lung sounds

Snoring

partial upper airway obstruction (usually the tongue blocking the oropharynx)

Wheezing

indicates narrowing of the bronchioles in the lower airway, heard on exhalation as high pitched sounds

Crackles

air trying to pass through fluid in the alveoli, rattling breath sounds, lower airway

Rhonchi

low pitched rattling sounds caused by secretions in the large airway

Stridor

high pitched sounds heard on inspiration which indicates air trying to pass through an obstruction in the upper airway