Many parts of human body generate internal sound during biological processes, which are rich sources of information for understanding health and wellbeing. Despite a long history of development and usage of stethoscopes, there is still a lack of proper tools for recording internal body sound together with complementary sensors for long term monitoring. In this paper, we show our development of a wearable electronic stethoscope, coined Patchkeeper (PK), that can be used for internal body sound recording over long periods of time. Patchkeeper also integrates several state-of-the-art biological sensors, including electrocardiogram (ECG), photoplethysmography (PPG), and inertial measurement unit (IMU) sensors. As a wearable device, Patchkeeper can be placed on various parts of the body to collect sound from particular organs, including heart, lung, stomach, and joints etc. We show in this paper that several vital signals can be recorded simultaneously with high quality. As Patchkeeper can be operated directly by the user, e.g. without involving health care professionals, we believe it could be a useful tool for telemedicine and remote diagnostics.

翻译：人体许多部位在生物过程中会产生内部声音，这些声音是理解健康和福祉的丰富信息来源。尽管听诊器的开发和使用历史悠久，但目前仍缺乏能够记录体内声音并集成互补传感器以实现长期监测的合适工具。本文展示了一款可穿戴电子听诊器的开发成果，命名为贴片守护者（PK），可用于长期记录体内声音。该设备还集成了多种先进生物传感器，包括心电图（ECG）、光电容积脉搏波（PPG）和惯性测量单元（IMU）传感器。作为可穿戴设备，贴片守护者可置于身体不同部位以采集特定器官（如心脏、肺、胃和关节等）的声音。本文证明该设备能够同步高质量记录多种生命体征信号。由于贴片守护者可由用户直接操作（无需医疗专业人员参与），我们相信其将成为远程医疗和远程诊断的有效工具。