Abstract: With the popularity of household air conditioners, their operating noise has increasingly attracted consumers’ attention. The noise from household air conditioners poses certain hazards to human health, quality of life, and the social environment, including sleep disturbance, hearing damage, psychological effects, and neighborhood disputes. At present, the main air conditioning noise reduction technologies are researched from four aspects: mechanical vibration control, aerodynamic noise optimization, structural improvement, and intelligent control. Research indicates that the future development of air conditioning noise reduction technology will be towards lightweight materials, intelligent adaptive control, and multi-physical field collaborative optimization, aiming to achieve lower noise emissions and higher energy efficiency. Provides theoretical basis and practical guidance for low-noise design of air conditioning products and rational use by users

Key words: Household air conditioning, Noise hazards, Mental health, Sleep quality, Noise reduction technology, Vibration control, Aerodynamic noise