Final answer:
The term for a type of organ pipe that is open at one end but closed is Organ Diapason.
Step-by-step explanation:
The term for a type of organ pipe that is open at one end but closed is Organ Diapason. Examples of organ pipes that are open at one end but closed include some flutes and oboes. In tubes open at both ends, like these organ pipes, the air columns have maximum air displacements at both ends, forming standing waves. These resonances can be analyzed in a similar fashion to tubes closed at one end.