Auscultation Training by Repetition

Crackles - Late Inspiratory (Rales)

waveform of heart or lung sound
Listen for 2-3 minutes

Listening Tips

Crackles begin in late inspiration and increase. High pitched, variable loudness. Best heard over posterior bases of the lungs. Do not usually clear with coughing.

repetition training button

Lesson Text

If you wish to review a complete lesson concerning this sound, the following lesson modules(s) may be useful. Each lesson includes text that covers an auscultatory sound, a waveform and an animation video.

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