The Principles of Hearable Photoplethysmography Analysis and Applications in Physiological Monitorin

The present integrative review explores the existing literature on an in-ear PPG signal and its application. This review aims to identify the current technology and usage of in-ear PPG and existing evidence on in-ear PPG in physiological monitoring. This review also analyzes in-ear (PPG) measurement configuration and principle, waveform characteristics, processing technology, and feature extraction characteristics.

Sensors | Free Full-Text | The Principles of Hearable Photoplethysmography Analysis and Applications in Physiological Monitoring–A Review (mdpi.com)