Abstract: Driven by the "dual carbon" goals, the global wind energy market has maintained steady growth. Wind turbines are developing toward higher power output and larger impeller diameters, which has made the noise issue increasingly prominent. As the country imposes stricter requirements on the ecological civilization construction, there is an urgent need for wind turbine noise control. Wind turbine noise sources are mainly categorized into three types: Aerodynamic noise, mechanical noise, and auxiliary equipment noise. In terms of spectral distribution, they can be further divided into low-frequency noise and high-frequency noise. Low-frequency noise features strong penetration, while high-frequency noise is easily absorbed. For the existing wind farms studied in this research, measures such as installing serrated trailing edges on blades, unclogging drainage holes, and conducting sound absorption modifications inside nacelles were adopted. These measures aim to reduce noise decibels, improve noise frequency characteristics, and enhance human comfort.