Mobile Buletooth based Electronic Stethoscope for Heart and Lung Sounds

• Main Authors: Chun-Wei Liu, 劉俊緯
• Other Authors: Yu-Chi Wu
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/86905703052830758155

碩士 === 國立聯合大學 === 電機工程學系碩士班 === 102 === During the process of heart and lungs, there are unique physiological heart and lung sounds which are collected clinically for doctors to judge if related diseases are affiliated. Electronic stethoscope with Bluetooth transmission function was built in this study. The device allows the the heart and lung sounds to be converted to electric signals by condenser microphone. The sounds not only can be collected through the amplification and filter circuits but also recorded when connecting the audio cables to computers. Furthermore, the sound data can be submitted to computers with bluetooth transmission or saved in SD card, and can be applied for disease analysis within the man-machine interface. In addition, the filter circuits allows users to alter from heart to lung sound based on their needs. When connecting the audio cables to the computer, the sounds can be recorded and the recorded sounds can also be heard promptly. This function remits greatly the pain of the doctors' from long time use of the traditional stethoscope and improves the disadvantage of not being able to record the heart and lung sounds from the patients. Bluetooth transmission allows users to save data wirelessly. Labview man-machine interface was developed for sound recording and data analysis that is based on empirical mode decomposition and FFT to identify the diseases, avoiding the possibility of the doctor’s misjudge from subjective factors.