abstract

• Phonocardiography is routinely used in clinical practice as a tool for detecting heart diseases by listening and analyzing heart sounds (HS). Several electronic phonocardiograph (PCG) devices are commercially available, sometimes including a companion software for personal computers or smartphones. In this study, the design, implementation, and pilot testing of a smartphone-based digital and affordable PCG is addressed. The proposed system incorporates an electret microphone, analog signal conditioning, analog-to-digital conversion, and Bluetooth wireless transmission to a custom designed mobile application (app) for Android devices. The case and acoustic bell was designed in 3D, satisfying the dimensions of the air cavity stipulated in the literature. The app oversaw the real-time recording, digital signal processing and displaying of the PCG signals. The results of a series of pilot tests performed to the PCG, including tests with Gaussian white noise, pure tones, and simulated heart sounds, are presented, together with an example of a PCG signal recorded at the mitral auscultation focus of a healthy volunteer. The preliminary results pointed out to the feasibility of implementing the low-cost, custom designed, smartphone-based PCG system, but more exhaustive tests and real data acquisitions are required.

authors

• Reyes Bersain Alexander

publication date

• 2022-01-01

published in

• XLV Mexican Conference on Biomedical Engineering. CNIB 2022. IFMBE Proceedings  Proceedings

keywords

• Heart sounds PCG Mobile health Smartphone

Digital Object Identifier (DOI)

• 10.1007/978-3-031-18256-3_55

PubMed ID

start page

• 518

end page

• 529

volume

• 86

issue