@article{oai:fit.repo.nii.ac.jp:00000495,
 author = {草場, 志帆里 and 李, 知炯 and 甲斐, 智希 and 福本, 悠斗 and 山越, 健弘},
 journal = {福岡工業大学総合研究機構研究所所報},
 month = {Dec},
 note = {application/pdf, 論文(Article), The aim of this study is to compare the heart rate (HR) derived from electrocardiogram (ECG) with the pulse rate (PR) derived from the green light ear photo-plethysmogram (PPG) using an earphone. We developed a compact device that the PPG sensor comprising a green LED and phototransistor was embedded in the earphone. The weight of device was 8.8 g. In 10 subjects,simultaneous measurements of ECG, and green light (525 nm) PPG from the front of tragus were made at the following treadmill speeds: 0, 2, 4, 6, 8 km/h. During walking (2, 4 km/h), the results showed that the PR derived from the green light PPG from the ear significantly related to HR derived from ECG (r = 0.98). In addition, the limit of agreement in Bland-Altman plots between these indices were ± 3.95 (1.96 SD) bpm. In conclusion, these findings suggest that the green light ear PPG using earphone might be practical measurement for monitoring HR during walking., 24345725},
 pages = {97--102},
 title = {スマートイヤーモニターシステムの開発研究－耳部脈拍数検出のためのイヤホン型高感度緑光電容積脈波計測システム開発－},
 volume = {1},
 year = {2018}
}