Methods: withdraw the envelope of heat sounds by using Mathematic Morphology and normalized Shannon energy, extract first heart sound and the second heart sound.
利用数学形态学和归一化香农能量两种方法分别提取了心音的包络，突出了第一心音、第二心音等特征。
Results: Their main cause to colour Doppler echocardiography were murmur, cyanosis, panting, asphyxia, feeding-difficulty, Loud pulmonary valve second heart sound.
结果：进行心脏彩超检查的原因以心脏杂音、紫绀、宫内窘迫或新生儿窒息、呼吸急促、肺动脉瓣第二心音亢进最常见。
The clinical experiments have indicated that the first and second heart sound can be almost acquired by the microphone, but it is difficult for the third and fourth, w…
临床实验表明，利用驻极体传声器基本上能采集到正常的第一、第二心音，但对有病理信息的第三、第四心音却不易正确采集到，这与患者性别和胖、瘦等因素均有关系。
This sound is so miraculous that it can take your pain from your heart, even if it is only for a second.
这声音是如此神奇，它可以携带您的疼痛从你的心，即使是只有一秒钟。
This sound is so miraculous that it can take your pain from your heart, even if it is only for a second.
这声音是如此神奇，它可以携带您的疼痛从你的心，即使是只有一秒钟。
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