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58汽车噪音购车参考指数15在说汽车噪音之前,先说下什么是噪音。并不是所有声音都是噪音,比如音乐。噪音的定义在专业上是这样的:各种不同频率和不同声强的纯声无规律地杂乱组合
58 car noise car reference index 15 before talking about car noise, say what is noise. Not all sounds are noise, such as music. The definition of noise in the professional is like this: a variety of different frequencies and different sound intensity of irregular random clutter