Crackle is a sharp, snapping sound that comes in quick bursts, like the noise of a campfire or the sound of static on an old radio. When wood burns, it makes a distinctive crackling sound as pockets of moisture and sap suddenly heat up and pop. When you walk on fallen autumn leaves, they crackle and crunch beneath your feet.

The word captures both the sound itself and the feeling it creates: sudden, irregular, full of energy. Bacon crackles in a hot pan. Rice Krispies cereal famously snap, crackle, and pop when you pour milk over it. An old vinyl record might crackle as the needle moves through dusty grooves.

You can use crackle as a verb (“The fire crackled cheerfully”) or as a noun (“We heard the crackle of breaking ice”). The word suggests something alive and active, which is why we talk about the air crackling with excitement or tension before a big game or performance. That crackle of anticipation is almost like electricity in the air, even though you can't actually hear electricity.