Evaluation of human bowel motility using non-contact microphones

In recent years, features extracted from bowel sound (BS) has been proposed in the evaluation and monitoring of gastrointestinal motility. BS has been acquired using sensors such as electronic stethoscopes which require body contact with a subject. However, to our knowledge, the analysis of BS using non-contact microphones has not been reported yet. In this study, we compared BS acquired from a non-contact microphone with those of a stethoscope, while subjects undergo the soda tolerance test (STT). The STT stimulates bowel motility. Our investigation shows that irrespective of the body mass index, both stethoscope-based and non-contact microphone-based BSs have a similar performance in computing features such as: BS detected per minute and sound to sound interval in the time domain. These findings provide a powerful new window into the non-contact evaluation of bowel motility.

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