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我们在八个健康成年受试者身上测量了从口腔传到覆盖外胸气管的一点和右后胸壁的两点的超过100～600Hz频率范围内的声音幅度。我们用一个声音驱动器和一个刚性管在残余肺容量期间将声音传入受试者的口腔,用轻重量的加速表进行传播测量。我们在所有受试者身上观察到相似的在传播过程中显示出尖峰的加速度频谱特性。这些特性包括:1)在测量频率范围以上有两个传播增加的区域。2)胸壁加速度的幅值在较低频率时比气管部位大约
We measured the amplitude of the sound in the frequency range of 100-600 Hz transmitted from the mouth to one point covering the outer thoracic trachea and two points of the right posterior chest wall on eight healthy adult subjects. We used a sound driver and a rigid tube to deliver sound to the subject’s mouth during the residual lung volume, using a light-weight accelerometer for transmission measurements. We observed similar acceleration spectral characteristics in all subjects that showed spikes during propagation. These features include: 1) There are two areas of increased propagation above the measurement frequency range. 2) The amplitude of chest wall acceleration is lower at the lower frequency than the trachea