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Journal of Electrical and Computer Engineering
Volume 2016, Article ID 2404267, 6 pages
Research Article

Fetal Heart Rate Monitoring from Phonocardiograph Signal Using Repetition Frequency of Heart Sounds

1Department of Biomedical Engineering, Dalian University of Technology, Dalian, China
2College of Information and Communication Engineering, Dalian Minzu University, Dalian, China
3Department of Information and Communication Engineering, Yeungnam University, Gyeongsan, Republic of Korea

Received 1 July 2016; Revised 25 November 2016; Accepted 6 December 2016

Academic Editor: Jit S. Mandeep

Copyright © 2016 Hong Tang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


As a passive, harmless, and low-cost diagnosis tool, fetal heart rate (FHR) monitoring based on fetal phonocardiography (fPCG) signal is alternative to ultrasonographic cardiotocography. Previous fPCG-based methods commonly relied on the time difference of detected heart sound bursts. However, the performance is unavoidable to degrade due to missed heart sounds in very low signal-to-noise ratio environments. This paper proposes a FHR monitoring method using repetition frequency of heart sounds. The proposed method can track time-varying heart rate without both heart sound burst identification and denoising. The average accuracy rate comparison to benchmark is 88.3% as the SNR ranges from −4.4 dB to −26.7 dB.