Patent ID: 7479113

Claim:
A device for automatically detecting heart valve damage, comprising: at least one heart tone microphones for recording heart tones; a signal processing system, connected with said at least one heart tone microphone, used for digital processing said heart tones recorded by said at least one heart tone microphone, and for operation and comparison of system transfer functions, wherein said signal processing system comprises: a reference database for storing relationship data between accumulated clinical heart valve damage and accumulated heart tones; a heart tones separating unit, connected with said at least one heart tone microphone, configured to separate said heart tones into four heart tone signals of the aortic valve, the pulmonary valve, the tricuspid valve and the mitral valve of the heart based on timing characteristics and related techniques; a heart tone signal digital processing unit, connected with said heart tones separating unit, configured to process the separated heart tone signals into sampling signals; a convolution unit, connected with said heart tone signal digital processing unit, configured to process said sampling signals for producing the system transfer functions through a convolution method; and a comparison unit, connected with said convolution unit and said reference database, configured to compare separately said system transfer functions of the four heart tone signals to detect heart valve damage to four heart valves; and a display connected with said signal processing system and used to display heart valve damage.