AuscultifyLung Sounds for Nursing Students: The 6 to Know for NCLEX
Respiratory assessment shows up on every med-surg exam, in clinicals, and on NCLEX. You don't need to know a hundred sounds — you need to recognize six and chart them correctly. Here they are, with the one cue that identifies each.
The six sounds
| Sound | Key cue | Think |
|---|---|---|
| Fine crackles | Soft popping, end-inspiration — Velcro | Pulmonary edema, fibrosis, atelectasis |
| Coarse crackles | Louder, wetter, bubbling | Pneumonia, secretions, CHF |
| Wheezes | High-pitched whistle, expiratory | Asthma, COPD |
| Rhonchi | Low snore-like; may clear with cough | Secretions in large airways |
| Stridor | Loud inspiratory crowing over the neck | Upper-airway obstruction — emergency |
| Pleural friction rub | Grating/creaking, both phases, doesn't clear | Pleuritis, pleural inflammation |
Also know diminished/absent sounds — reduced airflow from pneumothorax, effusion, or shallow breathing.
Assess systematically
Listen with the diaphragm, one full breath at each spot, comparing left to right as you move down and out: apices, then posterior bases, then lateral. Note timing (inspiration vs expiration), continuity (popping vs sustained), and whether it clears with a cough (points to rhonchi over crackles). That's the charting language your instructors want.
The exam trap
Test questions rarely say "the patient has crackles" — they describe a sound or a scenario and expect you to name it and act. That means you have to recognize the actual audio, not just memorize a definition. Which is exactly the skill a written cheat sheet can't give you.
Hear all six in Auscultify
Auscultify's Lung Sounds and Screening modes quiz you on real recordings of crackles, wheezes, rhonchi and rubs, with instant feedback in the same language you'll chart in. Do ten questions between classes, build a streak, and walk into clinicals already able to tell fine crackles from a wheeze by ear.
Practice for NCLEX free →