 Stethoscopes have been around since the late 1800s, but they have evolved significantly over time. They were initially designed for the auscultation of a patient's chest for the purpose of listening to lung and heart sounds. Today, these devices are used by medical professionals to listen to a variety of sounds within the body, including those from the gastrointestinal tract and vascular system. In addition, stethoscopes are increasingly being used for telemedicine due to the COVID-19 pandemic. Digital stethoscopes have become popular in recent years, offering many advantages over traditional models. This paper reviews the current state of the art in stethoscopes, with particular emphasis on digital stethoscopes, and discusses how they can be used to improve healthcare delivery. This article was authored by Jun Jiaxia, Jiala Zhao, Deyun Wang, and others. We are article.tv, links in the description below.