Closed-Closed tube: A closed-closed tube is a musical instrument or resonator that has both ends closed, causing sound waves to reflect off the closed ends.
Open-Closed tube:An open-closed tube is a musical instrument or resonator that has one end open and one end closed, resulting in unique sound characteristics.
Resonance: Resonance occurs when an object vibrates at its natural frequency due to the influence of an external force. In the case of tubes, resonance determines the pitch produced.