Because of the uncertainty of the position and pronunciation angle, auscultation sound of TCM collection methods can not get accurate sound amplitude, so an auscultation sound acquisition and improvement method is presented, by adding a specific frequency with fixed sound intensity reference sound as the normalized standard. This method uses the principle of calibration of sound intensity in patients with voice owned by one oriented to the same location of the sound signal amplitude value, thereby eliminating the uncertainty brought from the sound acquisition and pronunciation angle. The device is simple to achieve and the operation is also simple, error is less than 6% after normalizing and the method has been used in research work.%传统中医闻诊声音采集方法,由于位置和发音角度的不确定,无法获取精确的声音幅度.提出一种闻诊声音采集改进方法,通过加入一个频率固定、声强固定的参考音,利用声强校准原理,将人的语音归一化到同一位置的声音幅度值,从而消除因距离和发音角度变化带来的信号不确定性.该方法简单易行,归一化后误差小于6％,已应用于临床科研工作.
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