Flutes are reedless instruments that produce sound from the flow of air across a hole in a cylindrical tube. Reed instruments produce sound by focusing air into a mouthpiece that causes a reed to vibrate.
Woodwind instruments utilize human breath to generate sound. The vibration in the mouthpiece caused by the musician’s breath is channeled and amplified by the instrument. These amplified vibrations are turned into sound. Fluctuating the breath that goes into the instrument, or changing the escape points for the air inside the main tube, creates various notes. Wind instruments generally use either a cylindrical or a cone shape to harness and release their sound. The flute, clarinet and saxophone are all examples of woodwind instruments.