What happens when the pitch of sound found inc rease with decrease in length of vibrating air column?

When the pitch of sound increases, it typically corresponds to a higher frequency of the sound wave. In the case of a vibrating air column, a decrease in the length of the column results in an increase in frequency, which raises the pitch. This is because shorter air columns allow for faster vibrations and shorter wavelengths, leading to higher frequencies and, consequently, a higher perceived pitch of the sound.