I lie in bed drifting of to sleep but I hear random clicking and creaking noises coming from somewhere in the house.
What is actually producing those noises? I’m aware with heat and cooling, joins expand and retract but to produce a quick clicking noise, I would expect it would require some velocity between two objects colliding. How are these noises made when nothing of significant scale is moving?
In: Physics
As joint cools or warms you are right the materials expand and contract at different rates. However friction between materials resists the movement so its not smooth and gradual. Instead once enough force has built up to overcome the friction…..then it moves suddenly. Hence the clicking type of noise.
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