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