Abstract: The popularity of range hood in the domestic market is getting higher and higher, and customers' standards for the selection and purchase of range hood are also gradually improved. The pursuit of product quality is not limited to high suction, more and more users pay more attention to the sound quality experience of range hood. The sound quality optimization of range hood has become a new track to improve the competitiveness of products. Analyzed a range hood with typical "abnormal noise" problem, and the "abnormal noise" hearing is quantified by the psychoacoustic parameter "noise adjustment ratio". The structure of the machine is optimized by sound radiation test, structural modal test and structural modal simulation, and the abnormal noise is eliminated successfully.

Key words: Range hood, Sound quality, Resonance, Abnormal noise