyzing the frequency and acoustic power of noises. Noise reducing experiment are carried out using ANC system. As a result, the highest sound pressure level reached to 90dB at the around operator's head. Main noises were generated from the engine part and the low-frequency noises were not almost reduced by the current type of the cabin. The noise are reduced about 3dB from 70 to 300 Hz and reduced about 9dB at the maximum.
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