Why sound can be muffled, like through a wall, instead of just stop at the wall? Why does it keep going?

Question

Why sound can be muffled, like through a wall, instead of just stop at the wall? Why does it keep going?

In: 2

Answer 1

The sound waves move the walls which also makes a similar frequency and transmits a sound itself through harmonic resonation, much like an instrument being blown into.