Question

In wind instruments, pitch of sound increases when length of air column is ______________

Answer 1

1. A change in wavelength will result in a change in frequency.
2. So the natural frequency of a wind instrument such as the trombone is dependent upon the length of the air column of the instrument.
3. Therefore, as the length of a vibrating column decreases, its frequency increases and vice versa.
4. Pitch is related to frequency in a way that the higher the frequency, the higher the pitch and vice versa.

Hence, In wind instruments, the pitch of sound increases when the length of the air column is decreaced.