[Problem] To make it possible to more accurately distinguish continuous rhonchi from discontinuous rales in lung sounds of humans, etc. [Solution] The biological sound detection signal processing device (90) comprises a robust principal component analysis unit (40), a continuous sound processing unit (20), and a discontinuous sound processing unit (30). The robust principal component analysis unit (40) receives original biological sounds with an input section (12), performs Fourier transforms in a Fourier transform section (14), and performs robust principal component analysis of original sound matrices generated by a matrix-generating section (16). When a sparse matrix obtained from robust principal component analysis is processed with the continuous sound processing unit (20), continuous biological sounds are obtained from the original sounds. When a low rank matrix obtained from robust principal component analysis is processed with the discontinuous sound processing unit (30), biological sounds in which continuous biological sounds have been excluded from the original sounds are obtained.
BIOLOGICAL SOUND SIGNAL PROCESSING DEVICE, BIOLOGICAL SOUND SIGNAL PROCESSING METHOD, AND BIOLOGICAL SOUND SIGNAL PROCESSING PROGRAM