What affects the speed of sound as it travel?

Question: What affects the speed of sound as it travel?

There are three main factors that affect the speed of sound wave are temperature, density and stiffness of the medium that the wave travels through. The speed of the sound depends on the density and the elasticity of the medium through which it travels. Sound travels fastest through the solids. This is because molecules in a solid medium are much closer together than those in a liquid and gases allowing sound waves to travel more quickly through it.