Question

Sound needs a medium to travel.explin

Answer 1

Sound cannot travel through vacuum, it always need a medium to propagate. This Experiment Shows that : Sound cannot travel through vacuum, but can travel through air. Thus, a material medium is necessary for the propagation of sound.

Answer 2

sOUNd requires a medium  such as solid, liquid, and air to travel because sound travels fastest in solids and sound cannot travel through vacuum.