What do we mean by Crackling?
Choose for yourself! Which one crackles?
Wood pencils, when bent, break in one loud
SNAP.
Popcorn, when heated, explodes in lots of small
POPS, all about the same size.
Fire CRACKLES. Something about
the way the flame eats into the wood happens in
bursts. The bursts come in all sizes: lots of small ones,
some medium sized ones, and a few big ones. We hear all
these bursts as crackling noise.
Scientists have just started to think about crackling noise in the past few years.
We have studied the crackling noise from crumpling
paper and from magnets.
Just for you, we've recorded the crackling noise in
Rice KrispiesTM.
Our friends have studied how the earth crackles - giving
earthquakes.
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