Scream Fountain: As a new type of water feature entertainment, its principle is to control the frequency inverter's output frequency by simulating variable voltage based on the pitch and duration of human voice. Changing the frequency alters the motor speed, which in turn modifies the pump pressure. This allows for controlling the pump speed to adjust the water flow rate and the height of the jet, determining the fountain's height and duration. It's an enjoyable and aesthetically pleasing water feature project.