The flow of a fluid such as water is controlled through an outlet by detecting sound within an environment at a first time and generating a first profile based upon the content of the sound detected at the first time. The flow of the fluid is further controlled by detecting sound within the environment at a second time and generating a second profile based upon the content of the sound detected at the second time. The flow of the fluid is still further controlled by comparing the second profile with the first profile and controlling a control valve to shut off a supply of the fluid exiting a tap based upon the results of the comparison.