A guitar body amplifies the string vibration by forcing a larger surface of air to move.

The longer version

A thin string cuts through air without moving much of it, so almost no energy reaches a listener. Couple that string to a wide, light panel through a bridge and the same small force drives a large area, and a large area pushes far more air.

The hollow box behind the panel adds a resonator tuned by its volume and the hole in its top, reinforcing low notes. Solid-bodied electric designs skip that coupling and instead convert string motion into an electrical signal sent to a speaker. Matching matters: a panel that is too heavy barely moves, and one that is too floppy wastes energy.

Where this entry sits

Sound and Music gathers facts about how vibrations move through air and water, how ears turn them into meaning, and how instruments and notation shape what listeners hear. Expect echoes, pitch, volume, acoustics, and the odd silence in between. The full list sits on the Sound and Music page, where every entry is listed in order.