The fluids filling and surrounding it act as shock absorbers, and so do the springy membranes which support it.
It is even isolated from the normal body supply lines, for the faint pulsing of blood through capillary vessels would be detected as background noise.
The capillaries nearest to the organ of Corti end at the wall of the cochlea; nutrients on their way out are carried to and from the capillaries by the endolymph fluid that bathes the organ.