描述了车辆车外主要噪声源的两种常用识别方法即声强法和声压法，给出了小客车车外噪声源的声强法和声压法的对比识别结果。这两种方法对比识别结果表明：在声源愈单一的情况下，声强法与声压法识别结果的相差愈小；在声源愈复杂的情况下，声强法与声压法识别结果相差愈大。 Two commonly used methods for identifying noise sources outside vehicles, namely sound intensity method and sound pressure method, are described. The results of comparison of sound intensity and sound pressure of passenger car noise sources are given. The comparison between the two methods shows that in the case of a single sound source, the difference between the sound intensity method and the sound pressure method is smaller; in the case of complex sound source, the results of the sound intensity method and the sound pressure method The difference is bigger.