Sound is more than just noise—it’s actually energy moving through the air (or water, or even metal). The science of sound is a branch of physics that studies how this energy travels in waves, how those waves behave, and how we experience them as sound.

When something vibrates—like a drum skin or your vocal cords—it sets off a chain reaction. That vibration pushes nearby particles, which push others, creating a wave that carries energy from one place to another. That’s how you can hear someone clapping across the room! In this article, we’ll explore the physics behind sound: what sound waves really are, how they move, how pitch and loudness work, and how your ears and brain turn these invisible waves into something you understand.