Sound and Electrical Energy.
Sound energy is something you hear, sound relates to the repetitive compression (squeezing) and rarefaction (letting out) of molecules in a substance (solid, liquid, or gas.) Example, Dolphins splashing. Electrical energy is basically something that's plugged in, in order to make it work. Electrical energy is related to the movement or flow of electrons which carry a charge to power something. Example, a lamp needs electrical energy to be powered on.