There is a big horn and a crank. What's that thing called?

This is a joke told by Ge You in "Big Man". There are too many patients in a mental hospital, and the dean decided to choose a moderate and considerate person from the patients as the director to help the medical staff do a good job in management. So they went to the first floor, and the dean pointed to what was in his hand. "What is this?" "Apple" is answered by a patient. "What's the use?" Yes, you are the person in charge on the first floor.

Dean, they came to the second floor again. "What is this in my hand?" "Banana" said a patient. "What's the use?" "Food" and "Well, you are the director on the second floor" and then they came to the third floor. The storyteller said there was a big horn and a crank. When it is shaken, it will make a sound and play music. What's its name? You will definitely answer the "phonograph" without hesitation, and in this way, you are elected as the director of the third floor. Congratulations.