Design of Lung Sound Acquisition and Analysis Device

As a lung examination instrument, lung sound stethoscope has been widely used. However, the results of traditional diagnosis are often affected by stethoscope and doctor's experience. In this paper, a design of lung sound acquisition and analysis device is proposed, which can complete the function of lung sound acquisition and drawing lung sound waveform, provide doctors with intuitive lung sound information, and provide a possibility for the diagnosis of respiratory diseases and quantitative analysis of pathological lung sounds. This device consists of lung sound acquisition terminal, transmission module and Android user terminal. The acquisition terminal can collect the lung sound signal of the patient and transmit it to the Android terminal through the transmission module. Users can perform operations such as audio playback, waveform display, and data storage on the Android terminal. The test results show that the device can realize the acquisition and analysis of 10Hz ～ 3KHz signal, and achieve the expected experimental effect.