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.
AnswerDo you have any coolant in it? It sounds bone dry. Or did you get cheap gas recently?
Polyurethane can be recycled.
I was startled awake by the fire's crackling sounds. The lightning came crackling past my head and struck the tree.
To find out about paint crackling check out www.diynetwork.com/how-to/a-crackle-painted-wall/index.html. They will provide you with easy instructions for paint crackling application.
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Otto Bayer invented polyurethane.
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Crackling in any joint is called crepitus. Medial plica syndrome is one possible cause of crackling in the knee joint.
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Crackling only occurs if there is a short in the cable or your hardware.
The crackling sounds are usually made by snapping shrimps.