An experimental study on the role and function of the diaphragm in modern acoustic stethoscopes
An experimental study on the role and function of the diaphragm in modern acoustic stethoscopes
复制标题
现代声学听诊器中隔膜作用和功能的实验研究
DOI：
10.1121/1.5014157
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发表时间：
2017
影响因子：
3.4
通讯作者：
Lukasz J. Nowak
中科院分区：
文献类型：
--
作者：
Lukasz J. Nowak
Vibrations of a diaphragm of an acoustic stethoscope in contact with the body of an auscultated patient are the source of the sound transmitted to the ears of a physician performing examination. Mechanical properties of a diaphragm are supposed to significantly affect the parameters of the transmitted bioacoustic signals. However, the exact relation remains mostly unclear, as the underlying phenomena involve complex effects of acoustic coupling between the diaphragm and the body of a patient. The present study introduces a detailed methodology for determining vibroacoustic behavior of a diaphragm of a stethoscope during an auscultation examination. A laser Doppler vibrometer is used to measure the velocity of various points on the surface of a diaphragm during heart auscultation. Synchronized recordings of electrocardiography signals are used for segmentation. Representative data sets are selected and analyzed for various kinds of diaphragms. The results show significant differences in vibration velocity ...
