Which reminds me... If your clock is noisy it's because the electronics inside it are getting tired. 'Electronic parts cause noise!' I hear you exclaim 'Surely you can't be serious?' Well I am serious et cetera et cetera..... wont start cos that clock you can sometimes hear ticking from the house has flattened the bleadin battery again
There is an RC circuit (RC = Resistor Capacitor) that provides the energy to kick the moving parts. As the capacitor ages the kick provided gets weak, this has some effect on accuracy but not that much because the clock is mechanically regulated for time. The weak kicks do mean the gears inside don't mesh fully which is what makes your clock noisy. In extreme cases the hands can stop briefly while there is a graunching noise from inside as the gears clash instead of meshing.
The fix is easy, change the capacitor. The type and value of the capacitor need not be exact just change the resistor as well so that the RC constant remains the same.
Tinweevil