Sound travels: as vibrations through different media

In all the above activities you noticed that vibrations are there in different places. For instance, in the paper cup activity, your friend feels the vibrations along the string when you speak. The same is true for the singing spoon activity, where you feel vibrations in the string attached to the spoon. Not only that, you also feel the vibrations in the balloon when you stand near your friend making “ouuu” sound. These instances show that sound travels in the form of vibrations from one place to another place. We perceive sound only in the form of vibrations. The vibrations could travel through any media (solid, liquid or gas).