The Design of a New Digital Collecting System of Heart Sound Signals Based on XH-6 Sensor

Human heart sound signals has the characteristics of strong noise, slight signal, strong randomness and vulnerability to outside interference. Accordingly we design a heart sound detection system based on the new XH-6 sensor to collect the slight heart sound signals, to display in real-time and to save the phonocardiogram. Measurement on different individuals shows that this detection system meets the requirements of human heart sound signals detection. Using this system we are able to differentiate clearly various components of heart sound through the phonocardiogram.