现在让我检查你有没有异常的胸音。

Now let me check if you have any abnormal breath sounds.

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在肺胸系统正常和机能异常情况下对肺泡呼吸音、哮鸣音、喘鸣音和破裂音进行了分析。

Vesicular breath sounds, wheezes, stridors and crackles in the normal lung-thorax system mechanism and abnormal lung-thorax system mechanism were analyzed.

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实验结果表明：正常肺音音源为白噪声，异常肺音音源为周期脉冲序列，肺胸系统相当于声低通滤波器。

The results of experiment show that dreath sound sources are random white noise, Abnormal breath sounds sources are sequence of periodic impulses.

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