Tone hole
In wind instruments, a tone hole is a hole that can be closed and opened either with a finger or a flap in order to change the length of the vibrating air column of the instrument and thus the pitch . The handle system of modern woodwind instruments consists of several such tone holes that are drilled into the body . The exact placement and size of the holes has a great influence on the intonation of the instrument.
If the tone hole is covered with a finger, you can also by a finger hole speak. The picture on the right shows a recorder with finger holes highlighted in color. For instruments with a larger body and more complicated hole systems also or exclusively be flaps used to close the tone holes.