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.
Abnormal Breath Sounds. There are several abnormal sounds that can be heard over the lung fields. Click on the stethoscope to hear the abnormal lung sound. Click on the name of the abnormal lung sound to learn more about the sound. Wheezes (Sibilant)-a high-pitched, musical sound similar to a squeak. It is heard most commonly during expiration, but also can be heard during inspiration. It is heard in narrowed airway diseases such as asthma and chronic emphysema.