Why is water said to be “incompressible” when sound can travel through it? Doesn’t sound imply compressions and rarefactions?

Question

Why is water said to be “incompressible” when sound can travel through it? Doesn’t sound imply compressions and rarefactions?

In: 93

Answer 1

water is compressible but, for the sake of equation simplicity, it is considered to be incompressible.