分析内燃机表面噪声源的方法很多,但这些方法大多对测量环境和条件要求很高,在普通内燃机实验室内难以进行。本文通过理论分析和试验,提出一种新的简便易行的测量方法,即声导管测量法。 There are many ways to analyze the surface noise sources of internal combustion engines. However, most of these methods have high requirements on the measurement environment and conditions and are difficult to be carried out in common internal combustion engine laboratories. In this paper, through theoretical analysis and experiment, a new simple and easy measuring method is proposed, namely acoustic catheter measurement method.