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Crackles - Coarse (Rales)

Coarse crackles are a loud and distinctive lung sound, often described as popping or bubbling. These intermittent sounds have a lower pitch than their fine counterparts and tend to linger longer in duration - try simulating the noise by rolling pieces of hair between your fingers near your ear!

Auscultation Sounds

auscultation sound from lesson

Patient Recording

patient heart or lung sound
Crackles - Coarse (Rales)

Patient Recording - Half Speed

patient heart or lung sound
Crackles - Coarse (Rales)


Patient position
The patient's position should be seated.

Listening Tips

Features:Course crackles are discontinuous, brief, popping sounds. Similar to the sound of a hook and loop fastener being pulled apart. They have also been described as a bubbling sound. More common during inspiration

Waveform (Phonocardiogram)

Authors and Sources

Authors and Reviewers


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Crackles - Coarse (Rales) | Lessons with Audio and Video | #73

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