The invention concerns a sound control installation for at least one electrical unit comprising two cameras (4, 5) to take pictures of an area (A) in a space containing the electrical units; three microphones (6, 7, 8) positioned at different locations to sense the sounds in said space; a control screen (3) displaying an image of the space and the electrical units; a control device for positioning on the control screen a cursor (C) in accordance with the movements of the hand of a user detected by the cameras, and for controlling an electrical unit when: the cursor is on the image of an electrical unit, a sound is produced, and a system associated with the microphones checks that the origin of the sound is close to the position of the hand.