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Crackles - Fine (Rales) | Lessons with Audio and Video | #72

Fine crackles are characteristically heard as sounding like the popping of a wood fire or velcro being pulled apart. Early inspiratory and expiratory crackles frequently accompany chronic bronchitis, while late inspiratory crackles can indicate more serious medical conditions such as pneumonia, congestive heart failure (CHF), or atelectasis.

Auscultation Sounds

auscultation sound from lesson

Patient Recording

patient heart or lung sound
Crackles - Fine (Rales)

Patient Recording - Half Speed

patient heart or lung sound
Crackles - Fine (Rales)


Patient position
The patient's position should be seated.

Listening Tips

Features:Rales are brief, discontinuous, popping sounds that are high-pitched. Similar to wood burning in a fireplace. More commonly heard during inspiration

Waveform (Phonocardiogram)

Authors and Sources

Authors and Reviewers


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Crackles - Fine (Rales) | Lessons with Audio and Video | #72
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