Abnormal Lung Sounds

Fine Crackles

high-pitched popping sounds
**may be cleared by coughing
conditions: emphysema, bronchitis, asthma

Coarse Crackles

Low-pitched bubbling, moist sounds throughout expiratory cycle;
**sounds like velcro being pulled apart
conditions: pneumonia, pulmonary edema

Wheeze (sibilant stridor)

High-pitched "continuous musical" sound on inspiratin and expiration
conditions: asthma, chronic emphysema

Wheeze (sonorous)
Sometimes called "rhonchi"

low-pitched moaning or grunting sound usually heard in expiration; may be cleared by coughing
conditons; bronchitis, croup in children