PCG signals for biometric authentication systems: An in-depth review

This review aims to present a survey of the technologies and methodologies used in phonocardiogram (PCG) biometric systems. The phases PCG which are explored this paper include data acquisition, de-noising, extracting peaks, feature extraction, reduction, classification, evaluation. As part study, we performed systematic that summarizes well-known approaches since its inception current status. Out 157 manuscripts available academic databases from 2006 until 2020, 35 primary studies focused on ”heart sounds” like is related objective research. those studies, 11 matched inclusion criteria. estimation performance these systems close an acceptable level consideration as biometric. use signals promising field. Finally, limitations some future works discussed.