Method and system for identifying heart-lung sound signals
A signal recognition and heart-lung sound technology, applied in the field of heart-lung sound signal recognition and system, can solve the problems of no backtracking function, difficult long-term quantitative analysis, and inability to comprehensively analyze auscultation signals, etc., and achieve high portability and small size
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[0043] see figure 1 , The heart-lung sound signal recognition method of the present invention includes a heart sound signal recognition method and a lung sound signal recognition method. Wherein, the heart sound signal recognition method comprises the following steps:
[0044] S11: Obtain the initial heart sound detection signal and the heart sound environment sound signal;
[0045] S12: Perform differential noise reduction processing on the heart sound preliminary detection signal and the heart sound environmental sound signal to obtain a heart sound noise reduction signal after removing the heart sound environmental sound signal;
[0046]S13: sequentially performing amplification, band-pass filtering, notch filtering and voltage bias processing on the heart sound denoising signal to obtain an analog heart sound signal;
[0047] S14: Perform digital-to-analog conversion, filtering, and down-sampling processing on the heart-lung sound analog signal in sequence to obtain a pr...
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