Text can tell you a wheeze is "high-pitched and musical" and a crackle is "discrete and popping" — but that distinction only really locks in once you've actually heard both. Recorded breath sounds and generated heart sounds below, then quiz mode, which brings back whatever you keep getting wrong.
A note on these recordings: the wheeze, crackles, and stridor clips are real auscultation recordings sourced from Wikimedia Commons (each individually credited and licensed CC BY-SA). The rhonchi and normal breath sound clips are also playable directly here, with a link to the Hawaii COPD Coalition's lung sounds page if you'd like to hear more from the original source.
Listen & Compare
Click any card to hear the actual sound. Click again to stop it. Play them back to back — that's the fastest way to train your ear.
Quiz Mode
A clip plays, you guess what it is, you find out immediately whether you were right — and why.