Why Can You Hear Music from Your Neighbors?

Imagine you're listening to your favorite song, and suddenly the music from your neighbor’s room starts playing too. That's because sound waves, like invisible ripples in air, are traveling through walls or windows and reaching your ears. When a loudspeaker plays sound, it makes the air vibrate, and those vibrations travel until they reach another person's ear, even if that person is next door! It’s like when you drop something on the floor, and you can feel the vibrations in your feet.