The inlet noise of a turbocharged engine is measured. To reduce the noise, a plug-in silencer is designed and its sound elimination effect is calculated and verified by testing. The airflow noise of the engine is regenerated and tested on a transfer loss (TL) bench. The large eddy simulation method is used to calculate the airflow noise of the rear deep-cavity structure and the noise of the plug-in silencer induced by high-speed airflow. A new design concept is proposed in order to reduce the intensity of the airflow noise source.%在整车轮毂上面测量了涡轮增压发动机的进气口噪声。为了降低该噪声，设计了插入式消声器并计算了其消声效果，并在整车轮毂上面验证了该消声器的效果。在包含背景气流的声传递损失台架上面测量并且重现了在发动机上所表现出来的气动噪声。采用大涡模拟的方法计算了具有试验结果的后深腔结构的气动噪声，也模拟了该插入式消声器在高速气流下所产生的噪声，并优化了设计以降低气动噪声源的强度。
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