Fertilizer Machine

By Chong-Rui Huang (黃崇睿)

This research applies active noise control (ANC) with virtual sensing technology to reduce noise of fertilizer spreader. Conventional ANC system created quiet zone around error microphone. For some consumer products, it is necessary to produce quiet zone at human's ear. Therefore, this project uses virtual sensing technology to transfer the quiet zone from the center of the error microphone to human inner ear. Experiments analyze and compare the hybrid ANC system with and without virtual sensing technology. The virtual sensing ANC system has better noise reduction at ear location to reduce fertilizer machine noise 10.3 dBA.