Could you tell me how sound travels?

this will be a refresher because sound waves travel through air (among other things that are made of molecules).Sound is vibration,or energy,that gets all the molecules around the source of that vibration all excited,so they vibrate too and start bumping into each other and pass along the vibrations.It's kind of a molecular mosh pit.The molecules lose some of their excitement the further away they are from the source of the vibration so the noise gets quieter and quieter until the molecules run out of vibrations and there the sound ends.