A bioacoustic processing apparatus capable of outputting information that represents the current state of attachment of a bioacoustic sensor. The bioacoustic processing apparatus (300), which processes acoustic signals from a bioacoustic sensor (200) attached to a body surface, comprises: a noise-extracting unit (320) for extracting the noise component contained in an acoustic signal from the acoustic signal, and a noise type classification unit (340) for classifying the extracted noise component into one of a plurality of noise types that correspond to different respective states of attachment of the bioacoustic sensor (200) and outputting information that corresponds to the results of said classification.
