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Development of a Low-Cost Wireless Phonocardiograph With a Bluetooth Headset under Resource-Limited Conditions

机译：资源受限条件下带有蓝牙耳机的低成本无线心电图仪的开发

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Commercially available digital stethoscopes can be used as a phonocardiograph to record heart sounds. However, procuring a costly digital stethoscope may not be possible under resource-limited conditions. A low-cost, wire connected, and mobile phone-assisted phonocardiograph has been reported previously. The aim of this study was to develop a low-cost and wireless phonocardiograph for resource-limited settings. A Bluetooth headset was dismantled to find its microphone. A stethoscope ear knob was cut to make a small bell and it was attached to the microphone. This modified Bluetooth headset was capable of recording sounds while connected to a mobile device with audio recording application. The modified Bluetooth headset, mobile phone, and audio recording software can serve as a wireless phonocardiograph (WiPCGh). Heart sounds were successfully recorded with the help of the newly developed WiPCGh. The audio files were shared with a personal computer (PC) via Bluetooth. The wave form was analyzed in a PC-based audio editing application. First and second heart sounds with systolic and diastolic murmur were identified. WiPCGh can be utilized in recording heart sounds for academic and telemedicine purposes. However, the capability of WiPCGh in the diagnosis of cardiac diseases is yet to be explored in future studies.
机译：市售的数字听诊器可用作心音记录器，以记录心音。但是，在资源有限的情况下，可能无法购买昂贵的数字听诊器。以前已经报道了一种低成本的，有线连接的，手机辅助的心电图仪。这项研究的目的是为资源有限的环境开发一种低成本的无线心音图仪。拆除了蓝牙耳机以找到其麦克风。听诊器听诊器的旋钮被切成小铃铛，并固定在麦克风上。这款经过修改的蓝牙耳机能够在通过音频记录应用程序连接到移动设备时记录声音。修改后的蓝牙耳机，移动电话和音频记录软件可以用作无线心电图仪（WiPCGh）。在新开发的WiPCGh的帮助下，成功录制了心音。音频文件通过蓝牙与个人计算机（PC）共享。在基于PC的音频编辑应用程序中分析了波形。识别出具有收缩期和舒张期杂音的第一和第二心音。 WiPCGh可用于为学术和远程医疗目的记录心音。但是，WiPCGh在心脏病诊断中的能力尚待进一步研究。

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