Audible noise (AN) is a key control parameter in the design of high-altitude AC transmission lines. This paper conducts a statistical analysis of long-term test data obtained from three extra-high voltage (EHV) observation stations on the Tibetan Plateau

which revealed the influence patterns of meteorological parameters on AN during rainy and snowy weather. The results indicate that AN is significantly positively correlated with the rainfall rate and negatively correlated with the visibility on rainy days. In contrast

AN shows a significant correlation with the relative humidity

dew point

and visibility during snowy days. On rainy days

AN increases logarithmically with the rainfall rate

becoming nearly saturated when the rainfall rate exceeds 10 mm/h. During rainy and snowy weather

AN increases with relative humidity and dew point

while intense solar radiation and ultraviolet rays on the plateau region show no significant effect on AN. This paper further finds that a three-month quarterly test can quickly provide L50 values for AN on rainy days

comparable to those obtained from full-year observations

with summer being the most suitable period for testing. Moreover

the correlation coefficient between AN and radio interference during rainy and snowy weather is slightly greater than 0.5

showing linear and synchronous variations under high precipitation. The research findings serve as a valuable reference for the measurement

prediction

and control of AN on high-altitude transmission lines.