An abnormal sound, usually emanating from the heart, that sometimes indicates a diseased condition.

心杂音不正常的声音，通常由心脏发出，有时意味着有。

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Sometimes this creates an abnormal sound that a health care provider may hear through a stethoscope.

有时候，这就造成了一种不正常的声音说，健康护理服务提供者都可以听到通过一个听诊器。

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Therefore, it is necessary to establish an evaluation system of engine abnormal sound that detects engine sound objectively and quantitatively and improves the accuracy.

因此，有必要建立一种发动机异响评价体系，客观定量的检测发动机声音，提高准确率。

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