Cardiechema and respiratory murmur are important indexes which reflect physiology and pathology of heart and lung. Nowadays acouophonia of the cardiechema and respiratory murmur is still the main diagnosis method. 心音和呼吸音是反映心脏和肺部生理及病理的一项重要指标,目前对心音和呼吸音的听诊仍然是心脑血管和呼吸系统疾病的主要诊断手段。