Abstract: As a component widely used in various industries， the noise problem of fans has always attracted people’s attention. In equipment with relatively low noise energy levels， abnormal noise， such as whistling， or rattlesing， from fans are key factors that lead to user complaints. Taking laptop fans with various abnormal noises as an example， the correlation between the severity of fan abnormal noise and the main psychoacoustic parameters of sound quality was studied， and a linear regression model between the subjective score of abnormal noise and the objective parameters was established. The results show that loudness， sharpness， prominence ratio， and the frequency corresponding to the maximum value of pitch affect the subjective feeling of abnormal noise. The multivariate linear model including loudness and sharpness can better evaluate the subjective score of the severity of abnormal sound.