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Every article on Frontiers is peer reviewed, permanently archived and free to read.

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Original Research
Published 23 June 2026
Classification of infrasonic signals based on time-frequency representation
Hao Yin · Yu Lu · Yunfen Chang · Kai Zhang · Yunhui Wu · Fan Yang · Xuexu Li · Xinliang Pang · Peng Li
Frontiers in Signal Processing
doi 10.3389/frsip.2026.1844194
Original Research
Published 2 February 2026
Research on heart rate estimation algorithm based on dynamic PPG
Jiawei Guo · Shiyuan Chen · Ting Lan · Ruochen Li · Lichao Wang · Yunchong Wu · Jun Zhong · Wei Zhu
Frontiers in Signal Processing
doi 10.3389/frsip.2026.1724468