Learn to design and develop a digital stethoscope system in this 14-minute engineering tutorial from NPTEL-NOC IITM. Explore the fundamental principles behind converting traditional acoustic stethoscope functionality into digital format, covering sensor integration, signal processing techniques, and electronic circuit design. Discover how to capture, amplify, and digitize heart and lung sounds using modern electronics and microcontroller systems. Examine the hardware components required including microphones, amplifiers, filters, and analog-to-digital converters, while understanding the software algorithms needed for sound processing and analysis. Gain practical insights into medical device development, biomedical instrumentation principles, and the technical challenges involved in creating accurate digital diagnostic tools for healthcare applications.