An open-closed tube is a tube that is open on one end and closed on the other. This means that one end of the tube is free to vibrate, while the other end is fixed, resulting in different harmonics and sound frequencies.
The fundamental frequency of an open-closed tube is the lowest frequency that can be produced by the tube. It is determined by the length of the tube and the speed of sound in the medium it is placed in.
The length of an open-closed tube affects its harmonics by determining the wavelengths of the standing waves that can be produced within the tube. Longer tubes will have longer wavelengths and therefore lower harmonics, while shorter tubes will have shorter wavelengths and higher harmonics.
The harmonics of an open-closed tube are the different frequencies of sound that can be produced within the tube. These frequencies are multiples of the fundamental frequency and are determined by the length of the tube.
An open-closed tube and a closed-closed tube have different harmonics due to their different boundary conditions. An open-closed tube has odd-numbered harmonics only, while a closed-closed tube has both odd and even-numbered harmonics. This is because the open end of an open-closed tube allows for displacement, while the closed end of a closed-closed tube does not.