运动前后脉搏声和肺音信号的同步拾取与特征研究

Synchronous recording and characteristic study of the pulse-sound and lungsound signals before and after exercises

目的:人们对脉搏声和肺音的研究已取得了可喜的研究成果,但对运动员这样一个特殊群体的研究未见报道。方法:运用无创声学检测方法,在现场对运动前后的脉搏声和肺音进行同步拾取,对所测得数据加汉宁窗进行功率谱分析。结果:安静时脉搏声和肺音的主峰频率和频率范围与身高、体重之间并不相关,但与运动成绩却有一定的关联。同样的脉跳次数,其脉搏声的主峰频率和频率范围是不一样的;运动后的脉搏声的频率范围向低频和高频两端延伸,而肺音的频率范围则向高频端偏移,主峰频率降低。不同运动项目之间存在着较大差异。因此,我们认为在运动训练中用声谱信号检测具有无创、快速、准确的特点,可作为监测和评价运动员心肺功能的方法之一。

Objective： great achievements have been made in the pulse- sound and lung- sound researches, however, such study carried on the objectives of athletes was seldom reported. Methods： By applying the non- invasive acoustic examination, this paper takes synchronous recording of pulse sound and lung- sound signals before and after exercises, and further makes a power spectrum analysis on the Hanning window. Results： before exercises, the primary peak frequency of pulse- sound and lung- sound has little relation with the stature and weight of the objective, but relating to its athletic performance. For the same pulse times, their pulse- sound primary frequency and frequency range are different. After exercises, the lung- sound frequency range extends to the both low- frequency and high- frequency sides, however, the pulse- sound frequency range only extends to the high frequency end, with decreased primary frequency. The results from different sport events diversity a lot. Therefore, we characterize the acoustic examination as a non- invasive, rapid and accurate method, which can be developed as one of the most important ways to monitor and evaluate the athletes＇ cardio- pulmonary functions.