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

A medium doesn’t need to be compressible in order to propagate sound. When you jostle water molecules they push against other water molecules and move them around. That movement Carrie’s sound.