Every now and then, if your room is quiet enough you’ll hear a random cracking sound that seems to come from the wall. Why does it do that and what is happening when it does? Why are some ‘cracks’ louder than others?
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In my cement house in Portugal we realized it was the electrical wires. My brother and I kept thinking it was rats (somehow living inside cement?), but my dad kinda traced the sound to the plugs
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