| dc.description.abstract | Chronic Obstructive Pulmonary Disease is an obstructive lung disease characterized by persistent airflow limitation. Its main symptoms are shortness of breath, cough and expectoration. Pneumonia refers to the symptoms of inflammation in the lungs, mainly the alveoli are affected. Common symptoms of pneumonia include cough, chest pain, and difficulty breathing. The way to reduce the morbidity and mortality of these diseases is to detect the pathological changes of early symptoms, such as abnormal breath sounds produced by these diseases, abnormal breath sounds include crackle, wheeze, bronchial breath sound and stridor are important clinical biomarkers for early diagnosis and monitoring of lung diseases. This study provides a wearable device, which is composed of multiple high-precision accelerometers, using multiple sensors placed on the body to conduct longitudinal assessment of lung sounds. Studying the properties of vibration waves by taking measurements at each location will help to understand the distribution of vibrations in the chest during breathing. Through the high-precision synchronization rate, linear frequency response and high signal quality of the accelerometer, the signal synchronization and vibration problems in multiple positions can be solved. Utilize the high sensitivity of these accelerometers to detect high-frequency vibrations due to potential lung lesions, compared to traditional stethoscopes that conduct vibrations through air, this method can isolate the interference of external noise and simultaneously acquire multiple positions signal. Multichannel system will allow the detection of abnormal breath sounds in chronic obstructive pulmonary disease and other lung diseases. In the future, it can be used to measure the breath sounds of actual patients in order to achieve the purpose of early diagnosis and identification of diseases. | en_US |