What sound would you require digital cameras to make?

GOP Rep. Peter King of NY-3, is likely to be the chairman of the Homeland Security Committee when congress reconvenes in January. He’s addressed public safety issues big and small. Among the pieces of legislation he’s sponsored is a bill "To require mobile phones containing digital cameras to make a sound when a photograph is taken."

The sound digital cameras often make now are echoes of the old SLR cameras, when the shudder would literally lift up (then down, very quickly), allowing light to pass through the camera lens and directly hit a section of film in the camera. 

What sound would you require digital cameras to make?