It's not until after she dies that Scout and Jem get a sense of what's going on behind the drool and venom: Mrs. Dubose is a morphine addict who had vowed to go clean before she died, and enlisted Jem and Scout (without their knowledge) to keep her off the stuff for longer and longer periods of time.
http://lungsounds.net/rales-lung-sounds/ - Rales lung sounds are small rattling noises heard around the lung. This happens when air exposes closed air spaces. Rales can be shown as wet, dry and coarse.
Respiratory sounds, breath sounds, or lung sounds refer to the specific sounds generated by the movement of air through the respiratory system.These may be easily audible or identified through auscultation of the respiratory system through the lung fields with a stethoscope. Usually it is due to a blockage of airflow in the windpipe (trachea) or in the back of the throat. 2  Wheezing: High-pitched sounds produced by narrowed airways. 3  They are most often heard when a person breathes out (exhales).