Abstract: Discloses a proximity detection system mounted in combination with a TV receiver adapted to disrupt the programs of the receiver at the times when objects of at least the dimensions of children are positioned within a designated distance from the television picture. Detection system includes actuation means supplying electrical power to energize detection system. An acoustic pulse transducer means produces discrete periodic acoustic pulses into the viewing area and detects acoustic signals reflected back from the viewing area. A comparator means receives a signal corresponding to each of electrical pulses and echo signals and produces an actuating signal as a function of the distance between the transducer and target object. A receiver program disruption means operates to disrupt the TV program during such time when object is within a designated distance from the transducer.