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利用频域的旋度函数来指导汽车后视镜根部截面形状的低噪声优化改进，取得了降低脉动压力级近１０ ｄＢ左右的效果。
The use of the curl function in the frequency domain to guide the improvement of the low noise of the cross-sectional shape of the rear-view mirror of the automobile and to reduce the pulsating pressure level by about 10 dB is achieved.