摘要
运用超低频空气耦合式传感器,对运动员运动前安静时和运动后即刻肺音进行检测,并采用国内外通常使用的FFT(Fast-Fourier Transform)频谱分析法,对1 024点加汉宁窗进行分析.结果表明,运动员运动前后肺音变化较大;不同运动项目运动员之间肺音存在着较大差异;安静时运动员肺音的主峰频率和频率范围低于正常人,在总功率的25%和50%处,运动员频谱强于正常成年人.
Athletes are always involved in a state of highly lack of oxygen because of training and competition; in such a circumstances, the requirement on athletes＇ respiratory system is higher than that of normal persons. Therefore, the study on the spectral variation of the athlete＇s lung sound before and after sport can effectively produce the information such as the state of cardiopulmonary function as well as the relationship between the lung sound and the athletic load. The super low frequency air-coupling sensor is applied to measuring the lung sound of the athlete before and after sport. In addition, the commonly used FFT （Fast-Fourier Transform） method is also applied to analyzing the 1 024 dots and Hanning Window. Results： the lung sound variation is great before and after sport; the lung sound between athletes with different events shows great discrepancy. However, the peak frequency and range of athlete＇s lung voice is lower than that of the normal person, and the frequency spectral of athletes is higher than that of the normal adult when the total power is at the state of 25% and 50%.
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第3期62-64,共3页
Journal of Shaanxi Normal University：Natural Science Edition
基金
浙江省体育总局基金资助项目(2002)
关键词
运动
肺音
频域分析
sports
lung sound
frequency analysis
