16-08-2011, 11:18 AM
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ABSTRACT
Electronic stethoscopes require conversion of acoustic sound
waves to electrical signals which
can then be amplified and
processed for optimal listening.
It can be a wireless recording
device, and can provide noise
reduction, signal enhancement,
and both visual and audio output .
INTRODUCTION
Electronic stethoscope is an acoustic medical device for auscultation, or listening to the internal sounds of an animal body usually.
It overcomes the low sound levels by electronically amplifying body sounds.
MOTIVATION
The Electronic Stethoscope is preferred to
normal stethoscope as it hears patient's heart and lungs clearly in high noise environments (up to 100 dB levels), even through layers of clothing.
The ES also makes it possible to hear fetal sounds clearly and to monitor blood pressure through clothing layers.
BLOCK DIAGRAM
SCHEMATIC
LAYOUT
CIRCUIT DESCRIPTION
LM358 : SPECIFICATIONS
LM386 : SPECIFICATIONS
UA741 : SPECIFICATIONS
APPLICATIONS
It Helps The Doctor Detect The Faintest Abnormality.
Not only useful for doctors, but home mechanics, exterminators, spying and any number of other uses .
