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.
Normal breath sounds vary according to the diameter of the airways. For example, anteriorly over the trachea, you should hear a loud, high-pitched, hollow sound called a bronchial breath sound. It is abnormal to hear this sound over peripheral lung tissue, that is, away from the trachea and the large bronchi.Over the mainstem bronchi, which are relatively large-diameter airways, you should hear medium-pitched and quieter sounds, called bronchovesicular breath sounds.t is abnormal to hear this sound over peripheral lung tissue, that is, away from the trachea and the large bronchi. Over the mainstem bronchi, which are relatively large-diameter airways, you should hear medium-pitched and quieter sounds, called bronchovesicular breath sounds.