@article{มาตรมูล_คล้ายใจตรง_พันไพศาล_2018, place={Phitsanulok, Thailand}, title={PHONOCARDIOGRAM MONITOR VIA BLUETOOTH WIRELESS NETWORK}, volume={3}, url={https://ph01.tci-thaijo.org/index.php/Scipsru/article/view/133455}, abstractNote={<p>This research designs and constructs phonocardiogrammetric device with bluetooth connectivity. A modified stethoscopes with miniaturized condenser microphone is used as     a tool for retrieving cardio phonogram data. The analog sound is then amplified with non-inverting amplifier with the gain of 47:1 and low-pass filter with 1 kHz cut-off frequency. An analog cardiophonogram data is then converted to digital by arduino nano reduce instruction set computing. Finally, the bluetooth module HC-05 is used to transfer digital cardiophonogram to an application installed on the target mobile device. A cardiophonogrammetric display application uses Basic4Android as a tool to achieve graphical plot of digital data transferred from HC-05 module. It was found that the digital data transferred from phonocardiogrammetric device to the mobile phone is wireless, clear and correct.</p>}, number={2}, journal={PSRU Journal of Science and Technology}, author={มาตรมูล ไกรลาส and คล้ายใจตรง อภิญญา and พันไพศาล วสุ}, year={2018}, month={Aug.}, pages={13–25} }