CRUNCH bar
Nestle Crunch
You create friction when you take off your clothes. The crackling sound is the static electricity.
Pops?
Pop Rocks make a crackling sound when the carbon dioxide inside them is released. Cool.
a crackling noise
The crackling sounds are usually made by snapping shrimps.
To make it crackle.
yes
That crackling sound is your hard drive being read, and it can be fixed by replacing your hard drive with an expensive Solid State Drive.
candy bar
The crackling sound is caused by static electricity, which is produced by the friction of your jersey.