Question

In wind instruments, pitch increases on ___________ the length of air column.

Answer 1

1. When the length of a string is changed, it will vibrate with a different frequency.
2. Shorter strings have a higher frequency and therefore higher pitch.
3. The natural frequency of a wind instrument such as the flute is dependent upon the length of the air column of the instrument.
4. Therefore, as the length of a vibrating column increases, its frequency decreases and vice versa

Hence, in wind instruments, the pitch increases by reducing the length of the air column.