Shorter strings vibrate faster than longer ones, which is why they sound higher in pitch.

The longer version

A string fixed at both ends supports a standing wave whose lowest rate is set by length, tension and mass. Halve the vibrating length and the wave has half the distance to cover each round trip, so it completes cycles twice as often and the pitch rises an octave.

Players use that rule constantly: pressing a string against a fingerboard shortens it, and each fret marks a fixed ratio rather than a fixed length. Thicker and heavier strings are chosen for the low notes precisely because mass slows the vibration down. Overtones ride on top of that fundamental and give each instrument its colour.

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.