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Wearable technologies are envisaged to provide critical support to futurehealthcare systems. Hearables - devices worn in the ear - are of particularinterest due to their ability to provide health monitoring in an efficient,reliable and unobtrusive way. Despite the considerable potential of thesedevices, the ECG signal that can be acquired through a hearable device worn ona single ear is still relatively unexplored. Biophysics modelling of ECG volumeconduction was used to establish principles behind the single ear ECG signal,and measurements of cardiac rhythms from 10 subjects were found to be in goodcorrespondence with simulated equivalents. Additionally, the viability of thesingle ear ECG in real-world environments was determined through one hourduration measurements during a simulated driving task on 5 subjects. Resultsdemonstrated that the single ear ECG resembles the Lead I signal, the mostwidely used ECG signal in the identification of heart conditions such asmyocardial infarction and atrial fibrillation, and was robust againstreal-world measurement noise, even after prolonged measurements. This studyconclusively demonstrates that hearables can enable continuous monitoring ofvital signs in an unobtrusive and seamless way, with the potential for reliableidentification and management of heart conditions such as myocardial infarctionand atrial fibrillation.

Hearables: Feasibility of Recording Cardiac Rhythms from Single Ear Locations