Wind instruments make use of the length of the air column to produce sound.
These are also called reed-type instruments. Wind instruments are wood, although some are made of metal or plastic. generally made of wood, although some are made of metal or plastic.
By increasing or decreasing the length of the air column, which is done by opening or closing the holes cut into them, vibrations of different frequencies are set up, which produces sweet music.
Here, frequency increases with the decrease in the length of the air column.
Reed-type instruments like the clarinet and the saxophone contain metal reeds (thin tubes) that produce sound when air is blown into them.
The mouth organ and the harmonium are also examples of reed-type musical instruments.