stethoscope is commonly and routinely used in medical practice by physicians,
nurses, respiratory therapists and other practitioners to obtain important
information about the health of patients. In some ways this is a surprise
in view of the many studies that show that observer variability is high
in the use of the stethoscope. Advances in computer processing have made
it possible to obtain the information contained in lung sounds more accurately
and efficiently. Waveform patterns can be generated in real time that
show differences between common illnesses.