String instruments make sound through the vibration of their strings. Here’s how it works:

1. Plucking, Bowing, or Striking: The strings are set into motion by plucking (as in a guitar or harp), bowing (as in a violin or cello), or striking (as in a piano). This action causes the strings to vibrate.

2. Vibration of Strings: The vibration of the strings creates sound waves in the air. The frequency of the vibration determines the pitch of the sound; shorter, tighter, or thinner strings produce higher pitches, while longer, looser, or thicker strings produce lower pitches